Pure Drivetrain 8HP90 High Performance Transmission Hard Parts Kit - RWD - Stage 2
If you own a Hellcat-powered Charger or Challenger, a V12 BMW 760Li, or another rear-drive car with the ZF 8HP90, you already know the transmission is strong in stock form. The trouble starts when the supercharger pulley shrinks and the boost goes up. Typical signs are flare between gears at full throttle, slip in the middle gears on a long pull, and clutch material collecting in the pan after repeated launches. The Pure Drivetrain Solutions 12-84-2000 is the Stage 2 hard parts kit for the RWD 8HP90, built so the clutch packs and hubs inside the case can keep up with a modified engine.
The 8HP90 is the heavy-duty member of ZF's first 8HP generation, rated for up to 1,000 Nm of input torque. Like every 8HP it uses two brakes and three clutches, applied two at a time, to make eight forward ratios, so holding power is set by clutch area, friction material and the strength of the hubs that drive each pack. Pure Drivetrain replaces those wear and load parts with its own: FSR paper friction plates, C6X steels and pressure plates, and billet 7075 hubs that are heat treated and hard anodized. According to the manufacturer, the hubs have more oil passages for cooling and lubrication, a corrected tooth profile where the clutches engage, and a longer base shoulder supporting the clutch base plates. The C6X steels carry a carbon surface layer meant to stop hot spots and coning, and the FSR frictions are built for high grip without low-speed shudder.
The HPK comes in Stage 1 and Stage 2. This Stage 2 kit is the higher-capacity of the two, aimed at cars making well beyond factory power. Pure Drivetrain requires fitment confirmation before an order, so be ready with your case information.
Check the fluid level hot first, since a low 8HP will slip on its own. Then scan for codes, read the clutch adaptation values, and look in the pan for friction material. Our Dodge Charger 8-speed common problems guide walks through the usual Charger and Challenger failures, and Charger shift problem diagnosis covers the tests that separate a hydraulic or software fault from worn clutches. A sticking solenoid or worn valve body bore will not be cured by new frictions.
This kit is listed for the rear-wheel-drive ZF 8HP90. Known RWD 8HP90 applications include 2015-up Hellcat Charger and Challenger models, the F01 BMW 760Li with the N74 V12, and Rolls-Royce Ghost and Wraith. The 8HP90 is a first-generation unit; it is not the same as the second-generation 8HP95, and Audi's 0BL version of the 8HP90 has many differences from the BMW and Chrysler cases. The model is stamped on the rear of the transmission case, so read it and send us the stamping plus your year and VIN. If the case reads 8HP95 and the car is AWD, use the 8HP95 AWD Stage 2 hard parts kit instead. Browse all 8-speed parts on our ZF 8HP collection page.
| Brand | Pure Drivetrain Solutions |
| Part number | 12-84-2000 |
| Fits | Pure Drivetrain 8HP90 High Performance Transmission Hard Parts Kit - RWD - Stage 2 |
| Type | Transmission Rebuild Kits |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
Rear-drive Hellcat Challengers use the 8HP90, which this kit is listed for. Confirm the stamping on the rear of your transmission case and send your VIN before ordering, since some later or AWD models use other variants.
Audi's 0BL version of the 8HP90 has many differences from the BMW and Chrysler units. Do not assume it fits; send the case stamping so it can be checked first.
Pure Drivetrain FSR friction plates, C6X steels and pressure plates, and heat treated, hard anodized billet 7075 hubs. Gaskets, seals and fluid for the rest of the rebuild are separate.
Stage 2 is the higher holding-capacity version of the kit. It suits heavily modified cars; tell us your power level so the stage matches your build.
Yes. Reset adaptations, run the quick learn, and drive at least 500 miles of mild stop-and-go through all gears before any full-power run.
