November 24, 2015
Symptoms:
- Low pressure
- Pump damaged
- Pump slide wear
- Gear ratio codes
- No 4-5
Cause:
Wear at the main pressure regulator bore causes instability in decrease oil and balance oil.Correction:
Sonnax pressure regulator valve enables the repair of the pressure regulator bore, returning stability to decrease oil and balance oil.5L40-E, 5L50-E
Pressure Regulator Valve Kit
Part No. 55211-08K
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Tooling:
- 55211-TL8
You need this if... View Instructions Find a Distributor
In GM 5L40-E and 5L50-E transmissions, constant oscillation of the pressure regulator valve can cause excess bore wear, resulting in oil pressure loss and cross leaks. Severe wear leads to low pressure, which can cause gear ratio codes and a no 4-5 shift condition. Sonnax pressure regulator valve kit 55211-08K allows the pump bore to be refurbished to remove wear and hydraulic integrity to be restored. The highly wear resistant sleeve provides more contact surface with the valve for increased stability and durability, preventing future wear.
- Valve and sleeve kit restores hydraulic integrity to the pressure regulator valve circuit
- Allows salvage of expensive pumps
- Valve
- Sleeve
- Spring Pin
Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.
GM 5L40-E, 5L50-E Valve Body Layout
