Product Description
U660E U660F Reverse Boost Valve Kit
No tooling required
Vehicles with Toyota/Lexus U660E, U660F transmissions may exhibit insufficient line rise in Reverse, delayed Reverse engagement and/or a burned B2 brake. These problems may be caused by continuous oscillation of the steel boost valve within the cast aluminum boost sleeve, creating excessive wear and a path for line pressure to either leak to exhaust or leak to the EPC boost circuit and create high line pressure conditions.
Sonnax Reverse boost valve kit 47740-17K has upgraded materials and minimal clearances to prevent wear and restore proper hydraulic control.
- Sleeve is manufactured from highly wear-resistant billet aluminum to prevent excess wear
- Restores proper line rise
- Hardcoat anodized aluminum valve combats premature wear
- Drop-in Zip Valve™ parts install quickly and easily
Symptoms
- Delayed Reverse
- Low line rise in Reverse
- B2 Clutches burned
Cause
Wear of the reverse boost valve sleeve allows line pressure to escape to exhaust.
Correction
Sonnax drop-in reverse boost valve kit features upgraded materials and tighter clearances to prevent wear and restore proper hydraulic control.
Contents
- Valve
- Sleeve
