Accumulator piston scuffing and bore wear are common issues in listed Chrysler valve bodies, especially when running increased pressures. The OE accumulator pistons have two seal rings. The seal groove at the open end of the piston is a larger diameter, with the seal ring acting as a guide to prevent piston-to-bore contact. The seal groove at the closed end of the piston is a smaller diameter and the seal ring acts as a conventional seal. However, due to the smaller seal groove diameter, the piston will contact the bore when side-loaded resulting in scuffing, wear and leakage of clutch apply pressure.
Sonnax accumulator piston kit 44894-01K features two guide seal rings, one at each end of the piston to prevent piston-to-bore scuffing when side loaded. Additionally, the oil sealing ring location is relocated on the piston allowing it to run in an un-worn portion of the bore enabling bores with moderate scuffing to be salvaged. Manufactured from 6061 billet aluminum, these pistons will upgrade late model applications with plastic pistons to prevent transmission failure due to piston breakage.

Dual-guide seals prevent piston-to-bore scuffing
Updated seal location allows use in scuffed bores
Prevents transmission failure from broken plastic pistons
Drop-in Zip Valve™ parts install quickly and easily

Learn More About Zip Valve™ Drop-In Repairs

More From This Category

TCI Input Shaft, Hardened, Vaccu Melt 300, 1.82 Carrier, Turbo Spline, 12.625 in. Length, GM, Powerglide, Each

TCI Input Shaft, Hardened, Vaccu Melt 300, 1.82 Carrier, Turbo Spline, 12.625 in. Length, GM, Powerglide, Each

$444.29

Motive Gear Differential Carrier Bearing Kit, Koyo, For Ford EXCURSION 2000–2005, Kit

Motive Gear Differential Carrier Bearing Kit, Koyo, For Ford EXCURSION 2000–2005, Kit

$149.77

PHC Clutch Bearing, Release, For Ford Econovan 1.3 Ltr 1/79-12/84 1979-1984, Each

PHC Clutch Bearing, Release, For Ford Econovan 1.3 Ltr 1/79-12/84 1979-1984, Each

$68.53

TCI 4R70W Bushing Kit.

TCI 4R70W Bushing Kit.

$161.54

Motive Gear Differential Bearing Kit, Koyo, For CHEVROLET CAMARO 2010–2015, Kit

Motive Gear Differential Bearing Kit, Koyo, For CHEVROLET CAMARO 2010–2015, Kit

$224.25