Sonnax TH200/C, TH200-4R Super Hold Servo Kit K65703 Heavy Duty


Out of stock

SKU (TPD Part#): K65703 SNX Categories: ,

Sonnax TH200/C, TH200-4R Super Hold Servo Kit

Sonnax super hold servo kit K665703-1 for GM 200, 200-4R, 200C units features a 17% greater apply area than the Grand National servo. Its pin is longer than the longest OE pin, allowing for a full range of adjustment. The optional parts include a shim, spring and spacer which, when combined with OE springs, result in a variety of shift tuning capabilities. Altogether, the level of customization in this kit makes it ideal for high-performance street applications as well as all-out racing.

Overall sealing characteristics have been improved throughout the servo, which features an O-ring to seal the piston to pin. This O-ring prevents cross leakage between the apply and release side of the piston, ensuring all apply pressure gets to the piston for solid shifts.

    17% Greater apply area than Grand National servoExtra-long servo pin and optional parts for highly tunable shift feelOutstanding sealing characteristicsMade from 6061 billet aluminum for improved strength


    • PistonPinSpacerShimSpringE-clipCover


    • O-Ring Seal

Small (not shown)

    • O-Ring Seal


    Lip Seals (2)Seal Ring (2)





Manufacturer Part Number

Part Type

Transmission Type

Country/Region of Manufacture


Fitment Type


There are no reviews yet.

Only logged in customers who have purchased this product may leave a review.