Need advice: C5Z ring and pinion
Safety Car
Joined: Nov 2013
Posts: 3,579
Likes: 1,108
From: Ex DPRK, now just N of Medford, OR
Nothing magic inside a C5 diff.
If you were building diffs all day from piles of new parts, the setup tools would sure make that easier.
But if you're swapping gears or just changing bearings on a one-off job, care and patience are the important tools.
I've done a few for myself... they took forever, and I got to stink like 90wt the whole time.
None of the shops I worked for would do one, and I wouldn't take one on for a customer. Surefire money loser!
It is a specialty. Best to send them out.
If you were building diffs all day from piles of new parts, the setup tools would sure make that easier.
But if you're swapping gears or just changing bearings on a one-off job, care and patience are the important tools.
I've done a few for myself... they took forever, and I got to stink like 90wt the whole time.
None of the shops I worked for would do one, and I wouldn't take one on for a customer. Surefire money loser!
It is a specialty. Best to send them out.
Drifting
Joined: Jan 2008
Posts: 1,722
Likes: 138
From: Florida
St. Jude Donor '09
That was my point to the OP, do not allow the local shop to attempt repairing it unless they have the J-44678 tool set.
Safety Car
Joined: Nov 2013
Posts: 3,579
Likes: 1,108
From: Ex DPRK, now just N of Medford, OR
Thread Starter
Le Mans Master
Joined: Jul 2000
Posts: 7,639
Likes: 326
From: Greenville SC
I wouldn't be in a giant rush to replace to R&P just for finding crap on the magnet...
Yes, check the LSD function. If it's failed, then take it apart and look.
If not, put fresh fluid in it. Does it make noise? No? Good to go.
Yes?
Well crap, I gambled $30 worth of fluid against the cost of a new diff.
As for needing all of the GM special tools to properly set up the R&P... No. But take it to a shop that specializes in diffs!
Most shops won't touch one, and send them out anyway. It's a specialty, and unless you do them often, it's a great way to lose money.
A 4x4 shop is a good place to start. They swap gears regularly, and if they don't build them, at least they'll know who does.
Yes, check the LSD function. If it's failed, then take it apart and look.
If not, put fresh fluid in it. Does it make noise? No? Good to go.
Yes?
Well crap, I gambled $30 worth of fluid against the cost of a new diff.
As for needing all of the GM special tools to properly set up the R&P... No. But take it to a shop that specializes in diffs!
Most shops won't touch one, and send them out anyway. It's a specialty, and unless you do them often, it's a great way to lose money.
A 4x4 shop is a good place to start. They swap gears regularly, and if they don't build them, at least they'll know who does.
I have new fluid in it, and I asked about driving it, and he said probably fine. I'm thinking it will only get worse, and may create a larger problem in time.
Maybe I drive it some, and then take it in and if more sludge, I have them open it up, but if nothing new, I keep driving it, and periodically check and have fluid changed?
Test LSD, so jack up rear, and both wheels should spin in same direction, correct? If bad, one wheel won't spin?
Thread Starter
Le Mans Master
Joined: Jul 2000
Posts: 7,639
Likes: 326
From: Greenville SC
https://youtu.be/R0KlixfpHuc?si=dYXTKRYd3THQNJAP
This shows the process. If a guy has set up gears before, you could do this yourself.
This shows the process. If a guy has set up gears before, you could do this yourself.
Melting Slicks
Joined: Dec 2018
Posts: 2,677
Likes: 1,397
From: Orange County, CA
You can check LSD condition pretty easily: 1) jack up just one rear corner, other on the ground; 2) trans in neutral; 3) spin the elevated wheel, if the wheel spins by hand or with less than ~30-50 ft-lbs of torque applied then the belleville springs / clutch packs are toast.
