BOOST VALVE KIT B1 APPLY PISTON (U660E/F
# 103764K

B1 Apply Piston Boost Valve Kit

BOOST VALVE KIT B1 APPLY PISTON (U660E/F

Symptoms:

  • 2nd & 6th Gear shift concerns
  • B1 Clutches burned

Cause:
Wear at the B1 apply boost valve and sleeve can allow the B1 apply control valve to stroke prematurely, resulting in 2nd and 6th gear shift complaints and a burned B1 brake.

Correction:
This Sonnax B1 apply 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 2nd and 6th gear shift complaints and a burned B1 brake. These problems may be caused by continuous oscillation of the steel B1 apply boost valve within the cast aluminum boost sleeve, creating excessive wear and a path for line pressure to exhaust and the B1 apply control valve to stroke prematurely.

Sonnax B1 apply boost valve kit has upgraded materials and minimal clearances to prevent wear and restore proper hydraulic control.
  • Boost sleeve is manufactured from highly wear-resistant billet aluminum to prevent excessive wear
  • Restores proper line rise

Kit Contains:

  • Valve
  • Sleeve

SONNAX Installation Instructions

Type of Product: Sundry Parts
Qty Needed:
Years:
Alternative #:
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