ZF8HP Banner Rebuild Kit, new and ready to install. Fits the ZF8HP. Ships fast from the USA.
This kit is the rubber and paper side of an 8HP70 overhaul: new piston seals, sealing rings, lip seals and gaskets for a ZF 8-speed that is coming apart on the bench. Buyers usually land here with a BMW 5 Series, 7 Series, X5 or X6, a Jaguar or Range Rover V8, or a Ram 1500 5.7L that is leaking, losing apply pressure on one clutch, or already out of the vehicle for a rebuild. Note what it is and what it is not: this is a gasket and seal overhaul set, part T21802C. It does not include friction plates, steels or a filter, so it suits a reseal of a unit whose clutches still measure good, or a rebuild where you are sourcing frictions separately.
Every gear in the 8HP is made by applying three of its five shift elements with oil pressure. Each of those clutch and brake pistons depends on molded seals to hold that pressure, and the case, housings and covers depend on gaskets and lip seals to keep the oil inside. Seals harden with heat cycles. Once one leaks internally, the affected clutch fills slowly, slips under load, and the control unit raises pressure to compensate until it runs out of adaptation room. This set replaces those sealing parts in one purchase. The rings are mostly FKM fluoroelastomer with some ACM, both chosen for heat and ATF resistance, along with oil seals and fiber gaskets.
Find the leak before you buy parts for it. On many BMW applications a puddle under the transmission comes from the cooler line connections on the outside of the case, which BMW addressed in a service bulletin with new lines and seals, not an internal reseal. Clean the case, add UV dye if needed, and track the wet spot to its highest point. For internal leakage, scan tool slip data on each shift element tells you which circuit is losing pressure. Our ZF8HP common problems guide separates seal leaks from mechatronic sleeve wear, and the rebuild cost guide explains when a reseal is enough and when the job grows.
The kit is made for the first-generation 8HP70. Its application guide, which the manufacturer marks as reference only, lists BMW 3, 5, 6 and 7 Series and X3, X5 and X6 models from roughly 2009-2011, Jaguar XF, XJ and XK, Land Rover Discovery and Range Rover Sport V8 models, and Chrysler/Dodge 8-speed applications. Many of those vehicles used other 8HP variants in later years, so the case tag is the real fitment check, not the model name. Gen 2 units (8HP75, 850RE) changed internal hardware and should be confirmed before ordering. Send us the year and VIN if you are unsure, and see the full ZF 8HP parts collection for matching hard parts.
If teardown shows burnt frictions on an 8HP45 instead, our 8HP45 banner rebuild kit includes the friction plates this seal kit leaves out.
| Fits | ZF8HP |
| Part type | Banner Rebuild Kit |
| Condition | New |
| Brand | OEM |
| Ships | From the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
No. It is an overhaul gasket and seal kit (T21802C) only. Order frictions, steels and a pan filter separately if your clutches or filter need replacing.
It is made for the first-generation 8HP70 used by BMW, Jaguar, Land Rover and Chrysler/Dodge. Confirm the code on your transmission case tag, or send us your year and VIN.
Not always. BMW issued a service bulletin for leaks at the transmission cooler line connections on several 8HP models. Rule that out with a clean case and dye before tearing the unit down.
ZF LifeguardFluid 8. Fill through the side plug, then set the final level with the engine running and the fluid in the specified temperature range.
Yes. Reset the transmission adaptations with a scan tool and complete a relearn drive so the control unit learns the new clutch fill times.
