Summit popping noise
 

So i just picked up used summit. It has been sitting for awhile and i took a chance on buying it. Anyway i ran it and i hear this popping/crackling noise that is very random. It sounds like plastic being spread apart and slapping back together.

Ive been in the hobby for a long time and it does not sound like diffs clicking or the ring and pinion clicking. It doesnt mean its not but i dont think so.

Anyone have any idea what it could be? Maybe its a common thing that iam unaware of.

Thanks

Re: Summit popping noise
 

the rear diffs bearings are shot. replace them before they destroy the diff case, ring and pinion.

Re: Summit popping noise
 

And be sure to check and shim the diff gears as needed too.

Re: Summit popping noise
 

when does it happen? only on throttle? only hard throttle? light throttle? off throttle too? turning?