O/SIZE SEC PRESS REG & BOOST VALVE KIT
# 72790K

Oversize Secondary Pressure Regulator Valve Kit* Reamer Required

O/SIZE SEC PRESS REG & BOOST VALVE KIT

Symptoms:

  • Harsh lockup
  • TCC apply & release concerns
  • Burnt converter
  • Lube failures

Cause:
Severe wear of the valve and bore allowing EPC and/or balance pressure loss.

Correction:
The Sonnax oversized secondary pressure regulator valve kit with upgraded materials and minimal clearances prevents wear and restores proper hydraulic function.


The continuous oscillation of the secondary pressure regulator valve in Toyota/Lexus A750, A760, A960 and AB60 series units wears the valve spools and valve body bore at the contacting surfaces. This wear results in TCC pressure irregularities and valve instability. If pressure is high, harsh lockup clutch engagement can result. If the pressure is too low, the TC clutch cannot achieve complete lockup. Continuous clutch slippage will lead to burnt clutch material and converter. Under these conditions, loss of mileage and poor drivability are to be expected.

The Sonnax oversized secondary pressure regulator kit includes a high-quality steel valve with annular grooves to reduce side load wear and extend valve and valve body life.

  • Valve is made from high quality, hardened steel to resist wear
  • Inner spool has annular groove to reduce side-loading

Content:

  • Valve
  • End Plug

SONNAX Installation Instructions

Type of Product: Sundry Parts
Qty Needed:
Years:
Alternative #:
Availability: 8, 8, 13