Product Description
42RE 42RH 44RE 44RH 46RE 46RH 47RE 47RH 48RE A727 A904 Oversized Lockup Boost Valve Kit
1994-UP Units with Boost Oil Delivery Tube Only
Sonnax Part Number: 22771-19K
TOOLING REQUIRED
- F-22771-TL19
- VB-FIX
Chrysler 42-46-47-48RH/RE transmissions are equipped with a lockup boost valve that is prone to wear. When this valve wears, it causes a loss of converter and lubrication flow, which can result in TCC slip and an overheated converter. Lockup boost valve wear also causes excessive line pressure, and line rise during TCC apply or in 4th Gear can be lost. Sonnax oversized lockup valve boost kit, 22771-19K restores the lockup boost circuit pressures. The lockup boost valve kit will correct TCC apply, lubrication and overheat problems, as well as maintain proper line pressure.
- Hardcoat anodized aluminum valve combats premature wear
- Spring is calibrated to match OE pressure with the oversized valves
PACKAGE CONTAINS
- Lockup Boost Valve
- Plug Valve
- Spring
- Spring Retainer
SYMPTOMS
- TCC slip under load
- No line rise during TCC apply in 4th
- Overheated converter
- Loss of lube oil
- High line pressure with no indication of boost
- No lockup
- TCC cycling
CAUSE
Excess boost valve bore wear reduces oil pressure to the switch valve, resulting in a partial stroke position, restricting the converter and lube circuits.
CORRECTION
Sonnax oversized lockup boost valve kit restores the proper pressures to the switch valve and main regulator valve, ensuring proper flow through the converter and lube circuit and correcting line pressure.
