Complete master overhaul kit for the ZF 8HP70/8HP75 eight-speed: clutch frictions, steels, gaskets and seals to rebuild BMW, Jeep and Dodge units.
A Grand Cherokee that bangs into gear, a Charger or 300 that slips on the 2-3 upshift, or a BMW X5 that flares under load after 120,000 miles: when the clutch packs inside a ZF 8HP70 are worn, the fix is an overhaul, and this master rebuild kit carries the parts for it. It bundles the friction clutch plates, steel plates, the overhaul gasket and seal set, O-rings and lip seals for the 8HP70 and 8HP75 eight-speed in BMW, Chrysler, Dodge, Jeep, Jaguar, Land Rover and Maserati applications, so the unit can be torn down and rebuilt without sourcing each piece separately.
The 8HP70 is ZF's 700 Nm class eight-speed; the Chrysler 845RE is the licensed version of the smaller 8HP45, so do not confuse the two. The 8HP70 shifts using five shift elements, brakes A and B and clutches C, D and E, and every shift swaps only one element, which is why worn plates show up as flare or slip in particular gears rather than everywhere at once. Each element is a stack of frictions and steels applied by a sealed piston. As the lining glazes and the rubber hardens, the module stretches its adaptation to keep shifts smooth until it can no longer compensate. Renewing all of the plates and all of the seals together resets every element at once instead of chasing one pack at a time.
Rule out the cheaper causes first. Chrysler issued software updates for shift quality, including bulletin 21-018-15 for the 2015 Grand Cherokee SRT 8HP70, so check the calibration. On BMWs with the N20, N26 or N55, bulletin SI B24 02 15 covers fluid loss at the transmission cooler line connections, and a low unit cooks its clutches. Valve body bore wear and a leaking mechatronic sleeve can also feel like slip. If the fluid is correct, the software is current and the pan still shows friction material, the packs are done. The Grand Cherokee shift problems guide and our Charger 8-speed problems guide cover the diagnosis on the Chrysler side.
The listing covers 2011-2016 BMW X3, 2015 X4, 2010-2016 X5 and 2010-2014 X6; 2013-2016 Chrysler 300; 2013-2016 Dodge Charger and Durango; 2011-2016 Jeep Grand Cherokee 3.0, 3.6, 5.7 and 6.4L; 2010-2016 Jaguar XF and XJ and 2011-2014 XK; 2014-2016 Land Rover Discovery and 2010-2016 Range Rover; and 2013-2016 Maserati Ghibli and Quattroporte. Most of those years are first-generation 8HP70 units. Second-generation units (8HP75 and the Chrysler 850RE) differ in places, so count the frictions and steels in each pack as you disassemble and match them to the kit before you build. If in doubt, send us your year and VIN. More parts for these units are on the ZF 8HP collection page.
Inspect every drum, bushing, thrust washer and the pump before reassembly; the kit does not include hard parts, the mechatronic or the converter. A worn input drum is worth replacing now, and an 8HP70 input drum is available if yours is scored. Soak new frictions in fluid, stack each pack in the original order, and set clearance with a dial indicator. Replace the mechatronic sleeve and bridge seals while the case is open, and if any solenoid tested weak, fit the 8HP45/8HP70 solenoid kit at the same time.
ZF specifies Lifeguard 8 fluid. A dry, rebuilt unit takes about 9 liters (9.5 quarts) through the case fill plug, then the level is set hot with the engine idling. Reset adaptations and complete a learn drive so the module relearns the new clutches.
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Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Yes, the listing covers the 2011-2016 Grand Cherokee 3.0, 3.6, 5.7 and 6.4L with the 8-speed. Count the plates in each pack during teardown to confirm the stack matches.
The fitment years listed are mostly first-generation 8HP70 units. Second-generation units differ, so compare the old plates to the kit or send us your year and VIN before ordering.
No. It covers frictions, steels, gaskets, seals and O-rings. The pan and filter, solenoids, mechatronic and hard parts are separate.
ZF specifies Lifeguard 8. A dry, overhauled unit takes about 9 liters (9.5 quarts), filled at the case plug and checked hot with the engine running.
Yes. Clear the old adaptation values and complete a learn drive so the transmission module adjusts to the new clutch packs.
