Symptoms:

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

Cause:

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

Correction:

Sonnax drop-in throttle valve plug kit has been designed to eliminate excess leakage and includes a tightly toleranced, wear-resistant sleeve.

AOD

Throttle Valve Plug Kit
Part No. 76989-03K

Factory style sleeve, no O-rings

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

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 excess leakage
  • 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
  • Drop-in Zip Valve™ parts install quickly and easily
  • Plug
  • Sleeve
  • AOD Throttle Valve Plug Kit 76989-03K
  • AOD Throttle Valve Plug Kit 76989-03K

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.

AOD Throttle Valve Plug Kit Vacuum Test Locations