Sonnax servo piston 28821-02 for GM Powerglide units features a dual-seal design and can be used with one or two PTFE or OEM-style cast seals.

High-strength billet aluminum piston
Piston features a rounded profile for better stress distribution

More From This Category

Motive Gear Differential Bearing Kit, Koyo, For AM GENERAL HUMMER 1992–2001, Kit

Motive Gear Differential Bearing Kit, Koyo, For AM GENERAL HUMMER 1992–2001, Kit

$256.79

Sonnax Extreme Duty Main Shaft, GM, Th400, 4L80-E, 4L85-E, Each

Sonnax Extreme Duty Main Shaft, GM, Th400, 4L80-E, 4L85-E, Each

$1,572.94

Motive Gear Differential Master Bearing Kit, Koyo, For Ford F-150 2008, Kit

Motive Gear Differential Master Bearing Kit, Koyo, For Ford F-150 2008, Kit

$401.72