1993 to 2015 General Motors vehicles equipped with the 4L60E, 4L65E, and 4L70E automatic transmissions with high mileage can have severely worn line pressure regulator (PR) bore requiring an oversized valve. As a result, in those cases where the wear is most prevalent at the balance end of the valve, the pressure will be unstable. Moreover, if the wear is severe enough, it can result in unregulated high line pressure. On the other hand, in those cases where the wear is most prevalent at the spring end of the valve, the leak in that area would cause low line pressure. For the same reason, the symptoms will vary as well, ranging from harsh shifts, soft shifts, burnt frictions, overheating, to converter clutch failure.
This precision USA-made steel oversized valve is design to provide full-time line-to-lube, as well as restoring the hydraulic integrity of the circuit. It also features longer spool land distributing load over a greater surface area for increased durability. Lastly, the kit includes a tailored spring and seat providing the recalibration required for the larger diameter valve.
- Low line pressure
- Erratic or high line pressure
- Burnt 3-4 clutch
- Planet burn-up
- Overheating or burnt fluid
- TCC slip
- Precision USA-made steel oversized valve
- Spring seat
- TransGo 4L60E Pressure Regulator Valve Tool Kit (Oversize)