when i had my stock rusty with the trx .15 the one way bearing was worn and i had to clean it every time i drove it so i bought a new one and it didnt last that long till it was slipping again, so if you buy a new bearing and it still slips its probably the bushing is worn and to much oil from the engine is leaking throgh it and getting in the one way bearing, also i heard that if you store the car at an angle so the oil runs towards the flywheel it wont slip at startup and my O.S. started to slip when starting it and i started storing it at an angle and it hasnt slipped since