Sonnax super hold servo kit K65703 for GM TH200, 200-4R, TH200C 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 servo
Extra-long servo pin and optional parts for highly tunable shift feel
Outstanding sealing characteristics
Made from 6061 billet aluminum for improved strength
Replacement seal kit and servo pin kit available

More From This Category

Sonnax Heavy Duty Output Shaft, 4L60-E, 4L65-E, 4L70-E, Each

Sonnax Heavy Duty Output Shaft, 4L60-E, 4L65-E, 4L70-E, Each

$1,125.69

Sonnax Shift Detent Lever Retaining Clip, GM, Powerglide

Sonnax Shift Detent Lever Retaining Clip, GM, Powerglide

$11.36

TCI TH350 Direct/Forward Drum Nitrided Clutch Plate (11).

TCI TH350 Direct/Forward Drum Nitrided Clutch Plate (11).

$87.69

Motive Gear Differential Carrier Bearing Kit, Koyo, For CHEVROLET AVONDALE 1995–1997, Kit

Motive Gear Differential Carrier Bearing Kit, Koyo, For CHEVROLET AVONDALE 1995–1997, Kit

$111.10

Motive Gear Differential Pinion Bearing Kit, Koyo, Suit 9 Inch Ford, Large Daytona Pinion Bearing

Motive Gear Differential Pinion Bearing Kit, Koyo, Suit 9 Inch Ford, Large Daytona Pinion Bearing

$130.26

Sonnax Zip Kit®, Toyota/Lexus U660E, U660F, Each

Sonnax Zip Kit®, Toyota/Lexus U660E, U660F, Each

$544.81