Cause:
These complaints can be caused by wear of the reverse boost valve sleeve, allowing line pressure to escape to exhaust.
Correction:
This Sonnax reverse boost valve kit has upgraded materials and tighter clearances to prevent wear and restore proper hydraulic control.
Vehicles with Toyota/Lexus U660E, U660F transmissions may exhibit insufficient line rise in reverse gear, 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 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 excessive wear
Symptoms:
Cause:
These complaints can be caused by wear of the reverse boost valve sleeve, allowing line pressure to escape to exhaust.
Correction:
This Sonnax reverse boost valve kit has upgraded materials and tighter clearances to prevent wear and restore proper hydraulic control.
Vehicles with Toyota/Lexus U660E, U660F transmissions may exhibit insufficient line rise in reverse gear, 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 has upgraded materials and minimal clearances to prevent wear and restore proper hydraulic control.
Kit Contains:
SONNAX Installation Instructions