Printpartsummary
Symptoms:
  • Burnt converter
  • TCC apply & release concerns
  • TCC codes
Cause:

Continuous oscillation of the steel lockup control plunger valve wears the inside of the cast-aluminum sleeve bore, allowing converter apply pressure to exhaust and preventing proper control of the lockup control valve

Correction:

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

55-50SN, 55-51SN

Lockup Control Valve Kit

Part No.

59947-03K

Lockup Control Valve Kit
  • 59947-03k_combo

  • Lockup Control Valve Kit

Small_59947-03k_combo Small_59947-03k

55-50SN, 55-51SN

Lockup Control Valve Kit

Part No. 59947-03K

  • Valve
  • Sleeve

Also fits AW55-51SN, AF 23/33 and RE5F22A units.

Complaint:

  • Burnt converter
  • TCC apply & release concerns
  • TCC codes

Cause:

Continuous oscillation of the steel lockup control plunger valve wears the inside of the cast-aluminum sleeve bore, allowing converter apply pressure to exhaust and preventing proper control of the lockup control valve


Correction:

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

  • Sleeve is manufactured from highly wear-resistant billet aluminum.
  • Valve is made from hard-coat anodized aluminum to prevent wear.
  • Salvages costly cores with minimal labor.
  • Eliminates the need for expensive OE valve bodies.

You need this if...

A vacuum test of the sleeve assembly (while in the bore at the outboard converter apply feed port and TCC signal oil port as indicated) gives less than 18 of vacuum, or if a Wet Air Test at the same locations results in leakage at the neighboring exhaust ports on the opposite side of the casting.

  • Test Locations

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Valve Body Layouts

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.

Valve Body Layout Aisin AW 55-50SN
Contact a Sonnax Distributor to purchase this part.