Pinion shims
#1
Member
Thread Starter
Join Date: Mar 2008
Location: Mocksville, North Carolina
Posts: 134
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1992 Camaro
Engine: 350 .030 over 298 cam 9.1 Flat tops
Transmission: T5 swap complete
Axle/Gears: 3.73 posi the 4.10s are history
Pinion shims
Ok I am building my 3.73 posi rearend. I was curious since I dont have a press for the pinion bearing I was wondering if it was possible to shim the pinion from under the rear pinion bearing race?
#2
Supreme Member
iTrader: (14)
Join Date: Aug 2006
Location: Central NJ
Posts: 12,654
Likes: 0
Received 47 Likes
on
45 Posts
Car: 86 Trans Am, 92 Firebird
Engine: 408 sbc, 3.1L of raw power
Transmission: TKO600, T5
Axle/Gears: Moser 9", 3:70 trutac, 3:23 torsion
Re: Pinion shims
no, you have to shim the pinion bearing
#3
Member
Thread Starter
Join Date: Mar 2008
Location: Mocksville, North Carolina
Posts: 134
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1992 Camaro
Engine: 350 .030 over 298 cam 9.1 Flat tops
Transmission: T5 swap complete
Axle/Gears: 3.73 posi the 4.10s are history
Re: Pinion shims
Ok I will work it that way, I used my original pinion shims to get a starting point. The original shim was a single shim of .070 which is way to much. What would be a good starting point. The reason I asked about placement of the shims is due to an article I read that makes it sound like you could shim from either spot.
http://darcinjected.com/diff_inst.htm#Tool%20List
http://darcinjected.com/diff_inst.htm#Tool%20List
#4
Supreme Member
Join Date: Dec 2003
Location: Newark, DE
Posts: 2,391
Likes: 0
Received 0 Likes
on
0 Posts
Car: '86 Camaro, '02 WRX, '87 K5, '67
Engine: 350 TPI, 2.0turbo, 383 in the works, 289-4BBL, 232, A-head 4-cylinder
Transmission: T56, 5-speed, 700R4, C4, T176, semi-auto 2-speed
Axle/Gears: 3.73, 3.90, 4.88, 3.55, 3.54, 7.00
Re: Pinion shims
I always start with a .030" shim if I'm setting up a rear that was taken apart and I didn't know what shim was under the bearing stock. That's a good starting place.
I would suggest getting a spare bearing and reaming the ID with a die gringer until it will slip fit on the pinion. Then you can go through the setup to get the pattern right and just press a new bearing onto the pinion for final assembly. Trying to press the bearings on and off can often destroy them even with good clamshells and a lot of press experience. Don't use an old bearing for the test fitting. It will be worn and could give you false readings. You have to use a new bearing and get it to slip fit. If you've done as many as I have you end up with a collection of these set-up bearings.
I would suggest getting a spare bearing and reaming the ID with a die gringer until it will slip fit on the pinion. Then you can go through the setup to get the pattern right and just press a new bearing onto the pinion for final assembly. Trying to press the bearings on and off can often destroy them even with good clamshells and a lot of press experience. Don't use an old bearing for the test fitting. It will be worn and could give you false readings. You have to use a new bearing and get it to slip fit. If you've done as many as I have you end up with a collection of these set-up bearings.
#5
Member
Thread Starter
Join Date: Mar 2008
Location: Mocksville, North Carolina
Posts: 134
Likes: 0
Received 0 Likes
on
0 Posts
Car: 1992 Camaro
Engine: 350 .030 over 298 cam 9.1 Flat tops
Transmission: T5 swap complete
Axle/Gears: 3.73 posi the 4.10s are history
Re: Pinion shims
Ok I will start with the .030. Another thing I was considering is Retech 4111 spacer that is used instead of the original crush sleeve. I would figure I would go through many crush sleeves getting the RE set up.
#6
Re: Pinion shims
First of all, never use the crush spacer or any spacer when doing the trial assemblies. You only need the spacer on the final assembly. Also, use the old nut for trial assemblies and save the new nut for the final. Next, yes you can shim it behind the bearing race. All of the Dana 44 and 60 rear ends are shimmed behind the race. It's easier to do it behind the bearing, but you can do it behind the race if you want. You will have to get the right size shims to do it this way.
Thread
Thread Starter
Forum
Replies
Last Post
[ON] 9 Bolt Axles Partout
6speedIROC
Engine/Drivetrain/Suspension Parts for Sale
16
03-15-2023 08:33 PM
dimented24x7
Transmissions and Drivetrain
7
09-17-2015 06:58 AM