6HP26 Master Rebuild Kit 2004, new and ready to install. Fits the 6HP26. Ships fast from the USA.
A 2004 ZF 6HP26 is now one of the oldest six-speeds on the road, and most of them have spent their whole life on the original fill. In BMW V8 models of that era and in Jaguar's 4.2 V8 cars, the usual end point is the same: a slip on the upshift under load, a thump into gear, burnt fluid and seeping seals. When a fluid change no longer helps, this new master rebuild kit for 2004 units supplies the frictions, steels, seals and gaskets to overhaul the whole transmission in one job. It carries a 1-year warranty.
The 6HP26 is the high-torque version of ZF's first six-speed, rated for about 600 Nm. It uses the same Lepelletier layout as the smaller units, a single planetary ahead of a Ravigneaux set, shifted by three clutches and two brakes, but each pack carries more plates to handle V8 torque. The torque converter clutch is designed to run with a controlled slip rather than lock solid, which puts constant heat into the fluid. Over time that heat glazes the frictions and hardens the piston and shaft seals, and the mechatronic keeps raising fill pressures to compensate until it runs out of range. Replacing every friction, steel, seal and gasket together resets the clearances and sealing that the module was designed around.
Check the fluid level and condition first, and pull the case connector to look for ATF wicking past the sealing sleeve, since wet pins on BMW cars cause faults that mimic internal failure. Then read the manufacturer codes and clutch adaptation values. Our BMW 5 Series 6HP common problems guide covers the 545i-type cars, and the Jaguar 6HP common problems guide explains the bush failure behind those codes. If clutch material is in the pan, a rebuild is the fix.
This kit is listed for the 6HP26 in 2004. That year the unit was found mainly behind BMW V8 engines, such as the 545i, 645Ci and 745i, and in Jaguar models with the 4.2 V8. The 6HP26 ran through several updates, and early units differ from later ones in valve body generation and some internal parts, so read the ZF ID tag on the case, compare your old kit numbers, or send us your year and VIN to confirm. If your unit is a later build, our 6HP26 master rebuild kit for 2005-2011 may be the better match. Every part for this family is on the ZF 6HP transmission page.
| Fits | 6HP26 2004 |
| Part type | Master 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.
In 2004 the 6HP26 was used mainly behind BMW V8 engines, such as the 545i, 645Ci and 745i, and in Jaguar models with the 4.2 V8. Confirm with the ZF ID tag on the case or send us your year and VIN.
It is new and carries a 1-year warranty.
This kit covers the frictions, steels, seals and gaskets. The 6HP26 filter is part of the pan, so plan on a new pan and filter, such as our 6HP26 service kit with pan, filter and ATF.
Not always. The 6HP26 was updated several times, so internal parts and the valve body generation can differ. Match your ID tag and old part numbers. For later units, see our 6HP26 master rebuild kit for 2005-2011.
ZF LifeguardFluid 6. Fill through the side plug and set the level at operating temperature, then reset the adaptations with a capable scan tool.
Jaguar Land Rover linked 6HP26 and 6HP28 codes P0729-P0735, P0783 and P2702-P2704 to failure of the lead-free bush. If you are rebuilding a unit with that history, inspect the bushings closely and replace any that are worn.
