Toyota/Lexus vehicles equipped with A750E and A750F transmissions may exhibit 5th Gear complaints and a burnt B1 brake as well as low line pressure, resulting in poor shift quality and slipping in Forward or Reverse. These issues can often be traced to wear in the B1 apply control plunger sleeve, which allows line pressure to escape and cause drivability concerns.
Installing Sonnax B1 apply control plunger kit 147741-55K eliminates pressure loss, revives B1 apply pressure control and restores shift quality.

Sleeve manufactured from highly wear-resistant aluminum
Hardcoat anodized aluminum valve combats premature wear
Annular groove helps center valve in sleeve to reduce side-load wear
Drop-in Zip Valve™ parts install quickly and easily

Learn More About Zip Valve™ Drop-In Repairs

More From This Category

TCI Speedometer Gear, Driven, 44-Tooth, Gray, GM Turbo-Hydromatics, Each

TCI Speedometer Gear, Driven, 44-Tooth, Gray, GM Turbo-Hydromatics, Each

$49.76

TCI Solenoid, Trans-Brake, Steel, Natural, For Ford, C-4, Each

TCI Solenoid, Trans-Brake, Steel, Natural, For Ford, C-4, Each

$319.87

Wilwood Bearing Cone, Stock Hub, Inner

Wilwood Bearing Cone, Stock Hub, Inner

$37.27

Sonnax Ain. Hub Front Bushing, BMW, ZF8Hp45/50/55/70/75, 845Re

Sonnax Ain. Hub Front Bushing, BMW, ZF8Hp45/50/55/70/75, 845Re

$44.10

TCI Speedometer Gear, Drive, 15-Tooth, Olive Green, GM 700R4, Each

TCI Speedometer Gear, Drive, 15-Tooth, Olive Green, GM 700R4, Each

$49.76