vbgambini

Ive been hearing a loud thump in the rear part of my 240sx when i shift, but when i shift at like 4000 rpm it dosent, but any lower than that it makes a thump like either the spare is hitting or something else, mostly in first to second gear. Please help!!

Chiefgmsr

Check your tires

vbgambini

what with the tires?

Chiefgmsr

They may Not be balanced properly. You might have bad rims.

vbgambini

how would i check that? and what is making the thumping noise when i shift? its only in low rpms

Chiefgmsr

I would suggest takin the tire off the rim and puttin it on a balancing machine.

vbgambini

so whats making the thumping noise then? something hitting something else?

Chiefgmsr

All I know is that it's happened to me. The tire needed to be rebalanced. Car was smooth after rebalancing.

Chiefgmsr

This is why I'm sayin this. I should've ask u is it a constant thump? like a constant pounding at a certain speed?

vbgambini

you think i will get charged extras when i get my alignment done, cuz i just put on my tein flex?

vbgambini

no its only when i shift, the jerking, not a constant thump, also when i release the gas a thump may happen. mostly with low rpms.

Chiefgmsr

Oh then I'm not really sure.

vbgambini

can anyone help me????

LTSCUDRFT

might just be a worn rear-end, it kinda sounds like a click and a thump. or the trans mount might be gone or motor mounts, most likely the trans though.

Levi SPL S14

Cheifgmsr your whole bad tire/wheel would be correct if the noise was a constant.

vbgambini im sure its just your sub frame bushings go get the spacers and the problem will go away.

Try tanabe,kazama and others that make them.