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Why the Ford Pinto didn’t suck

Why the Ford Pinto didn't suckThe Ford Pinto was born a low-rent, stumpy thing in Dearborn 40 years ago and grew to become one of the most infamous cars in history. The thing is that it didn't actually suck. Really.

Even after four decades, what's the first thing that comes to mind when most people think of the Ford Pinto? Ka-BLAM! The truth is the Pinto was more than that — and this is the story of how the exploding Pinto became a pre-apocalyptic narrative, how the myth was exposed, and why you should race one.

The Pinto was CEO Lee Iacocca's baby, a homegrown answer to the threat of compact-sized economy cars from Japan and Germany, the sales of which had grown significantly throughout the 1960s. Iacocca demanded the Pinto cost under $2,000, and weigh under 2,000 pounds. It was an all-hands-on-deck project, and Ford got it done in 25 months from concept to production.

Building its own small car meant Ford's buyers wouldn't have to hew to the Japanese government's size-tamping regulations; Ford would have the freedom to choose its own exterior dimensions and engine sizes based on market needs (as did Chevy with the Vega and AMC with the Gremlin). And people cold dug it.

When it was unveiled in late 1970 (ominously on September 11), US buyers noted the Pinto's pleasant shape — bringing to mind a certain tailless amphibian — and interior layout hinting at a hipster's sunken living room. Some call it one of the ugliest cars ever made, but like fans of Mischa Barton, Pinto lovers care not what others think. With its strong Kent OHV four (a distant cousin of the Lotus TwinCam), the Pinto could at least keep up with its peers, despite its drum brakes and as long as one looked past its Russian-roulette build quality.

But what of the elephant in the Pinto's room? Yes, the whole blowing-up-on-rear-end-impact thing. It all started a little more than a year after the Pinto's arrival.

 

Grimshaw v. Ford Motor Company

On May 28, 1972, Mrs. Lilly Gray and 13-year-old passenger Richard Grimshaw, set out from Anaheim, California toward Barstow in Gray's six-month-old Ford Pinto. Gray had been having trouble with the car since new, returning it to the dealer several times for stalling. After stopping in San Bernardino for gasoline, Gray got back on I-15 and accelerated to around 65 mph. Approaching traffic congestion, she moved from the left lane to the middle lane, where the car suddenly stalled and came to a stop. A 1962 Ford Galaxie, the driver unable to stop or swerve in time, rear-ended the Pinto. The Pinto's gas tank was driven forward, and punctured on the bolts of the differential housing.

As the rear wheel well sections separated from the floor pan, a full tank of fuel sprayed straight into the passenger compartment, which was engulfed in flames. Gray later died from congestive heart failure, a direct result of being nearly incinerated, while Grimshaw was burned severely and left permanently disfigured. Grimshaw and the Gray family sued Ford Motor Company (among others), and after a six-month jury trial, verdicts were returned against Ford Motor Company. Ford did not contest amount of compensatory damages awarded to Grimshaw and the Gray family, and a jury awarded the plaintiffs $125 million, which the judge in the case subsequently reduced to the low seven figures. Other crashes and other lawsuits followed.

Why the Ford Pinto didn't suck

Mother Jones and Pinto Madness

In 1977, Mark Dowie, business manager of Mother Jones magazine published an article on the Pinto's "exploding gas tanks." It's the same article in which we first heard the chilling phrase, "How much does Ford think your life is worth?" Dowie had spent days sorting through filing cabinets at the Department of Transportation, examining paperwork Ford had produced as part of a lobbying effort to defeat a federal rear-end collision standard. That's where Dowie uncovered an innocuous-looking memo entitled "Fatalities Associated with Crash-Induced Fuel Leakage and Fires."

The Car Talk blog describes why the memo proved so damning.

In it, Ford's director of auto safety estimated that equipping the Pinto with [an] $11 part would prevent 180 burn deaths, 180 serious burn injuries and 2,100 burned cars, for a total cost of $137 million. Paying out $200,000 per death, $67,000 per injury and $700 per vehicle would cost only $49.15 million.

The government would, in 1978, demand Ford recall the million or so Pintos on the road to deal with the potential for gas-tank punctures. That "smoking gun" memo would become a symbol for corporate callousness and indifference to human life, haunting Ford (and other automakers) for decades. But despite the memo's cold calculations, was Ford characterized fairly as the Kevorkian of automakers?

