Symptoms:

  • No lockup
  • Shift concerns
  • Engine stall on engagement
  • 2-3 Flare
  • No 2-3
  • Harsh shifts
  • B5 Clutch distress

Cause:

Sleeve wear affects the position of the solenoid relay valve. Complaint depends on amount of solenoid modulator oil loss and in which position that valve may seize.

Correction:

The tightly toleranced, drop-in replacement Sonnax solenoid relay valve kit restores proper hydraulic clearances and uses upgraded materials to prevent wear.

55-50SN, 55-51SN

Solenoid Relay Valve Kit
Part No. 59947-05K

Also fits AF23/33 and RE5F22A units.

You need this if... View Instructions Find a Distributor

In Aisin AW 55-50SN and 55-51SN units, the original equipment solenoid relay plunger valve sleeve is prone to wear due to the continuous oscillation of the plunger valve. Solenoid modulator pressure feeds into this sleeve, which then works to correctly position the inboard solenoid relay valve. This valve is responsible for directing lockup control fluid into the TCC signal circuit to apply the converter clutch, as well as directing B5 control fluid to the U1 shift valve to apply the 1-2 Reverse (B5) clutch. A worn sleeve will then prevent proper lockup control and B5 clutch operation, resulting in the noted symptoms. Sonnax solenoid relay valve kit 59947-05K eliminates wear and restores proper circuit control.

  • Sleeve is manufactured from highly wear-resistant billet aluminum
  • Hardcoat anodized aluminum valve combats premature wear
  • Salvages costly cores with minimal labor
  • Eliminates the need for expensive OE valve bodies
  • Valve
  • Sleeve

Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.

Aisin AW 55-50SN, 55-51SN Valve Body Layout

Aisin AW 55-50SN, 55-51SN Valve Body Layout
  • 55-50SN, 55-51SN Solenoid Relay Valve Kit 59947-05K
  • 55-50SN, 55-51SN Solenoid Relay Valve Kit 59947-05K

You need this if...

Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected.

55-50SN, 55-51SN Solenoid Relay Valve Kit Vacuum Test Locations