Contact between the aluminum GM Powerglide ring gear and the Reverse clutch pack pressure plate causes damage to both components and generates metal debris that circulates throughout the transmission. The OE design with direct metal-to-metal contact is tolerable at original speeds, but is a far greater concern in racing transmissions at higher operational speeds.
Sonnax ring gear anti-wear washer kit 28510-AW fits over the ring gear, preventing metal-to-metal contact between the ring gear and everse clutch pack pressure plate. The washer will work with most ring gears that accept stock-type reverse clutch plates.

More From This Category

Sonnax Replacement Seal Kit, Ford, AOD, Each

Sonnax Replacement Seal Kit, Ford, AOD, Each

$13.48

MANLEY Connecting Rod Pin Bushing, Bronze, .930 in. OD, .866 in. ID, .840 in. Length, Set of 4

MANLEY Connecting Rod Pin Bushing, Bronze, .930 in. OD, .866 in. ID, .840 in. Length, Set of 4

$91.14

Motive Gear Differential Pinion Bearing Kit, Koyo, For CADILLAC ESCALADE 2007–2013, Kit

Motive Gear Differential Pinion Bearing Kit, Koyo, For CADILLAC ESCALADE 2007–2013, Kit

$138.95

Sonnax Overdrive Clutch Hub Bushing, Chrysler, 41Te, 42Le, ('96 & Up), 62Te

Sonnax Overdrive Clutch Hub Bushing, Chrysler, 41Te, 42Le, ('96 & Up), 62Te

$43.34

TCI Transmission Upgrade Kit, Trans-Scat, For Chevrolet, For Buick, For Oldsmobile, For Pontiac, For GMC, TH350, Each

TCI Transmission Upgrade Kit, Trans-Scat, For Chevrolet, For Buick, For Oldsmobile, For Pontiac, For GMC, TH350, Each

$216.97

TCI TH400 Xtreme Performance HD Frictions for Direct Drums

TCI TH400 Xtreme Performance HD Frictions for Direct Drums

$225.88