Weird problem maybe diff?
Thread Starter
Instructor
Joined: Jan 2016
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Weird problem maybe diff?
I had my trans and diff rebuilt a few months ago. Since I had it rebuilt the pass side dips a little further than the ds. Now it's even worse if I punch it it feels like the back is about to fall off the car the whole back end shakes and the back end is sliding left to right. I though I had a loose wheel. Any idea if that sounds like a diff?
Le Mans Master
Joined: Sep 2014
Posts: 5,278
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From: Kelowna BC
I had my trans and diff rebuilt a few months ago. Since I had it rebuilt the pass side dips a little further than the ds. Now it's even worse if I punch it it feels like the back is about to fall off the car the whole back end shakes and the back end is sliding left to right. I though I had a loose wheel. Any idea if that sounds like a diff?
I am guessing a suspension item wasn't reassembled right, but that is a wild guess.
Thread Starter
Instructor
Joined: Jan 2016
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It old dips while accelerating.
When you give it enough gas for the rear end to squat down.
Now when you give it enough gas for that to happen it feels like one side gets power, then traction control hits, the other side gets power, repeat. This causes the back end of the car to slide back and forth. Then when I let off the gas the back end kind of bounces.
When I removed the rear subframe the only suspension component I removed besides the bolts to the frame was the shocks, I replaced them with 04z shocks. I checked all of the bolts and they appear tight.
When you give it enough gas for the rear end to squat down.
Now when you give it enough gas for that to happen it feels like one side gets power, then traction control hits, the other side gets power, repeat. This causes the back end of the car to slide back and forth. Then when I let off the gas the back end kind of bounces.
When I removed the rear subframe the only suspension component I removed besides the bolts to the frame was the shocks, I replaced them with 04z shocks. I checked all of the bolts and they appear tight.
Thread Starter
Instructor
Joined: Jan 2016
Posts: 127
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No noises. I do have some gopros, would it help if I mounted some to the back of the car or maybe even underneath it? There is an empty street in my neighborhood I could safely take a video on if that would help.
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Melting Slicks
Joined: Sep 2011
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From: Appleton WI
Make sure the rear cradle bolts are tight. A video would also be helpful. If you have a limited slip differential, you shouldn't be transferring power from side to side once power is being applied to both wheels. If it is, there is likely something wrong with the clutches in the differential.
Tech Contributor
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Make sure the rear cradle bolts are tight. A video would also be helpful. If you have a limited slip differential, you shouldn't be transferring power from side to side once power is being applied to both wheels. If it is, there is likely something wrong with the clutches in the differential.
For a quick test to determine if the limited slip clutches are functional and working correctly, try this:
Jack up ONE REAR WHEEL. The other is on the ground. Trans out of gear or in neutral and the E-Brake OFF!
Attempt to ROTATE the wheel that is off the ground. It should have significant resistance to rotation but break loose as if the E brake was on slightly. You should see approx. 40-50 ft/lbs resistance to rotation before it rotates on a well used differential. A new rebuilt diff will be significantly higher (approx. 100 ft/lbs)
Repeat on the other side of the car
BOTH wheels should break loose at very close to the same torque value!!!
Thread Starter
Instructor
Joined: Jan 2016
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It's a c5z diff with with c6z parts in it. I'll take a video tonight. The cradle bolts appeared tight I'll take a wrench to them.
I have 3 gopros what will be the best placement, roof facing back, over a wheel and on the rear bumper facing under the car?
I have 3 gopros what will be the best placement, roof facing back, over a wheel and on the rear bumper facing under the car?
Last edited by seand03; Oct 27, 2016 at 02:33 PM.
Le Mans Master
Joined: Sep 2014
Posts: 5,278
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From: Kelowna BC
I'd do BC's test before camera work, just me maybe.