GM Powerglides used for drag racing generate higher line pressure than the OE servo piston can withstand. At pressures over 200 psi, the OE piston can crack, resulting in transmission failure. Sonnax servo piston kit 28821-01K improves transmisison performance and durability under high-pressure conditions.

High-strength billet aluminum piston also features a rounded profile for better stress distribution
Dual O-ring-style piston improves sealing in worn or scuffed cases
Easy to install, no case modifications required

More From This Category

Motive Gear Differential Bearing Kit, Koyo, For DODGE RAM 2500 2003–2010, Kit

Motive Gear Differential Bearing Kit, Koyo, For DODGE RAM 2500 2003–2010, Kit

$449.19

Motive Gear Differential Bearing Kit, Koyo, For LEXUS GX470 2003–2009, Kit

Motive Gear Differential Bearing Kit, Koyo, For LEXUS GX470 2003–2009, Kit

$347.22

Motive Gear Differential Bearing Kit, Timken, For Ford EXPEDITION 1997–1999, Kit

Motive Gear Differential Bearing Kit, Timken, For Ford EXPEDITION 1997–1999, Kit

$358.62