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  • Pump damaged
  • Pump slide wear
  • Gear ratio codes
  • Low pressure
  • No 4-5


Wear at the main pressure regulator bore causes instability in decrease oil and balance oil.


This kit enables the repair of the pressure regulator bore, returning stability to decrease oil and balance oil.

5L40-E, 5L50-E

Pressure Regulator Valve Kit
Part No. 55211-08K

You need this if... View Instructions
  • Valve and sleeve kit restores hydraulic integrity to the pressure regulator valve circuit.
  • Allows salvage of expensive pumps.
  • Valve
  • Sleeve
  • Spring Pin

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.

GM 5L40-E, 5L50-E Valve Body Layout

Gm 5l40 e vbl thumb

November 24, 2015

GM 5L40-E, 5L50-E Vacuum Test Guide

Topics: Vacuum Test Guides Vacuum Testing Transmission GM 5L50-E Transmission 5L40-E Transmission

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  • 55211 08k combo
  • 55211 08k

You need this if...

A vacuum test at the Balance port holds less than 18" of vacuum. You must temporarily plug the Internal Feed hole to conduct this test. Be sure to un-block Internal Feed when done.

  • 55211 08k details