8HP45 Valve Body 2013-2017, used and ready to install. Fits the 8HP45. Ships fast from the USA.
A 2013-2017 Charger, 300, Ram 1500, Grand Cherokee or BMW with the ZF eight-speed that thumps on the 2-1 downshift as you roll to a light, engages late into Drive, or shifts harder every month is a classic early 8HP45 valve body complaint. This is a used OEM 8HP45 valve body for that 2013-2017 range, priced well under a remanufactured unit, for a driver or shop that has already diagnosed the valve body and wants a factory casting to bolt in. It is covered by a 1-year warranty.
Chrysler sells this transmission as the 845RE, BMW and the European brands call it the 8HP45, and inside they are the same first-generation ZF design. The valve body sits under the pan with the solenoids mounted to it. The transmission computer controls each solenoid's output pressure, that pressure positions a clutch-control valve, and the valve meters line pressure into whichever of the five shift elements must apply. Gear changes are timed overlaps between one element releasing and another applying, so the valve body is also what makes a shift feel smooth or abrupt. Engagement into Drive and Reverse, converter lockup and every downshift as you slow down all pass through these circuits.
On 2013 Charger and 300 models with the 3.6L and the 845RE, Chrysler issued service bulletin 21-041-14 for a harsh bump on the 2-1 downshift. The bulletin notes that no trouble codes set for this condition, and its repair is replacing the valve body. That makes it worth reading even on a non-Chrysler 8HP45, because it shows that an early valve body can cause a real shift complaint with a clean scan. Before you buy, still check the fluid level hot, look for leaks at the mechatronic sleeve, and rule out a single solenoid with our ZF8HP pressure control solenoid guide. If your main complaint is slow engagement, our ZF8HP delayed engagement guide covers the other causes to eliminate first, and the ZF8HP common problems guide puts it all in diagnostic order.
This valve body is listed for the 8HP45 from 2013 through 2017, which covers the first-generation 845RE in Chrysler, Dodge, Ram and Jeep vehicles and the 8HP45 in BMW and other European models. It is not interchangeable with the second-generation 8HP50 or 850RE, which some applications switched to inside this window, and it is a different part from the heavier 8HP70 and 8HP90 bodies. Because it is a used OEM part, match the casting, the connector and any part number on your old unit against the listing photos, or send us your year and VIN and we will confirm it. Other years and the remanufactured 8HP45 valve body for 2014-2020 are on our ZF 8HP parts page.
A used valve body should go into a clean transmission. Drain the old fluid, replace the pan, which carries the filter on this design, and fit a new mechatronic sleeve with fresh O-rings so the new body is not fed by a leaking passage. Transfer or replace the solenoids according to what your listing includes; a worn 8HP45 pressure control solenoid installed on a good casting will bring the old symptoms straight back. Torque the bolts in sequence to factory spec, refill with ZF LifeguardFluid 8 and no additives, then reset adaptations and drive the car through every upshift and coast-down so the computer can learn the new body. Plan on a short relearn drive before judging shift quality.
| Fits | 8HP45 2013-2017 |
| Part type | Valve Body |
| Condition | Used |
| 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.
Those cars use the 845RE, Chrysler's version of the 8HP45, which this valve body is listed for. Confirm with your VIN, since a mismatched calibration or generation will not fix the complaint.
It is the lowest-cost way to replace a worn body with a factory casting. If your vehicle has high mileage or a history of overheating, the remanufactured 2014-2020 unit addresses the wear points before it ships.
It can be. Chrysler bulletin 21-041-14 describes exactly that complaint on 2013 Charger and 300 3.6L models and calls for valve body replacement. Rule out fluid level and leaks first.
No. Those are second-generation units and use a different valve body.
Refill with ZF LifeguardFluid 8, reset the transmission adaptations with a scan tool, and drive through all gears so the computer relearns the new valve body.
