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Differential axle yoke tolerance?????
Posted by: capnqball ()
Date: November 10, 2017 10:11AM

In the process of installing transaxle and checked the in-out of the axle yokes and found a lot of slop. What is the acceptable in-out tolerance? This is on a 66 Saginaw 4 spd unit.

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Re: Differential axle yoke tolerance?????
Posted by: MattNall ()
Date: November 10, 2017 10:15AM

IIRC 1/8" 0.125" is common.





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Re: Differential axle yoke tolerance?????
Posted by: gnvair ()
Date: November 10, 2017 10:40AM

The posi differentials will typically have hardly any on the side with the clutches

Lee J

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Re: Differential axle yoke tolerance?????
Posted by: MattNall ()
Date: November 10, 2017 10:56AM

And many have machined the parts to eliminate it...mainly racers..





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Re: Differential axle yoke tolerance?????
Posted by: capnqball ()
Date: November 10, 2017 11:03PM

Thanks MattNall for the timely response.

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Re: Differential axle yoke tolerance?????
Posted by: JimBrandberg ()
Date: November 11, 2017 05:36AM

It's fairly common and disconcerting. It's a big job to do something about it. In use, I believe there's usually inward pressure on the axle except at droop when that tire isn't doing much anyway. I could be wrong and I'd be happy to read more opinions and technical about it.
Jim Brandberg
Isanti, MN
CorvairRepair.com

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Re: Differential axle yoke tolerance?????
Posted by: Bob Helt ()
Date: November 11, 2017 04:16PM

This subject was pretty well covered some 10 years ago. The clearance is built-in so that when the bolt thru the yoke is tightened there will be an internal clearance that typically is 1/16" to 1/8". There is no known spec for this designed-in clearance and it will cause no harm or problems othewise.

To remove or decrease the clearance, you must disassemble the differential (by the way this is only on LM (1965-69 differentials That have this clearance). and remove the two nuts that the yoke bolts mate with. Then braze the ends of the nuts to build-up their thickness (after measuring the current clearance to determine the desired amount). It's a bit hit or miss.

Bob Helt

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Re: Differential axle yoke tolerance?????
Posted by: jjohnsonjo ()
Date: November 11, 2017 04:25PM

Clarks used to have a kit, you had to grind them down, trial and error.

J.O.

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Re: Differential axle yoke tolerance?????
Posted by: v8vair ()
Date: November 11, 2017 05:59PM

The clearance is irrelevant.
The design always has the half shaft pushing inward.
A lot of people go through a lot of trouble for nothing.
Look what holds a C3 Corvette yoke in with the same design, a Snap ring.
Mike

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