77 280z having wheel hop at take off

[rpmszcar]

It didn't be so bad at first but now i have to lite them up at take off. thought maybe bad springs with the clutch? just put new u-joints for the halfshafts. the clutch has maybe 8000 since replaced. im hoping someone can point me in the right way?

[5thhorsemann]

What are you running for tires?

[rpmszcar]

Michelin 195 70 14

[FastWoman]

Are your wheels hopping, or is your clutch chattering? A chattering clutch is sometimes caused by contamination (oil) or by too much clutch material burnt off onto the flywheel and unevenly distributed, often caused by excessive and hard clutch usage (and a hot clutch).

Wheels hopping at takeoff can be caused by REALLY BAD struts. Wheels hopping at speed can be caused by very badly balanced tires/wheels and bad struts.

[rpmszcar]

its got new struts

[FastWoman]

How do you know your wheels are hopping? Has someone observed them hopping from outside the car while you take off? Or do you simply feel a bump-bump-bump-bump as you let out the clutch?

Edited May 11, 2011 by FastWoman

[rpmszcar]

just feels like it , haven't seen it

[FastWoman]

Then your clutch is chattering -- 95% certain, from what you've described. If so, it's probably because you've overheated it repeatedly with too much clutch action, but it could also be because of oil leakage onto the clutch lining. If it's the latter, you need to fix the oil leak. If it's the former, you can find procedures for redistributing the glaze on your flywheel to smooth out the clutch. I've never tried any of them and don't know if they work.

Racing clutches can stand up to harder use, if that's the problem.

Without your sharing more information, all I can really do is to guess what's going on. Good luck figuring out the issue.

[rpmszcar]

Well I have a guy I work with is giving me a 5 speed in a day or two.Man its killing me not driving it. My trucks a slug.