Rc18mt
 

Guys when you get out of the throttle and go to the brake. there is a grinding (sounds like a gear being stripped) When I put the mamba on it got exponentially worse. I am sure it is due to the extra braking the motor is doing on the spur and the rest of the drive train. It is not damaging the spur, I have checked. And no damage to the pinion ( a robinson 15t). So it is the 60t spur (comes standard on the MT) and a 15t pinion on a 5400 kv mamba.
Anyway I think this grinding is from in the differentials. Is this correct?? Is this doing damage?? or is this the diff balls inside the diff ball tube and its normal??
I haven't torn into a diff yet. but my understanding is that the diff balls replace the spiders and just kind of lock up inside to provide a gearing effect.

What does it do when you drive backwards?

rc18t diff needs to be shimmed
the the diff gears are slipping

It goes backwards fine..just when braking or changing from forward to reverse, it makes that noise most of the time. The harder I brake the more noise usually.

I'll check that out shadow350z, thanks

yeah i got information from one18th.com
They are saying use "DIFF SHIMS"


"spoolin ex"-shims should fix it, i have 7 shims in the rear and 5 in the front on my mt

here tip
by "Ice"
take the dogbones out of the outdrives. then take a 1.5 size alen key in one of the 2 outdrives(one of the outdrives dose not have a slot for the allen key, one dose) right to tight left to loosen



heres another tip
taken from one18th.com by "moose"
The stock dogbones tend to flex and pop out. Buy a pack of losi mini-t dogbones (stock) and use those to replace the RC18T ones. They are just a hair longer and will not flex like the stock plastic ones.
PIC will not attch for some reason but pin-to-pin measurements are:
RC18T-45mm
MiniT- 46mm

You were right the rear diff is worn. I will have to see if my LHS has some shims that fit. and a couple of new diff gears. I will get a spare. I think that mamba will eat them if you get out just a little bit.

Another thing to watch out for is the diff outputs are made of plasticand can flex. On other forums people have used a flange washer over the outputs, they look something like this (] [). It should take care of some flex, even with a brushless.

the newer rc18mt comes with these brass like sleeves compressed over the exposeed diff output cup. I have still rounded off a couple of dogbones.Just ordered the MIP CVD's for a rock solid fix to that issue.
Thanks

Didn't know they addressed that problem, thanks