SECONDARY REGULATOR VALVE & SRING KIT
# 74796K

Secondary Regulator Valve & Spring Kit (Requires Tool available by Special Order)

SECONDARY REGULATOR VALVE & SRING KIT

Symptoms:

  • CC slip
  • TCC surge
  • Overheated fluid, bushings & converter
  • Poor shift quality
  • Harsh Reverse
  • Low lube oil flow
  • Bushing failure

Cause:
Bore wear at the spring end of the valve allows the SLT circuit and regulated converter pressure to cross leak. Bore wear at the balance end of the valve reduces converter and lube flow.

Correction:
Install the Sonnax secondary regulator valve and spring kit to restore hydraulic integrity to the circuit.


Aisin 55-50SN, 55-51SN secondary regulator valve bores are very active, and subject to wearing the casting bore. This valve regulates converter feed pressure according to throttle (SLT) pressure, and also is the primary distributor of lube flow throughout the transmission. Wear at the valve bore diminishes the valves ability to supply proper converter and lube pressure, resulting in converter related complaints and rapid bushing failure.

The Sonnax oversized secondary regulator valve restores proper hydraulic clearance. The front spool of the Sonnax valve has been lengthened significantly, providing more support to prevent future wear.

  • Salvages valuable core
  • Improved valve support to reduce wear
  • Improved converter feed and lube flow
  • Hardcoat anodized aluminum valve combats premature wear

Content:

  • Valve
  • Sleeve

SONNAX Installation Instructions

Type of Product: Sundry Parts
Qty Needed:
Years:
Alternative #:
Availability: 7, 7, 7