Perhaps not. In 1991, A Rutgers Law Journal report [PDF] showed the total number of Pinto fires, out of 2 million cars and 10 years of production, stalled at 27. It was no more than any other vehicle, averaged out, and certainly not the thousand or more suggested by Mother Jones.

Why the Ford Pinto didn't suck

The big rebuttal, and vindication?

But what of the so-called "smoking gun" memo Dowie had unearthed? Surely Ford, and Lee Iacocca himself, were part of a ruthless establishment who didn't care if its customers lived or died, right? Well, not really. Remember that the memo was a lobbying document whose audience was intended to be the NHTSA. The memo didn't refer to Pintos, or even Ford products, specifically, but American cars in general. It also considered rollovers not rear-end collisions. And that chilling assignment of value to a human life? Indeed, it was federal regulators who often considered that startling concept in their own deliberations. The value figure used in Ford's memo was the same one regulators had themselves set forth.

In fact, measured by occupant fatalities per million cars in use during 1975 and 1976, the Pinto's safety record compared favorably to other subcompacts like the AMC Gremlin, Chevy Vega, Toyota Corolla and VW Beetle.

And what of Mother Jones' Dowie? As the Car Talk blog points out, Dowie now calls the Pinto, "a fabulous vehicle that got great gas mileage," if not for that one flaw: The legendary "$11 part."

Why the Ford Pinto didn't suck

Pinto Racing Doesn't Suck

Back in 1974, Car and Driver magazine created a Pinto for racing, an exercise to prove brains and common sense were more important than an unlimited budget and superstar power. As Patrick Bedard wrote in the March, 1975 issue of Car and Driver, "It's a great car to drive, this Pinto," referring to the racer the magazine prepared for the Goodrich Radial Challenge, an IMSA-sanctioned road racing series for small sedans.

Why'd they pick a Pinto over, say, a BMW 2002 or AMC Gremlin? Current owner of the prepped Pinto, Fox Motorsports says it was a matter of comparing the car's frontal area, weight, piston displacement, handling, wheel width, and horsepower to other cars of the day that would meet the entry criteria. (Racers like Jerry Walsh had by then already been fielding Pintos in IMSA's "Baby Grand" class.)

Bedard, along with Ron Nash and company procured a 30,000-mile 1972 Pinto two-door to transform. In addition to safety, chassis and differential mods, the team traded a 200-pound IMSA weight penalty for the power gain of Ford's 2.3-liter engine, which Bedard said "tipped the scales" in the Pinto's favor. But according to Bedard, it sounds like the real advantage was in the turns, thanks to some add-ons from Mssrs. Koni and Bilstein.

"The Pinto's advantage was cornering ability," Bedard wrote. "I don't think there was another car in the B. F. Goodrich series that was quicker through the turns on a dry track. The steering is light and quick, and the suspension is direct and predictable in a way that street cars never can be. It never darts over bumps, the axle is perfectly controlled and the suspension doesn't bottom."

Need more proof of the Pinto's lack of suck? Check out the SCCA Washington, DC region's spec-Pinto series.

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My Somewhat Begrudging Apology To Ford Pinto

ford-pinto.jpg

I never thought I’d offer an apology to the Ford Pinto, but I guess I owe it one.

I had a Pinto in the 1970s. Actually, my wife bought it a few months before we got married. The car became sort of a wedding dowry. So did the remaining 80% of the outstanding auto loan.

During a relatively brief ownership, the Pinto’s repair costs exceeded the original price of the car. It wasn’t a question of if it would fail, but when. And where. Sometimes, it simply wouldn’t start in the driveway. Other times, it would conk out at a busy intersection.

It ranks as the worst car I ever had. That was back when some auto makers made quality something like Job 100, certainly not Job 1.

Despite my bad Pinto experience, I suppose an apology is in order because of a recent blog I wrote. It centered on Toyota’s sudden-acceleration problems. But in discussing those, I invoked the memory of exploding Pintos, perpetuating an inaccuracy.

The widespread allegation was that, due to a design flaw, Pinto fuel tanks could readily blow up in rear-end collisions, setting the car and its occupants afire.

People started calling the Pinto “the barbecue that seats four.” And the lawsuits spread like wild fire.

Responding to my blog, a Ford (“I would very much prefer to keep my name out of print”) manager contacted me to set the record straight.

He says exploding Pintos were a myth that an investigation debunked nearly 20 years ago. He cites Gary Schwartz’ 1991 Rutgers Law Review paper that cut through the wild claims and examined what really happened.

