Transparts Warehouse

34994-01K

4L80E 4L85E Transmission TCC Regulator Valve Kit Sonnax 34994-01K

Valve Body Kits

This TCC regulator apply valve kit with a hard-anodized aluminum valve with PTFE seal prevents valve bore related problems.
Sonnax offers a replacement TCC regulator apply valve kit 34994-01K that will prevent valve-bore related problems.
Hard-anodized aluminum valve incorporates a PTFE seal at the main wear area of the bore to prevent oil loss.
The valve spool land at the spring end has been lengthened to provide greater bore-to-valve surface contact, thus further preventing leakage.
The valve spool has annular grooves to help center the valve in the bore.

4L80E/4L85E transmission TCC regulator valve kit. Symptoms: Burnt converter converter shudder TCC apply & release concerns TCC codes. Cause: TCC regulator apply valve wears the aluminum bore, causing loss of converter apply pressure oil. Correction: This TCC regulator apply valve kit with a hard-anodized aluminum valve with PTFE seal prevents valve bore related problems. Some vehicles with a 4L80-E transmission may exhibit the following problems: converter shudder, burned converters, no TCC clutch apply, and/or code 68/39 or P1870/P0741. Often these complaints can be caused by the constant oscillation of the steel TCC regulator apply valve wearing the aluminum bore, resulting in a loss of converter apply oil pressure. Sonnax offers a replacement TCC regulator apply valve kit 34994-01K that will prevent valve-bore related problems. Hard-anodized aluminum valve incorporates a PTFE seal at the main wear area of the bore to prevent oil loss. The valve spool land at the spring end has been lengthened to provide greater bore-to-valve surface contact, thus further preventing leakage. The heavier spring provides OE lockup feel. The lighter-duty spring provides a firmer lock-up, best suited for towing applications. The valve spool has annular grooves to help center the valve in the bore. A .030" chamfer has been added to allow more line pressure into the TCC regulator apply circuit to prevent converter shudder.

ACDelco 24210864 GM Original Equipment Automatic Transmission Torque Converter Clutch Pulse Width Modulation Valve
Sonnax 34994-02K
ATSG 4L80E THM Transmission Repair Manual
Lubegard 19250 Dr. Tranny Assemblee Goo, Green, Firm Tack Lubricant, 16 oz.
Sonnax 4L80E 4L85E Transmission Actuator Feed Limit Valve Kit 34200-16K
FAE Stop Light Switch
Aisin CMT 138 Clutch Master Cylinder CMT-138
Mix me 2110