Technical Tips > Transmissions - Differentials
C3 diff/axles
metalhead:
So I've been pulling down my rear suspension to fit new bushes and shocks (79 Corvette)... And I have a heap of play in the side yokes on the diff. A bit of reading suggests I'll almost certainly need a diff rebuild and new side yokes. :tears: Anyone had this done and have suggestions as to where to source parts or who to do the diff rebuild? I could probably have a crack at it I suppose, but I haven't rebuilt a diff centre before.
Help?!
Thanks in advance,
Andrew.
metalhead:
I have .037" play on one side, and .061" on the other. It looks like a lot more!
bfit:
If your only using the car on the road and it's not leaking,
Leave it alone .
The spec is 0.004" to 0.008"
A 1/16" ( 0.00625") is quit common
The play is caused by wear in the clutchs Packs in the diff
Bfit
metalhead:
Really? That would be good news! Elsewhere I read anything over. 025" was bad here: http://www.corvetteforum.com/forums/c3-tech-performance/2986941-differential-side-yoke-play.html Also, do you have an extra 0 in your spec figures? Because .061" is a lot more than .008"?
It does leak a bit, doesn't drip but is always covered in oil. I will do some club motorsport (hillclimbs/track days) with it. I thought being effectively the upper control arm that I'd want it as close to 0 as possible?
bfit:
--- Quote from: metalhead on October 10, 2015, 08:31:18 PM ---Really? That would be good news! Elsewhere I read anything over. 025" was bad here: http://www.corvetteforum.com/forums/c3-tech-performance/2986941-differential-side-yoke-play.html Also, do you have an extra 0 in your spec figures? Because .061" is a lot more than .008"?
It does leak a bit, doesn't drip but is always covered in oil. I will do some club motorsport (hillclimbs/track days) with it. I thought being effectively the upper control arm that I'd want it as close to 0 as possible?
--- End quote ---
Agree
You don't want the rear steering you in a direction your not pointing the front.
You cound drop the rear of the diff down , take the rear cover off and turn the circlips over to see how much reduction you get in end play.
I had 3 mm in one side, when I fitted original shafts to new diff , I had 0.004 and 0.006" end play.
What im saying new shafts won't fix the problem.
Bfit
Check this out if you want the rear end to work for you .
http://www.ridetech.com/store/1968-1979-c3-corvette-rear-strongarm-system.html
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