so my diff has been whining like crazy and i have been getting a super nasty vibration from the rear at light throttle if i step on it the vibration goes away if i let go of the gas completely the vibration goes away.
but if I'm at PT the vibration is crazy.


also i have alot of play in gear.


like for example if i slowly accelerate and let go of the gas i get a huge jump what can that be is all that coming from the diff?
or is that normal.
the mounts are the innovative mounts the 75a i believe .

i replaced the axles already i have axle spacers. i am replacing my diff tomorrow


any idea what it can be?

maybe driveshaft???


i would appreciate the help and i hope you guys understand what i am trying to explain.

 

Do you have an aftermarket exhaust?

 

i have a js racing single exhaust .


i don't think its rattling or hitting anything cuz at one point it was hitting and it made a different noise.
and i fixed that problem .

but any suggestions.

 

aftermarket engine mount produce alot of extra vibration and noise i say just replace the diff and see what happen after wards, also check the drive shaft for play.

 

Stiff rear differential mounts won't make vibrations that bad happen. I run the 75As myself.
If it were axle bucket pitting it would get worse with more throttle.

If the car is NA I haven't seen any axles fail.

Given that your diff is whining I am encouraged to thing that replacing the diff would fix the vibrations.

Is the vibration like a buzzing sound that occurs when the top is up or is it a vibration that you feel throughout the car?

 

i replaced the diff already the vibrations are gone but still getting some vibrations on 4th gear 5th at hard throttle i also replaced the axles and i also have axle spacers.



there is a small whine aswell at light throttle .

 

I get a small whine at 10% throttle myself. Happens in both my AP1s.

Axle spacers only defers the problem to a certain point. If you are quite low it is possible you would need to additionally swap the axle buckets.

One one of my cars axle spacers only partially alleviated the problem, then an axle bucket swap was required.

 

What type of axles do you have now? If they are not oem, then your vibration will never go away.

 

Probably mounts . My car is a lot louder and more vibrations since rigid collars went on .. If it was ur diff you would see metalic in the fluid .. Did it start after the mounts went in ?

 

they are oem axles billman