Schwartz methodically determined the actual number of Pinto rear-end explosion deaths was not in the thousands, as commonly thought, but 27.

In 1975-76, the Pinto averaged 310 fatalities a year. But the similar-size Toyota Corolla averaged 313, the VW Beetle 374 and the Datsun 1200/210 came in at 405.

Yes, there were cases such as a Pinto exploding while parked on the shoulder of the road and hit from behind by a speeding pickup truck. But fiery rear-end collisions comprised only 0.6% of all fatalities back then, and the Pinto had a lower death rate in that category than the average compact or subcompact, Schwartz said after crunching the numbers. Nor was there anything about the Pinto’s rear-end design that made it particularly unsafe.

Not content to portray the Pinto as an incendiary device, ABC’s 20/20 decided to really heat things up in a 1978 broadcast containing “startling new developments.” ABC breathlessly reported that, not just Pintos, but fullsize Fords could blow up if hit from behind.

20/20 thereupon aired a video, shot by UCLA researchers, showing a Ford sedan getting rear-ended and bursting into flames. A couple of problems with that video:

One, it was shot 10 years earlier.

Two, the UCLA researchers had openly said in a published report that they intentionally rigged the vehicle with an explosive.

That’s because the test was to determine how a crash fire affected the car’s interior, not to show how easily Fords became fire balls. They said they had to use an accelerant because crash blazes on their own are so rare. They had tried to induce a vehicle fire in a crash without using an igniter, but failed.

ABC failed to mention any of that when correspondent Sylvia Chase reported on “Ford’s secret rear-end crash tests.”

We could forgive ABC for that botched reporting job. After all, it was 32 years ago. But a few weeks ago, ABC, in another one of its rigged auto exposes, showed video of a Toyota apparently accelerating on its own.

Turns out, the “runaway” vehicle had help from an associate professor. He built a gizmo with an on-off switch to provide acceleration on demand. Well, at least ABC didn’t show the Toyota slamming into a wall and bursting into flames.

In my blog, I also mentioned that Ford’s woes got worse in the 1970s with the supposed uncovering of an internal memo by a Ford attorney who allegedly calculated it would cost less to pay off wrongful-death suits than to redesign the Pinto.

It became known as the “Ford Pinto memo,” a smoking gun. But Schwartz looked into that, too. He reported the memo did not pertain to Pintos or any Ford products. Instead, it had to do with American vehicles in general.

It dealt with rollovers, not rear-end crashes. It did not address tort liability at all, let alone advocate it as a cheaper alternative to a redesign. It put a value to human life because federal regulators themselves did so.

The memo was meant for regulators’ eyes only. But it was off to the races after Mother Jones magazine got a hold of a copy and reported what wasn’t the case.

The exploding-Pinto myth lives on, largely because more Americans watch 20/20 than read the Rutgers Law Review. One wonders what people will recollect in 2040 about Toyota’s sudden accelerations, which more and more look like driver error and, in some cases, driver shams.

So I guess I owe the Pinto an apology. But it’s half-hearted, because my Pinto gave me much grief, even though, as the Ford manager notes, “it was a cheap car, built long ago and lots of things have changed, almost all for the better.”

Here goes: If I said anything that offended you, Pinto, I’m sorry. And thanks for not blowing up on me.

Bad virbation

Started by dianne, March 06, 2014, 10:20:00 AM

Previous topic - Next topic

0 Members and 1 Guest are viewing this topic.

dianne

Quote from: dianne on March 22, 2014, 10:27:42 AM
Dave, on here and who I got the car from, is swapping the driveshafts and taking the aluminium shaft with him. That will fix the problem :)

OK, got a driveshaft from otnip - works GREAT AND ZERO vibration!!!!

Thank you otnip!!!

Aluminum shaft was good for regular car (hatch or non) but not for the wagon!
Vehicles:

- 1972 Plymouth Duster (To be a Pro Street)
- 1973 Ford Pinto wagon (registered ride 195)
- 1976 Mustang II mini-stock
- 1978 Mustang King Cobra II
- 1979 Ford Pinto Runabout
- 1986 Chevy K5 Blazer
- 1997 Suzuki Marauder

FORD: Federal Ownership Respectfully Denied

dianne

Quote from: amc49 on March 22, 2014, 04:46:01 AM
One inch only into trans is by all means not enough. Not in enough to hold the driveshaft straight, it will wobble. Pintos commonly had an extended weight at the tailhousing to stifle even normal vibration there as well.

