The piston bore in GM 4T80-E units is prone to wear, either through normal operation or uneven loading from the spring. The Sonnax 2-3 accumulator piston 72871-01 provides more piston-to-pin support and greater durability than OE replacements.

Increased bore length for more piston-to-pin support
Machined from high-quality aluminum
More durable than OE replacements
Piston accepts standard OE or replacement seals
Drop-in Zip Valve™ parts install quickly and easily

Learn More About Zip Valve™ Drop-In Repairs

More From This Category

RTS OE Automatic Transmission Modulator Valve, GM TH350, TH400, Adjustable Single Red Stripe , Each

RTS OE Automatic Transmission Modulator Valve, GM TH350, TH400, Adjustable Single Red Stripe , Each

$34.51

Sonnax High Clutch Drum Flange, Powerglide 1.69/1.58 Ratios, Each

Sonnax High Clutch Drum Flange, Powerglide 1.69/1.58 Ratios, Each

$88.62

Sonnax Heavy Duty Forward Clutch Hub, GM, 400, 425, 4L80-E, 4L85-E, Each

Sonnax Heavy Duty Forward Clutch Hub, GM, 400, 425, 4L80-E, 4L85-E, Each

$208.51

TCI Automatic Transmission Rebuild Kit, Pro Super, GM, 700R4, Kit

TCI Automatic Transmission Rebuild Kit, Pro Super, GM, 700R4, Kit

$839.05

Sonnax Manual Shift Shaft Kit, GM, 4L80-E Short '91-'94 W/O Nss, Each

Sonnax Manual Shift Shaft Kit, GM, 4L80-E Short '91-'94 W/O Nss, Each

$47.17