Transmission Parts GM 4T60 4T60-E Valve Body Valve / Sleeve

Symptoms:

Code 39, 740, 1870
Falls out of lockup when hot
Overheated converter
Shudder
Low cooler flow

Cause:

Wear of the TCC apply valve bore allows leakage of TCC signal oil to exhaust and the apply valve to move into the TCC release position.

Correction:

Recondition the bore and install Sonnax oversized TCC apply valve kit to restore hydraulic integrity.

Warning:

Required tool kit 84754-TL5 is no longer in productions. Check with your distributor for availability.

4T60, 4T60-E

Oversized TCC Apply Valve Kit
Part No. 84754-16K

'96-Earlier with steel valve

Tooling:

84754-TL5

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

In GM 4T60 and 4T60-E units, the TCC apply valve acts as the switch valve for converter apply and release. The TCC regulator valve controls TCC apply pressure. Both the apply valve and the regulator valve can cause slip codes. When the apply valve is worn, it often returns to the un-apply position even though the TCC apply solenoid remains energized. Generally the apply valve causes larger changes in slip RPM as the converter cycles from apply to full release. The regulator valve causes a more gradual load and heat-sensitive slip. Reconditioning the bore and installing Sonnax oversized TCC apply valve kit 84754-16K restores hydraulic integrity.

PTFE seal prevents loss of signal oil that strokes the valve
Oversized versions available to restore the valve body bore
Standard-size versions are drop-in replacements and do not require valve body removal
Tool kit services both early and late models

Contents

Valve
Seal PTFE
Spring

Specs

Material: Steel

Valve Body Layout

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.