Dave, on here and who I got the car from, is swapping the driveshafts and taking the aluminium shaft with him. That will fix the problem :)
Vehicles:

- 1972 Plymouth Duster (To be a Pro Street)
- 1973 Ford Pinto wagon (registered ride 195)
- 1976 Mustang II mini-stock
- 1978 Mustang King Cobra II
- 1979 Ford Pinto Runabout
- 1986 Chevy K5 Blazer
- 1997 Suzuki Marauder

FORD: Federal Ownership Respectfully Denied

amc49

One inch only into trans is by all means not enough. Not in enough to hold the driveshaft straight, it will wobble. Pintos commonly had an extended weight at the tailhousing to stifle even normal vibration there as well.

Srt

Quote from: pintosopher on March 19, 2014, 08:31:47 PM
I had a bad Virbation once, My doctor never told me My Shaft was too Short  ;D ;D ;D ;D
Seriously , Find the thread on Pinion angle of the two U joints, measure and then check the Stroke of the forward joint into the tailpiece. This is too funny LOL! 8)

Pintosopher, innuendo is a great form of Humor, stock your barn with tons of it!


;) ;D :o ;D :o ;)
the only substitute for cubic inches is BOOST!!!

dianne

The car sagged when I got it, but I did have air shocks thrown on and leveled the car, that could have done it also I guess.
Vehicles:

- 1972 Plymouth Duster (To be a Pro Street)
- 1973 Ford Pinto wagon (registered ride 195)
- 1976 Mustang II mini-stock
- 1978 Mustang King Cobra II
- 1979 Ford Pinto Runabout
- 1986 Chevy K5 Blazer
- 1997 Suzuki Marauder

FORD: Federal Ownership Respectfully Denied

dianne

Quote from: Clydesdale80 on March 19, 2014, 11:47:10 PM
I could be wrong but i feel like there is some confusion here.  :-\

I believe she means that there is an extra 1'' that could be slid into the trans., not that it only had an inch in it to begin with.  If I'm correct then I think the driveshaft length is fine and the problem likely lies elsewhere.

If I'm wrong and you mean that under normal conditions there is only an inch of the shaft inside the transmission, then that could definitely cause some problems.

Sorry if i'm just adding more confusion

It's less than an inch in the tranny. So that's the issue I guess.
Vehicles:

- 1972 Plymouth Duster (To be a Pro Street)
- 1973 Ford Pinto wagon (registered ride 195)
- 1976 Mustang II mini-stock
- 1978 Mustang King Cobra II
- 1979 Ford Pinto Runabout
- 1986 Chevy K5 Blazer
- 1997 Suzuki Marauder

FORD: Federal Ownership Respectfully Denied

Pintosopher

Quote from: dianne on March 19, 2014, 08:59:11 PM
About an inch gets into the transmission. It's vibrating from there.

Yeah, I guess it is funny LOL   :o
Diane, my apologies for the off beat humor, too many hours of CBS television.  If the swapped in Aerostar driveshaft is to short overall (Center to center on the U-joint Yokes) then you'll need to replace the whole unit. If the yoke that inserts into the trans tailpiece is too short, then you could replace that with a pinto unit, but then it might need a driveshaft re-balance to keep the vibes from returning. If the car has had a ride height change, (too high in back, or lowered more than stock) then the u-joints might not have a correct pinion angle relationship, and that will really cause some noise and eventual failure of the joints. As AMC49 said , the bushing the tailpiece does wear out and you can't cure that with another driveshaft.
You should have about 2- 2-1/2 inches or more into the tailpiece with the axle at ride height, less than that is asking for trouble. Just think how many 4X4 driveshafts you might have seen on the side of the road when the length issues were ignored.
Best of Luck,
Pintosopher, One bale short of a full stack ;)
Yes, it is possible to study and become a master of Pintosophy.. Not a religion , nothing less than a life quest for non conformity and rational thought. What Horse did you ride in on?

Check my Pinto Poems out...

74 PintoWagon

Well, it could be but I got the indication that "About an inch gets into the transmission" meant that's all that went in the tranny???, but maybe I understood wrong???..
Art
65 Falcon 2DR 200 IL6 with C4.

Clydesdale80

I could be wrong but i feel like there is some confusion here.  :-\

I believe she means that there is an extra 1'' that could be slid into the trans., not that it only had an inch in it to begin with.  If I'm correct then I think the driveshaft length is fine and the problem likely lies elsewhere.

