44 Guests, 0 Users

Author Topic: 4 Speed Transmission length  (Read 167 times)

0 Members and 1 Guest are viewing this topic.

Offline Empty Pockets

  • Pinto Driver
  • *
  • Posts: 2
  • FeedBack: +0/-0
  • Another Pinto Driver

  • Total Badges: 1
    Badges: (View All)
    Topic Starter
4 Speed Transmission length
« on: September 25, 2020, 09:51:28 AM »
Hello ,I'm new to this and have a question regarding a project I'm building. I have a 2.3 with a C-3 behind it in my Belly Tanker. I'm in the process of final assembly and was wondering if anyone knew the overall length of a 4 speed manual transmission. I have the engine and trans mounted in the chassis but would like to make it  a manual  but due to space limitations I can't get any additional length if swapping out the C-3,my driveshaft is only 5 7/8 long and according to the math can't be any shorter to allow for suspension movement. I originally was going with a 5 speed (I should have stuck with that plan) but put in the C-3 due to it being small and lite. The engine is stock rebuild with a header and Holley carb so the C-3 would probably live behind it but I was going to make some performance upgrades to the engine prior to final assembly. Any help in what overall length of a standard transmission conversion would be greatly appreciated. I have searched around here and haven't found anything, but I probably aren't searching it correctly  :(.

Offline Wittsend

  • Pinto Master
  • *****
  • Posts: 2237
  • FeedBack: +241/-0

  • Total Badges: 8
    Badges: (View All)
    Tenth year Anniversary Mobile User Topic Starter Poll Voter 1000 Posts Linux User Windows User Fifth year Anniversary
Re: 4 Speed Transmission length
« Reply #1 on: September 25, 2020, 12:59:50 PM »
 The Pinto 4 speed is referred to as the F O G  Transmission. I took a quick check on line but couldn't find the length. I did an early (73) Pinto swap with a 2.3/T-5, 5 speed.

73 Pinto C-4, 6-3/4" rear
to
88 Turbo Coupe T-5, 8" rear end

I was able to reuse the original driveshaft. I mention this because there doesn't seem to be too much difference in the dimensions. I'd thing that the 8" rear would have projected slightly more forward than the 6-3/4". IF that was the case then the T-5 MIGHT have been slightly shorter in length than the C-4 (which I assume is a similar length to the C-3).  Do note that I'm referring to the T-5 for the 2.3. The T-5's for the Mustang has a shorter input shaft.

Hopefully someone can give you the full dimensions (including the bellhousing) but my information might incline you towards the 5 speed that I assume the overdrive would be beneficial for the purpose of a Tanker.

Offline 65ShelbyClone

  • Pinto Sr. Member
  • ****
  • Posts: 720
  • FeedBack: +139/-0

  • Total Badges: 7
    Badges: (View All)
    Fifth year Anniversary Topic Starter Signature Poll Voter Mobile User Linux User Windows User
Re: 4 Speed Transmission length
« Reply #2 on: September 26, 2020, 02:12:11 PM »
Joe Escobar put a tape measure on one toward the bottom of the page here: http://www.joe-escobar.com/pinto.html

Looks like 30.125".

An option you might look into is adapting a Jeep T5. Those gearboxes have a very short tail section. There's also the T9 five-speed which is based on the FOG and is a direct swap for it. They were used in the '85-89 Merkur XR4Ti. The problem is that they're hard to find these days. They're not as strong as a T5, but would do well behind a naturally-aspirated 2.3.

What other performance upgrades are you going to do?
 
'72 Runabout - 2.3T, T5, MegaSquirt-II, 8", 5-lugs, big brakes.
'68 Mustang - Built roller 302, Toploader, 9", etc.

Offline Empty Pockets

  • Pinto Driver
  • *
  • Posts: 2
  • FeedBack: +0/-0
  • Another Pinto Driver

  • Total Badges: 1
    Badges: (View All)
    Topic Starter
Re: 4 Speed Transmission length
« Reply #3 on: September 26, 2020, 03:35:54 PM »
Well thanks for the info. I looked at the measurements Joe had. I think I'm going to go and look around at Pick A Part and see what I can find. I would like to get something I could get parts for easily? I have seen guys running the 2.3 and 4 speed set up at local asphalt tracks Mini-stocks in Pintos and they didn't seem to blowing them up (as far as I know). that was the only reason. I have a full rebuilt C-3 with Turbo convertor set up in it know which will probably be Ok with a reasonably stock engine I have in it now - it made life easier (?) but now I'm ready to do the final assembly on it I really want 3 pedals in it........... I'm just limited on length which I suppose I could always modify a tail shaft and housing. As far as an overdrive I figured with the 3.30 rear gears I was going to rely on Shear RPM for my overdrive. I should have mentioned I'm building this to run on the street. :-\