looks like you have got the pinoin to crownwheel clearance ( backlash ) wrong, or the gear are worn like s**t

and the R31 diff gears are s**t

3.7s are only about $250-350 anyway

um..so how is this backlash adjusted??

Cheers

well u need to take the diff out.
ahh f**k some one else expalin it.

....please? just explain the very simple aspects of it... eg adjust this bolt. Or whatever.


Cheers

Okay, got a gregorys manual? ... no? go get one .

on the diff page, it shows your backlash settings, from markings on the crownwheel . ... Look to see how on the crownwheel how the pinon has been turning the crownwheel, You need to make it line up 100% to how it was removed from another diff centre ... if you need to adjust it, to change the backlash, (moving the pinon in/out) use shims inside the pinon.

diff gears HAVE to be matched, You should never get say a 3.xx crownwheel and a pinon from something another car, EVEN if its the same ratio .

crownwheels and pinons wear in together as a set, and should NEVER be mis-matched, otherwise your WILL get bad noises.

get yourself a complete diff, mark the the crownwheel and pinon, with white or something your can rub off afterwards and install them the SAME way they came out ...

Ive got a gregory's manual, Ill check it out. Thanks for the advice.

blew the diff today, had to get it towed home. So Im pulling it apart tomorrow... Ill take some pictures. (its BAD).

Cheers

Yup, lets see pic's