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Author Topic: My pinto rear end ratio change and posi unit  (Read 2830 times)

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Offline pinto_one

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My pinto rear end ratio change and posi unit
« on: January 27, 2017, 02:28:16 PM »
Just got in some new parts for my pinto , new 3.40 gear set and a yukon HD posi unit along with a overhaul bearing kit , thought about posting the steps on assembly of the third member if anyone thinks it a good idea , Later Blaine
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Offline dick1172762

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Re: My pinto rear end ratio change and posi unit
« Reply #1 on: January 27, 2017, 04:17:34 PM »
Great idea! Go for it!
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Offline TIGGER

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Re: My pinto rear end ratio change and posi unit
« Reply #2 on: January 27, 2017, 06:47:22 PM »
Yes please, I am currently struggling thru an 8.8 rebuild.  Might learn something new from you LOL.....
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Offline 74 PintoWagon

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Re: My pinto rear end ratio change and posi unit
« Reply #3 on: January 29, 2017, 06:25:16 AM »
Great idea, go for it..
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Offline pinto_one

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Re: My pinto rear end ratio change and posi unit
« Reply #4 on: February 04, 2017, 12:09:34 PM »
Well got some progress today, took one of my spare third member from a rear end and cleaned it up , along with the axles , installing new bearings there also along with the seals ,  bead blasted and painted up the unit and installed the pinnion nose bearing in the case , mounted the ring gear to theposi unit with new bolts , a dab of lock tight on each and torque to 60LBS , droped the carrier into place and and install caps , they also torque to 60 also , would have done more but forgot the pinnion shims at home so guess it will have to wait
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76 Pinto sedan V6 , 79 pinto cruiser wagon V6 soon to be diesel or 4.0

Offline 74 PintoWagon

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Re: My pinto rear end ratio change and posi unit
« Reply #5 on: February 07, 2017, 07:09:04 AM »
Looks good.
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Offline pinto_one

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Re: My pinto rear end ratio change and posi unit
« Reply #6 on: February 08, 2017, 08:05:57 PM »
Tomorrow I will be finishing it up and posting more photos , hopefully this weekend I will install it  ;D
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Offline pinto_one

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Re: My pinto rear end ratio change and posi unit
« Reply #7 on: February 09, 2017, 08:42:57 AM »
got it all together ,  installed new pinnion bearings and a new crush sleave , which is a must for correct pinnion preload , which 10 to 14 inch pounds to turn the pinnion , sorry for fuzzy photo there , but you get the idea ,
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76 Pinto sedan V6 , 79 pinto cruiser wagon V6 soon to be diesel or 4.0

Offline pinto_one

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Re: My pinto rear end ratio change and posi unit
« Reply #8 on: February 09, 2017, 08:53:17 AM »
after I got the pinnion tourqe done with I reinstalled the carrrer and shimed the pinnion gear to have the right gear contact , the pattern will end up like this when you have the back lash right and the right shim in place , after I recheck all the bolts for correct tourqe ,  the five pinnion bolts (3/8 ) 45 ft lbs ,  carrer bearing caps 60 ft lbs ,  the ring gear also 60 lbs ,  now all complete ,  next I will post changing of the axle bearings ,  next project is assmbling a cust 520 cubic inch 6 cylinder aircraft engine ,
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76 Pinto sedan V6 , 79 pinto cruiser wagon V6 soon to be diesel or 4.0
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