Product Description
U660E U660F U760E U760F Oversized Primary Pressure Regulator & Reverse Boost Valve Kit | Sonnax
KIT CAN BE USED TO REPLACE EITHER OE RATIO
Sonnax Part Number: 47740-02K
TOOLING REQUIRED
- 47740-02K
Toyota/Lexus vehicles equipped with U660E, U660F, U760E, U760F units commonly exhibit a number of symptoms related to line pressure instability. A few of these concerns are poor line rise and clutch/brake slippage, higher than normal pressures in Reverse, erratic shifts and low converter feed pressure. These issues can frequently be traced to excess wear in the primary pressure regulator valve bore. To address these problems and restore full hydraulic control, Sonnax offers oversized primary pressure regulator and Reverse boost valve kit 47740-02K.
- Hardcoat anodized aluminum valves combat premature wear
- Annular grooves on the valve help center it in the bore to reduce future side-load wear
- Wear-resistant aluminum boost sleeve
- Dual-ratio reverse boost valve assembly can be used with either OE ratio
PACKAGE CONTAINS
- Pressure Regulator Valve
- Boost Valve
- Boost Sleeve
- Spring
- Cup Plugs (2) 1 Extra
SYMPTOMS
- Erratic shifts
- Soft shifts
- Low line pressure
- Low line rise
- Clutch slippage
- High line pressure in Reverse
- Burnt clutches
- High line pressure
- Harsh shifts
- Low converter pressure
CAUSE
Continuous oscillation of the pressure regulator valve causes bore wear which results in line pressure deviation and valve instability. Reverse boost sleeve wear allows Reverse pressure and SLT oil leakage.
CORRECTION
Recover hydraulic control and renew performance by reconditioning the bore and installing the Sonnax oversized primary pressure regulator and Reverse boost valve kit.
