8HP70 Transmission Master Rebuild Kit with Seals

An overhaul gasket and seal kit for the ZF 8HP70 and 8HP75 eight-speed automatic. It carries the case and pan gaskets, the shaft and drum lip seals, the sealing rings and the O-ring package needed to close a unit back up after a teardown. Order clutch frictions and steels separately if the packs are burnt; this kit is the seal side of the job.

Fitment across the 8HP70/8HP75 family is broad. BMW: 3 Series, 5 Series and 5 GT, 6 Series, 7 Series, X3, X5 and X6 in both rear-drive and xDrive, 2.0L through 4.4L. Jaguar: XF, XJ and XK. Land Rover: Discovery (LR3) and Range Rover Sport 4.4L. Also Aston Martin DB9 and DBS 5.9L and Rolls-Royce Ghost 6.8L. Confirm the transmission code stamped on the bell housing before ordering, because the 8HP45, 8HP70 and 8HP90 share a family but not every seal size.

Most 8HP units land on the bench for one of three reasons: a leak at the mechatronic sleeve or the pan gasket, a shudder under light throttle from a worn torque converter clutch, or delayed and harsh engagement after a long fluid-neglect interval. The 8HP is sensitive to assembly cleanliness, so flush the cooler and lines, keep the valve body covered while you work, and lubricate every new lip seal with clean ATF of the correct spec before it goes over a shaft. Torque the pan and use the fluid level fill procedure at the specified fluid temperature on refill, not a dipstick reading.