8HP45 Banner Rebuild Kit, new and ready to install. Fits the 8HP45. Ships fast from the USA.
If your BMW 3 Series, 5 Series, X3 or X5 with the 4- or 6-cylinder 8-speed is flaring between gears, or your Charger, Challenger, 300 or Ram 1500 with the 3.6L and the Chrysler-built 845RE has started to slip and the fluid smells cooked, you are past the point where a valve body kit or an adaptation reset will help. The clutch material itself is worn. This new 8HP45 banner rebuild kit is the soft-parts package for that job: an overhaul set of seals and gaskets together with new friction plates, so the clutch packs can be rebuilt instead of replaced as modules.
ZF built the 8HP around four planetary gear sets and only five shift elements: three multi-disc clutches and two brakes. Each gear holds three of them applied and leaves two open, which keeps drag low but also means every element works hard across the eight ratios. When one pack loses friction material, the transmission control unit sees the ratio drift, keeps adding pressure to compensate, and eventually logs a ratio fault or drops into limp mode. A banner kit replaces the parts that wear in normal service, the frictions and the rubber that seals each piston, while you reuse the steels, drums and planetaries if they measure good.
Most 8HP complaints are not burnt clutches. Low fluid after a previous service, worn valve body bores and mechatronic sleeve leaks all produce the same harsh or slipping feel, and they are far cheaper to fix. Check the level with the correct procedure first, then read live slip data per shift element with a capable scan tool. If one element shows slip while the others hold, and the fluid carries friction debris, a teardown with this kit is justified. Our ZF8HP rebuild cost breakdown walks through how to tell a reseal job from a full internal rebuild, and the ZF8HP common problems guide covers the faults that mimic clutch failure.
This kit is listed for the first-generation 8HP45 and its Chrysler-built twin, the 845RE. The application guide it ships against covers BMW 1 Series (2010-2011), 3 Series (2011-2015), 5 Series (2009-2011), X1, X3 (2011-2015), X4 and X5 with the smaller engines, along with some Jaguar 3.0L applications. On the Chrysler side the 845RE sits behind the 3.6L V6 in the Charger, Challenger, 300 and Ram 1500.
Generation matters. The second-generation 8HP50 and 850RE replaced the B brake release circuit with a return spring and added wave springs between the A and B brake steels, so Gen 2 internals do not match this kit. Read the transmission code on the case tag, and if you are unsure send us your year and VIN before ordering. Every unit we carry for this family is on the ZF 8HP collection page.
If the valve body bores are worn, pairing this rebuild with a ZF8HP shift kit keeps the new clutches from being cooked by the same pressure problem that may have killed the old ones.
| Fits | 8HP45 |
| 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.
Yes. The 845RE is Chrysler's build of the first-generation 8HP45 and the kit is listed for both. It does not fit the second-generation 850RE or 8HP50, which use different B brake and A/B brake spring hardware.
It is a friction overhaul kit: new frictions with the seals and gaskets for the rebuild. Plan to measure and replace steels separately if yours are heat-marked, and buy the pan and filter for the final service.
Look for friction debris in the pan and slip on one specific shift element in live data. Harsh shifts with clean fluid usually trace to valve body bore wear or low fluid, which a reseal or shift kit fixes for less.
ZF LifeguardFluid 8. A dry unit takes about 9.5 quarts. Fill through the side plug and set the final level with the engine running in the specified temperature window.
Yes. Reset the adaptations with a scan tool, then drive through all eight gears under light and moderate throttle so the control unit can relearn clutch fill. Expect firm shifts until it does.
