Transmission Parts GM 4L80-E 4L85-E Valve Body Valve / Sleeve

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Symptoms:

Broken AFL filters
2nd Gear starts
Leaking AFL end plug
Code 68, 85, 86, 87
No upshifts

Cause:

Damaged AFL filter or leaking end plug causes driveability problems and/or trouble codes.

Correction:

Renew AFL operation and restore shift control by installing Sonnax drop-in AFL filter end plug and O-ring kit.

4L80-E, 4L85-E

AFL Filter End Plug & O-Ring Kit
Part No. 34994-17K

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GM 4L80-E and 4L85-E transmissions may have 2nd gear starts and no upshifts, which can be accompanied by trouble codes 68, 85, 86 and/or 87. These problems can often be traced to a leaking actuator feed limit (AFL) filter or end plug. Installing Sonnax AFL filter end plug and O-ring kit 34994-17K eliminates these problems by restoring hydraulic control to the circuit.

For a more comprehensive AFL circuit repair, recommend also installing Sonnax actuator feed limit valve kit 34200-16K.

End plug manufactured from highly wear-resistant aluminum
O-Rings positively seal bore to prevent leakage
Drop-in Zip Valve^™ parts install quickly and easily

Learn More About Zip Valve™ Drop-In Repairs

Contents

End Plug
End Plug O-Ring
AFL Filter O-Ring

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.