Originally Posted by
IndyRC_Racer
I've run a 84/50 for VTA on a TC3/TC4 which is also a 4.2. If you run that large of a pinion you will have to dremel out the area of the chassis below the pinion.
You are right I didnt notice it at first but a 53 pinion does hit the chassis just below the pinion. A quick dremel grind like you said did fix this.