rear end bouncing
#1
New Member
Thread Starter
rear end bouncing
I installed new axles and wheel bearings and ever since then the z bounces a lot in the rear and shakes a lot. It did throw a slip warning once while driving straight. I am a bit confused because I lifted the rear end and drove in first and i can see the dif and passenger axle bouncing up and down. I tested with the axles disconnected and the diff does not bounce at all. however when rear is in air with axles disconnected or connected I always get a slip light once rpms are above about 1500 rpms I give it gas and it shakes and cuts power and throws the slip light. I was wondering what this could be because I don't think it should be slipping with car in the air.
#2
New Member
iTrader: (4)
That's very odd. Are your ABS sensors at the diff output shafts installed and connected up? Any damage to them? What type of axles & bearings did you use? Some pictures of the installation would help. There shouldn't be any bouncing unless the axles are binding and or damaged.
Cheers!
-Icer
Cheers!
-Icer
#3
New Member
Thread Starter
I believe the sensor are fine I used a scanner and they seem to be outputting okay the rears match when going in a straight line. I installed trakmotive axles off rockauto and Hayaku wheel bearings from z1. Ill try to take some pictures later.
#6
New Member
iTrader: (4)
Just a thought, but did you compare the lengths of the new axles with the originals? One is supposed to be longer than the other. I believe the shorter axle is on the driver's side and the longer one is passenger side. Just making sure you didn't get two axles that are equal length or their positions reversed.
-Icer
-Icer
#7
New Member
Thread Starter
Just a thought, but did you compare the lengths of the new axles with the originals? One is supposed to be longer than the other. I believe the shorter axle is on the driver's side and the longer one is passenger side. Just making sure you didn't get two axles that are equal length or their positions reversed.
-Icer
-Icer
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#8
New Member
iTrader: (4)
I double checked some photos I have from when I swapped my diff and re-painted my axles. The driver's side (left side) should have the shorter axle and the passenger side (right side) should have the longer axle. Assuming the axles and bearings are correct, then it might be that you have a problem with the Diff. What trim level is your Z?
Edit: Have you fully torqued your axle nuts down yet? You mentioned you haven't driven the car, so you could have play from the nuts not being torqued, best practice is to do this with wheels on the ground (center caps removed) if your e-brake can't handle it.
-Icer
Edit: Have you fully torqued your axle nuts down yet? You mentioned you haven't driven the car, so you could have play from the nuts not being torqued, best practice is to do this with wheels on the ground (center caps removed) if your e-brake can't handle it.
-Icer
Last edited by icer5160; 08-18-2023 at 06:01 PM.
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