If I'm wrong and you mean that under normal conditions there is only an inch of the shaft inside the transmission, then that could definitely cause some problems.

Sorry if i'm just adding more confusion
Bought a 1978 hatchback to be my first car.

74 PintoWagon

Only an inch into the tranny???, that's not enough!. When measuring for a drive shaft you push the yoke all the way in then pull it back one inch, then measure center to center of the u-joints between tranny and end.
Art
65 Falcon 2DR 200 IL6 with C4.

dianne

About an inch gets into the transmission. It's vibrating from there.

Yeah, I guess it is funny LOL   :o
Vehicles:

- 1972 Plymouth Duster (To be a Pro Street)
- 1973 Ford Pinto wagon (registered ride 195)
- 1976 Mustang II mini-stock
- 1978 Mustang King Cobra II
- 1979 Ford Pinto Runabout
- 1986 Chevy K5 Blazer
- 1997 Suzuki Marauder

FORD: Federal Ownership Respectfully Denied

Pintosopher

Quote from: dianne on March 19, 2014, 05:30:31 PM
I'm keeping the car. The problem is that driveshaft and it's not long enough so when you're driving it's causing the vibration.

So if anyone has a 1973 wagon driveline/driveshaft I need one...
I had a bad Virbation once, My doctor never told me My Shaft was too Short  ;D ;D ;D ;D
Seriously , Find the thread on Pinion angle of the two U joints, measure and then check the Stroke of the forward joint into the tailpiece. This is too funny LOL! 8)

Pintosopher, innuendo is a great form of Humor, stock your barn with tons of it!
Yes, it is possible to study and become a master of Pintosophy.. Not a religion , nothing less than a life quest for non conformity and rational thought. What Horse did you ride in on?

Check my Pinto Poems out...

amc49

Why is it too short? Has someone mismatched one there?

Jack up rear of car under AXLE so car still rests on suspension, mark present in/out location of yoke in tailhousing seal and remove rear u-joint from axle to allow you to shove driveshaft gently all the way up into housing. If you have one inch or so space difference there the shaft length is not the problem.

Pintos are known for wearing out the end bushing in trans tailhousing to let the driveshaft wobble about.

dianne

I'm keeping the car. The problem is that driveshaft and it's not long enough so when you're driving it's causing the vibration.

So if anyone has a 1973 wagon driveline/driveshaft I need one...
Vehicles:

- 1972 Plymouth Duster (To be a Pro Street)
- 1973 Ford Pinto wagon (registered ride 195)
- 1976 Mustang II mini-stock
- 1978 Mustang King Cobra II
- 1979 Ford Pinto Runabout
- 1986 Chevy K5 Blazer
- 1997 Suzuki Marauder

FORD: Federal Ownership Respectfully Denied

dianne

Thanks. You know I love the car and if I had shorter legs I would be fine with it. But with the Maverick and Galaxie and Mustang King Cobra II (which seems to fit me better), the Pinto is going :(

It's such a cute little car!
Vehicles:

- 1972 Plymouth Duster (To be a Pro Street)
- 1973 Ford Pinto wagon (registered ride 195)
- 1976 Mustang II mini-stock
- 1978 Mustang King Cobra II
- 1979 Ford Pinto Runabout
- 1986 Chevy K5 Blazer
- 1997 Suzuki Marauder

FORD: Federal Ownership Respectfully Denied

jeremysdad

I was hoping it was done, and you would be reporting back with great results!!!

Good luck!

dianne

The u-joints are bad in mine, so needed replacing. But the car is going now anyway...
Vehicles:

- 1972 Plymouth Duster (To be a Pro Street)
- 1973 Ford Pinto wagon (registered ride 195)
- 1976 Mustang II mini-stock
- 1978 Mustang King Cobra II
- 1979 Ford Pinto Runabout
- 1986 Chevy K5 Blazer
- 1997 Suzuki Marauder

FORD: Federal Ownership Respectfully Denied

jeremysdad

A little late, being Wednesday (Hope they got it fixed for you with the U-joint replacement!), but when my Dad was teaching me 'the ropes' oh so long ago, he summed vibrations up like this:

U-joint/driveline issues, you feel though the seat. (Rear wheel drive vehicles)
Front suspension/tire issues, you feel in the steering wheel.
Brake issues, you feel in the brake pedal.
Clutch issues, you feel in the clutch pedal. (Different with newer hydraulic clutches???)

