So I’ve got a traxxas slash 2wd (traxxas raptor). I personally don’t like the factory differential. So, I installed a spool. It’s been running fine, that is until I put a VXL3S system on it (running a 3S battery). First, it sheared the roll pin for the transmission input gear. Fixed that with a nail. Transmission was still slipping really bad. Went back in to the transmission, pulled the differential, and found that the 2 set screws on the spool must have backed out some and the shaft was spinning with in the spool hub. Realigned the flat spots, lock tighted the set screws, and tightened them down on the shaft. Worked properly for about 10-15 mins. Now the transmission is slipping again, though not as bad. Sanded the slipper clutch pads, pressure plate, and drive hub so it has more bite. I also tightened down the slipper. Same thing. Anyone ever experienced this?