PART # 38783K
- OD roller clutch failure
- No Forward
- Overrun clutch distress
Lack of sufficient holding power in the overdrive roller clutch.
Apply the overrun clutch in all gears except OD 4th, reinforcing the roller clutch to adequately support heavy loads.
Insufficient holding power in the overdrive roller clutch is the underlying cause of chronic overdrive roller clutch failure in hardworking 4L80-E and 4L85-E transmissions. When the roller clutch fails, the damage can be catastrophic and the only fix is replacing the drum, planetary assembly and mating components.