Spring Kit / Heavy Duty 1-20 Accumulator Spring Kit / Ford 4r70e / 4R70W / 4r75e / 4R75W (2001-up) (oe# 1l3z-7f284-aa & 1w7z-7f284-aa)

Sonnax Heavy Duty 1-20 Accumulator Spring Kit for Ford 4R70E, 4R70W, 4R75E, 4R75W Transmissions (2001-Up)

Restore proper shift feel and accumulator function with this Sonnax Heavy Duty 1-20 Accumulator Spring Kit, engineered specifically for Ford 4R70E, 4R70W, 4R75E, and 4R75W automatic transmissions from 2001 and up. This direct-fit spring kit replaces the factory accumulator springs with heavy-duty components designed to handle increased line pressure and demanding driving conditions. Whether you are rebuilding a transmission or addressing accumulator-related shift issues, this Sonnax kit delivers reliable, long-lasting performance.

Key Features

• Heavy-duty accumulator spring kit engineered by Sonnax for Ford 4R70E, 4R70W, 4R75E, and 4R75W transmissions
• Designed to replace OE accumulator springs and restore consistent shift quality under higher line pressures
• Direct-fit replacement for OE part numbers 1L3Z-7F284-AA and 1W7Z-7F284-AA
• Ideal for transmission rebuilds, performance upgrades, and accumulator-related shift complaints
• Manufactured by Sonnax, a trusted name in transmission hard parts and valve body components

Compatibility

This Sonnax accumulator spring kit is compatible with Ford vehicles equipped with 4R70E, 4R70W, 4R75E, and 4R75W automatic transmissions from 2001 and newer. It is a direct replacement for OE part numbers 1L3Z-7F284-AA and 1W7Z-7F284-AA. Please verify your transmission model and year before ordering.

Why Choose This Part?

Sonnax is a leading manufacturer of transmission components, and this heavy-duty accumulator spring kit is built to deliver dependable performance when OE springs fall short. If you are rebuilding a 4R70W or 4R75W transmission or chasing down accumulator-related shift concerns, this kit provides a proven solution. Order now and get your Ford transmission shifting right again.