it seems that i lost the upper stopper washer when i changed my diff bushings to whiteline, it comes between the diff bushings and the sub-frame.. i kept a metal washer instead..

will the metal washers be just like those stoppers or should i buy them from dealer?

i changed the diff bushings because of the wheel hop i get in the drag track.

 

I'd just get one from the dealer. They're not that expensive. Can't hurt to be safe.

 

^^^ Called our local dealer, they dont have them in stock.. so i made an online order from courtsy nissan.. it will need around 2 weeks to be delivered to me.

there is not even one real pic of those upper hats online!!! i dnt even know if they made from steel or rubber.

because i changed the diff bushings to whiteline and there is still wheel hop.. so i thought its either because this piece is missing or i didnt torque the bolts enough..

soo am fixing both things and hopefully the wheel hop will be eliminated.

 

the whiteline diff mount bushings, the ones that need the metal washers, have a certain way that they go in... if you noticed one is half if bigger than the other half... make sure you have them in the right way

 

There's more to wheel hop than just diff bushings. Solid bushings would have been best to get rid of most of the wheel hop though.

 

yeah, the smaller half on top and the bigger half down.

i solve the problem, i found a wrecked z and took its upper diff mounts washer and this is what i did:

top hat metal washer
small part of whiteline bushing
big part of whiteline bushing
rubber washer
down hat metal washer

 

your right, but now wheel hop is much less!! its not eliminated but i can feel i reduce it allot !!