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Symptoms:
  • Bind-up
  • Bump shifts
  • Burnt clutches
  • CPC codes
  • Downshift clunk
  • Flare shifts
  • Harsh shifts
  • Overheated fluid
Cause:

Bore wear at compensator feed regulator valve allows critical pressure loss that prevents proper clutch timing and control.

Correction:

Recover hydraulic control and renew shift performance by installing Sonnax compensator feed regulator valve kit.

6L45, 6L50, 6L80, 6L90, 6T40 (Gen. 1), 6T45 (Gen.1), 6T50 (Gen. 1)

Compensator Feed Regulator Valve Kit

Part No.

104740-09K

Compensator Feed Regulator Valve Kit
  • 104740-09k__1_

  • Compensator Feed Regulator Valve Kit

  • 104740-09k_6l80-combo

Small_104740-09k__1_ Small_104740-09k Small_104740-09k_6l80-combo

6L45, 6L50, 6L80, 6L90, 6T40 (Gen. 1), 6T45 (Gen.1), 6T50 (Gen. 1)

Compensator Feed Regulator Valve Kit

Part No. 104740-09K

  • Valve
  • Sleeve
  • Spring
  • Retaining Clip

Complaint:

  • Bind-up
  • Bump shifts
  • Burnt clutches
  • CPC codes
  • Downshift clunk
  • Flare shifts
  • Harsh shifts
  • Overheated fluid

Cause:

Bore wear at compensator feed regulator valve allows critical pressure loss that prevents proper clutch timing and control.


Correction:

Recover hydraulic control and renew shift performance by installing Sonnax compensator feed regulator valve kit.

Listed GM transmissions incorporate a low-pressure compensator feed circuit to assist clutch return springs during release of rotating clutches. After clutches disengage, the compensator feed circuit maintains pressure in the clutch release cavity to oppose centrifugal application of the clutches. Control over this process resides with the compensator feed regulator valve. When the bore wears, correct valve operation is hindered, causing clutch apply timing issues such as harsh shifting, flares, and bump shifts. In addition, overheated fluid and burned clutches can result. Installing Sonnax compensator feed regulator valve kit 104740-09K restores normal compensator action for revived shift characteristics in all ranges.

  • Hardcoat anodized aluminum valve combats premature wear
  • Highly wear-resistant aluminum sleeve provides additional valve support
  • Includes calibrated spring for restoring OE compensator pressure

Related Parts

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.

  • Test Locations
  • 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 GM 6T40 (Gen. 1), 6T45 (Gen.1), 6T50 (Gen.1)

Related Tech Articles

Brian Wing

GM Compensator Feed System

Sonnax

GM 6L45-6L90 Vacuum Test Guide

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