Drivetrain Automatic Transmissions and Components

Sonnax

8HP Zip Kit Valve Body Repair

$157.00

SKU: SUN-SC-ZF8-ZIP

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In Stock
Ships by Aug 5
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INSTALL DIFFICULTY
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Description

The Sonnax 8HP Zip Kit is engineered to address common issues in ZF8HP45/55/70 transmissions, specifically targeting the root cause of oil pressure loss in critical circuits. Symptoms such as broken parts, delayed or harsh engagement, excessive heat, and firm shifts are often caused by worn components within the valve body. This kit provides a solution by sealing these pressure losses and restoring accumulator action. This comprehensive kit includes essential components such as a Pressure Regulator Sleeve, Priming Valve & Seal, multiple internal and external End Plugs with O-rings, an Accumulator Piston Kit, and numerous Solenoid O-Rings. The design focuses on preventing pressure loss within the main line, solenoid regulator, reverse, clutch control, and solenoid apply circuits, effectively restoring proper transmission function. A key benefit of the Sonnax Zip Kit is its ease of installation. It requires no special tools or reaming, allowing for a quick and straightforward repair process. The kit comes with a detailed quick guide providing clear instructions, ensuring efficient sealing of the unit. Additionally, a technical booklet is included, offering valuable rebuilding tips, general technical information, and specific repair options for units with higher mileage or particular complaints that may fall outside the scope of the basic kit. By sealing critical pressure circuits with uniquely designed parts, it aims to extend the life and performance of the transmission, getting the vehicle back on the road quickly and reliably.

MIA's Description

The Sonnax 8HP Zip Kit is a differential and rear-end component designed to seal critical pressure losses in ZF8HP45/55/70 valve bodies. It addresses symptoms such as broken parts, delayed engagement, excess heat, firm shifts, and harsh engagement caused by loss of oil pressure due to worn components. This kit contains uniquely designed parts to prevent pressure loss in main line, solenoid regulator, reverse, clutch control, and solenoid apply circuits.

The kit includes a Pressure Regulator Sleeve, Priming Valve & Seal, internal and external end plugs with O-rings, an Accumulator Piston Kit, and solenoid O-rings. Installation is quick and requires no special tools or reaming, with clear instructions provided on a single sheet. The kit also comes with a technical booklet offering rebuilding tips and additional repair options for higher mileage units.

Fitment

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Specifications

BrandSonnax
Part NumberSUN-SC-ZF8-ZIP
CategoryDrivetrain

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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