They're good guidelines, but not perfect. I have added my own edits over the years. Before diving into replacing U-joints/driveline parts, I'll rotate tires to see if the vibration moves (I have found that rear tire problems come through the seat, as well, so rotating tires lets me see if the vibration comes through the steering wheel).

But, I'm cheap. I like to do free things before buying parts or laying on my back in the driveway. :) lol

dianne

Vehicles:

- 1972 Plymouth Duster (To be a Pro Street)
- 1973 Ford Pinto wagon (registered ride 195)
- 1976 Mustang II mini-stock
- 1978 Mustang King Cobra II
- 1979 Ford Pinto Runabout
- 1986 Chevy K5 Blazer
- 1997 Suzuki Marauder

FORD: Federal Ownership Respectfully Denied

74 PintoWagon

Glad to hear it's an easy fix.
Art
65 Falcon 2DR 200 IL6 with C4.

Pinto5.0

Quote from: dianne on March 07, 2014, 08:26:44 PM
U-joints was the issue he said. He'll replace them on Wednesday! :-D

Thanks guys!!!

That's good to hear. Hopefully that's the end of it.
'73 Sedan (I'll get to it)
'76 Wagon driver
'80 hatch(Restoring to be my son's 1st car)~Callisto
'71 half hatch (bucket list Pinto)~Ghost
'72 sedan 5.0/T5~Lemon Squeeze

dianne

U-joints was the issue he said. He'll replace them on Wednesday! :-D

Thanks guys!!!
Vehicles:

- 1972 Plymouth Duster (To be a Pro Street)
- 1973 Ford Pinto wagon (registered ride 195)
- 1976 Mustang II mini-stock
- 1978 Mustang King Cobra II
- 1979 Ford Pinto Runabout
- 1986 Chevy K5 Blazer
- 1997 Suzuki Marauder

FORD: Federal Ownership Respectfully Denied

amc49

You can chunk a driveshaft weight to do it or simply spit out a u-joint clip. Put clip (find one) back in after pushing cup back tight and done.

Wouldn't hurt to jack car up to spin wheels, any tire problems generally show pretty quick in rotation.

You people will love this one. I haven't balanced tires on the last 3 cars now, I use the tires with no balance at all. It requires the wheels to be known fairly true, they must be known to be pretty close to neutral before you start doing it. Meaning no really big weights used to balance them. Newer tires now rarely need lots of weight from off neutral. The tire WILL wear wonky but I drive FWD cars and rotate all older fronts to the rear, the new ones going on front only. I buy only pairs, never all 4 at once. FWD cars will ALWAYS wear tires out of round on the back because no heavy rear end there any longer, they begin to rise off the ground in oscillation and the oddball wear starts. Balancing does nothing for that issue except to ever so slightly slow it down. Doing that I still get like 95% of the wear tire is rated for. Here in Texas the tire will then heatcrack before I can wear it out and that's what forces replacement of most of them if not outright damage from all the crap construction workers let fall out of trucks to tear up tires. You can tell the no balance but only as a almost imperceptible roughness that is easy to overlook. It does not generally show until like 70+ and my cue to slow down. I've seen one tire in the last 16 or so bought that needed later to be balanced, that one tire was wonky and showed up instantly and easy to find it. Went back to no balance after it was burned out. I quit rotation as well, the back wearing wonky just makes you put oddball backs on the front doing so. FWD cars drive impeccably with really good tires on front, the backs can be garbage. The way I do it requires little upkeep and runs forever. That's on FWD ONLY though. Still, it saves lots of money.

I haven't aligned a car in 35 years either, do it all myself but enough thread jacking.....................

dianne

Quote from: Wittsend on March 06, 2014, 08:20:07 PM
If you are stepping off the gas and the vibration stops it is very doubtful it is your tires or their balance.

A driveshaft problem should not cause the tires, and thus the steering wheel to shake (though it may pick up vibrations through the car structure).  A driveshaft issue would cause the whole car to resonate.  If you have a means to safely get under the car you can check for bad U-Joints.  They should not slide side to side or appear to rock in their cups.  Who knows, the nuts on the U-Bolts might just be loose.

