DIY Transmission Re-Build Tips

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Aug 7, 2023 | 11:40 PM

#271

Dave W.

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From: SF Bay Area

Quote:

Originally Posted by AWD96

@Dave W. ,

Are you referring the the shim that was in the trans before? Just for clarity sake I am trying to get the end play right on the input due to changing the shaft itself. Everything I read shows the solder used to check clearance as being crushed after torqueing the case together and using that as a reference but like I said, solder is intact like it never makes contact

Most of the stock shims I took out were around .058". Add a few thou freeplay and the typical gap was over .062". You need to find solder that's thicker than .065".

Aug 8, 2023 | 09:25 PM

#272

AWD96

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From: Winchestertonfieldville (Rochester, NY)

Quote:

Originally Posted by Dave W.

Most of the stock shims I took out were around .058". Add a few thou freeplay and the typical gap was over .062". You need to find solder that's thicker than .065".

@Dave W. Thank you for the info! I'm not surprised on the shims being close. I've taken apart 2 transfer cases that had the same exact pinion shims in them.

My trans was rebuilt by a reputable shop prior to me learning to do it on my own so the shim in there likely isn't what it came with but I replaced my input shaft hence wanting to check tolerances

Oct 21, 2024 | 05:46 PM

#273

AWD96

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From: Winchestertonfieldville (Rochester, NY)

Bringing this back from the depths!

New mission this winter is to install a Liberty Face Plated 1/2 gear and do a PAR billet double synchro 4th gear. 700whp on STM's dyno is too much for a synchro trans and I want to build a hybrid.

Has anyone built their own trans with either Liberty faceplated gears and/or the PAR straight cut gears?

Mar 9, 2025 | 03:44 PM

#274

AWD96

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From: Winchestertonfieldville (Rochester, NY)

BUMP!

Looking for input from anyone who may have built their own trans with faceplated gears and if they did anything outside of the norm when assembling it?

Mar 10, 2025 | 08:44 AM

#275

LetsGetThisDone

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From: Las Vegas

Quote:

Originally Posted by AWD96

BUMP!

Looking for input from anyone who may have built their own trans with faceplated gears and if they did anything outside of the norm when assembling it?

Just set the bearings preload on the output shaft and diff on the right side, and the clearance on the input shaft on the loose side of spec.

Mar 10, 2025 | 04:05 PM

#276

AWD96

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From: Winchestertonfieldville (Rochester, NY)

Quote:

Originally Posted by LetsGetThisDone

Just set the bearings preload on the output shaft and diff on the right side, and the clearance on the input shaft on the loose side of spec.

Have you done the rebuild yourself before? That's the first time I've heard of using the looser end of spec for a build.

Also- clarify the right side preload if you don't mind

Mar 10, 2025 | 06:55 PM

#277

LetsGetThisDone

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From: Las Vegas

Quote:

Originally Posted by AWD96

Have you done the rebuild yourself before? That's the first time I've heard of using the looser end of spec for a build.

Also- clarify the right side preload if you don't mind

The input shaft is on ball bearings, not tapered roller bearings. The more room it has to not allow thrust loads to effect the bearings, the better.