i was driving one day and everytime i slow down i hear this weird noise coming from my differential when it's in neutral...i changed the diff fluid about 10k and it sounds like you rolling your tongue...it's very weird...what can this be? do i need to change the fluid again?

 

You hear nothing (a high pitched whine) when accelerating?
Why are you certain its the diff?

If possible get underneath the car and check the driveline from propshaft to wheel.
Check if the CV's rubber boots are all without damage.
Are you lowered?
Are the brakes warm or hot after driving, is one disk hotter then others?
No noises when decelerating in gear?

 

umm..it's been doing that before i lowered and the sounds only comes on when i'm decelerating...like i'll put it in neutral and i'll start hearing that noise...haven't checked the brakes yet...it's not high pitch when i'm accelerating i don't hear anything when i'm accelerating...thanks though...i'll chck underneath the car and i'll post it back up.

 

btw i have 62K miles on my ap1. n changed the fluid once with purple royal or royal purple or w/e haha...is there any other diff oil that you guys can recommend me? i don't really like that purple royal brand.

 

Amasol 607
http://www.hardtopguy.com/store/product.ph...t=11&bestseller

 

If you only hear the noise while decelerating in neutral then it probably isn't the diff. Do you know if the rear axle nut has be re-torqued to the new higher spec?

 

thanks.

 

no i don't.....so where will it be a good place to take my car to? dealers?? thanks.