  To test the driveshaft attach a piece of chalk to a board. While holding the board firm to the underside of the car have someone rotate a rear tire and slowly move the board towards the driveshaft. The chalk mark will show if the shaft is bent.  Check the U-Joints first because they can cause the same problem.  If the problem wasn't there before, you haven't high centered the car on a large rock, or accidentally put a floor jack under the driveshaft and then lifted it - your driveshaft itself is probably ok.

My guess it that the U-Bolts at the rear are loose or one of (maybe both) U-Joints are bad.

Thanks! Dave said that he had the driveshaft checked for balance before he put it in the car. So I'm guessing it must be the u-joints... Thanks!!!
Vehicles:

- 1972 Plymouth Duster (To be a Pro Street)
- 1973 Ford Pinto wagon (registered ride 195)
- 1976 Mustang II mini-stock
- 1978 Mustang King Cobra II
- 1979 Ford Pinto Runabout
- 1986 Chevy K5 Blazer
- 1997 Suzuki Marauder

FORD: Federal Ownership Respectfully Denied

Wittsend

If you are stepping off the gas and the vibration stops it is very doubtful it is your tires or their balance.

A driveshaft problem should not cause the tires, and thus the steering wheel to shake (though it may pick up vibrations through the car structure).  A driveshaft issue would cause the whole car to resonate.  If you have a means to safely get under the car you can check for bad U-Joints.  They should not slide side to side or appear to rock in their cups.  Who knows, the nuts on the U-Bolts might just be loose.

  To test the driveshaft attach a piece of chalk to a board. While holding the board firm to the underside of the car have someone rotate a rear tire and slowly move the board towards the driveshaft. The chalk mark will show if the shaft is bent.  Check the U-Joints first because they can cause the same problem.  If the problem wasn't there before, you haven't high centered the car on a large rock, or accidentally put a floor jack under the driveshaft and then lifted it - your driveshaft itself is probably ok.

My guess it that the U-Bolts at the rear are loose or one of (maybe both) U-Joints are bad.

dianne

Well, my mechanic is going to look at it this week. It's probably those things your mentioned and I will mention them to him also :)
Vehicles:

- 1972 Plymouth Duster (To be a Pro Street)
- 1973 Ford Pinto wagon (registered ride 195)
- 1976 Mustang II mini-stock
- 1978 Mustang King Cobra II
- 1979 Ford Pinto Runabout
- 1986 Chevy K5 Blazer
- 1997 Suzuki Marauder

FORD: Federal Ownership Respectfully Denied

Pinto5.0

I've had new tires break a belt. It's easy to spot. I'd check suspension bushings too while you're at it.
'73 Sedan (I'll get to it)
'76 Wagon driver
'80 hatch(Restoring to be my son's 1st car)~Callisto
'71 half hatch (bucket list Pinto)~Ghost
'72 sedan 5.0/T5~Lemon Squeeze

Rob3865

In general there are two types of vibration in vehicles. High frequency like a heard of pissed off bumble bees such as drive shaft, u joints or axle bearings and low frequency, like an out of balance, out of round tire, bent wheel or axle shaft. You need to determine which frequency you have and that will help zero in on it. Most of the time tire, wheel and axle problems (low frequency) will show up as a vibration through the seats, floor and steering wheel, if on the front. Generally, axle bearings, u joints or drive shaft imbalance or damage will show up as a "buzz" at a much higher frequency. Hope that helps.

dianne

The tires were new when I got it. Another thing that I noticed when driving around 35 I have vibration and then when I step off the gas it stops. I'm thinking that one is the pulley, I can replace that easily. At 50 and over I'm white knuckling this car and if I step off the gas it's still bad. I'm thinking that the wheel bearings could be it. This is the first time I've driven it over 40 or 50.
Vehicles:

- 1972 Plymouth Duster (To be a Pro Street)
- 1973 Ford Pinto wagon (registered ride 195)
- 1976 Mustang II mini-stock
- 1978 Mustang King Cobra II
- 1979 Ford Pinto Runabout
- 1986 Chevy K5 Blazer
- 1997 Suzuki Marauder

FORD: Federal Ownership Respectfully Denied

Pinto5.0

Aerostar driveshaft is a bolt in. It's not the issue unless it was damaged. It could be a u-joint, tire, wheel bearing, etc. The 1st thing I would check is tires for a broken belt.
'73 Sedan (I'll get to it)
'76 Wagon driver
'80 hatch(Restoring to be my son's 1st car)~Callisto
'71 half hatch (bucket list Pinto)~Ghost
'72 sedan 5.0/T5~Lemon Squeeze