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Symptoms:

  • Overheated clutch
  • Overheated band
  • Low line rise
  • Uncontrollable shift timing
  • TV pressure imbalance

Cause:

The throttle valve plug wears the sleeve, allowing throttle valve feed oil to leak past the plug and exhaust.

Correction:

The replacement kit has been designed to eliminate excessive leakage and includes a tightly toleranced, wear resistant sleeve.

AOD

Throttle Valve Plug Kit
Part No. 76989-03K

Factory style sleeve, no o-rings

View Instructions

Uncontrollable throttle pressure due to oil loss is a common complaint in vehicles with an AOD transmission. This results in low line pressure and poor throttle and shift timing adjustments. The hardened steel throttle valve plug continuously reciprocates within the aluminum throttle valve sleeve, wearing the inside diameter of the sleeve. This wear allows throttle valve feed oil to leak past the plug and exhaust, resulting in poor line rise.

  • Throttle valve plug and sleeve kit eliminates excessive leakage.
  • Replacement sleeve has been manufactured from a special aluminum designed to prevent wear.
  • Steel plug has been tightly toleranced to allow minimum clearance with the inside diameter of the sleeve, restoring hydraulic integrity to the assembly
  • Plug
  • Sleeve

September 30, 2005

Anatomy of a Transmission: Oil Flow in the Pump-PR-Converter-Cooler Lube Circuits

Gregg Nader

Topics: Diagnostics And Theory Transmission

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  • 76989 03k combo
  • 76989 03k