Detent Kickdown Solenoid for GM TH400 3L80 1965-1982 8629935

Detent Kickdown Solenoid for GM TH400 and 3L80 1965-1982

Replace a diagnosed faulty detent solenoid with this replacement referenced by part number 8629935. Also known as a kickdown or passing-gear solenoid, this valve body component supports the transmission’s electrically activated downshift request during acceleration.

Product Details:

• Part type: Transmission valve body detent / kickdown solenoid

• Compatible transmission applications: GM TH400 and 3L80

• Application years: 1965-1982

• Reference part number: 8629935

• Function: Supports electrically activated passing-gear operation

Repair Considerations:
A failed detent solenoid may contribute to a lack of kickdown response. Confirm the fault before replacement, since switch, wiring, or electrical supply problems can affect the same function.

Fitment Verification:
Match the original component’s reference number, electrical connection, and mounting configuration before ordering. Verify the transmission installed in the vehicle rather than relying on vehicle year alone.

Installation and Fluid:
Follow the applicable transmission service procedures and verify any required seals, gaskets, and fluid before installation. When servicing the transmission, consider Lubegard ATF appropriate for the application and confirm the required fluid specification.