850RE Transmission Filter and Metal Pan Gasket Kit 68417054AA

If you are servicing the 8-speed automatic in a 2018-2022 Jeep Wrangler JL or a 2020-2023 Gladiator JT, this is the filter and metal pan gasket kit that replaces Mopar 68417054AA and 68417054AB. The 850RE is the version of the ZF 8HP75 built for these trucks, and owners usually go looking for this kit for one of three reasons: the fluid has gone dark after towing or wheeling, the pan is coming off to fix a weep, or the transmission is being opened for a clutch or valve body repair and needs a clean filter before it goes back into service.

What the filter and pan gasket do in an 850RE

The 850RE draws its fluid from the pan through a suction filter that plugs into the bottom of the valve body. Everything the pump sends to the valve body, the converter and the five shift elements passes through that filter first, so it is the only thing standing between wear material and the solenoid bores. On this unit the filter is a separate part rather than molded into a plastic pan, which is why this kit is a filter plus a gasket and not a whole pan. The metal pan gasket seals a large flange with 13 bolts, and a gasket that has been reused too many times is a common source of a slow drip that coats the skid plate.

Symptoms that point to a filter and fluid service

• Fluid that is dark or smells burnt at the fill plug, especially on a truck that tows or runs oversize tires
• Slow engagement into Drive or Reverse after the truck sits
• A pump whine that rises with engine rpm, which can mean the filter is restricting flow
• Fluid weeping from the pan flange onto the skid plate
• Higher than normal transmission temperatures on a scan tool during long climbs

How to confirm before you buy

Check the level and condition first, then pull the pan and read the magnet. A light grey paste is normal wear. Flakes of friction material or a slurry of metal is not, and on these trucks it deserves a scan for codes before you call the job finished. Stellantis issued a D clutch repair bulletin for 2020-2023 trucks with the 850RE that is triggered by P0733-00, P1DA8-00 or P1D92-00 with the check engine light on. A new filter will not fix a failing D clutch. Our ZF 8HP filter and pan service guide covers what you should and should not see in the pan, and 8HP common problems and fixes explains which symptoms point past the filter to hard parts.

Fitment

The kit is listed for the 850RE in the 2018-2022 Wrangler JL and the 2020-2023 Gladiator JT. The 850RE carries sales code DFT on the build sheet, which is how the Stellantis bulletin identifies it, so that is the quickest check. Jeep has used more than one pan and gasket style on these trucks, so compare the gasket shape and the OE number on your old parts before ordering. If you are unsure, send us your year and VIN and we will check it. Other ZF eight-speed parts are in the ZF 8HP collection, and if you work on a Ram, Durango, Grand Cherokee or Charger with the 8HP70 instead, the 8HP70 pan, filter and ATF kit is the one built for those.

Install notes

• Park the truck level, drain, then loosen the pan bolts working crosswise from the center out so the flange does not warp.
• Pull the old filter straight down and make sure its seal came out with it. A seal left in the valve body bore will stop the new filter from seating and lets the pump suck air.
• Clean the pan, the magnet and the case flange, then fit the new gasket dry.
• The Stellantis bulletin for this transmission torques the 13 pan bolts to 10 N-m (89 in-lb). Run them in by hand first, then torque crosswise from the center out.
• Refill with the fluid the bulletin lists for the 850RE, Mopar 68218925AB, or a ZF-approved equivalent. Do not add additives.
• Set the level at the fill plug with the engine running and the fluid between 30 and 50 C on a scan tool. Hold 2,000 rpm for about 30 seconds to fill the converter, cycle through P, R and D, then let it drip down to single drops before closing the plug.

If the fluid you drained was badly burnt, plan on a second drain-and-fill after a few hundred miles. A single pan drop only replaces part of the fluid, because some stays in the converter and cooler.

Will this kit fit a 2019 Wrangler JL?

It is listed for 2018-2022 Wrangler JL models with the 850RE eight-speed automatic. Check that your truck has sales code DFT and compare the gasket shape to the one on your pan, since more than one style has been used. Send us the VIN if you want us to confirm.

Does this kit include the pan or fluid?

No. It includes the transmission filter and a metal pan gasket. You reuse your pan and bolts and supply your own fluid. Stellantis lists Mopar 68218925AB ATF for the 850RE.

What fluid level procedure does the 850RE use?

There is no dipstick. With the truck level and the engine idling, bring the fluid to 30-50 C on a scan tool, hold 2,000 rpm for about 30 seconds to fill the converter, shift through P, R and D, then open the fill plug and add fluid until it runs out. Close the plug once it slows to single drops.

My JL has a P1DA8 code. Will a filter service fix it?

Usually not. P1DA8-00, P0733-00 and P1D92-00 on 2020-2023 trucks are the codes in the Stellantis D clutch repair bulletin, which replaces the D clutch. A filter and fluid service is still worth doing during that repair, but it does not fix worn clutch parts.

How tight should the pan bolts be?

The Stellantis bulletin for the 850RE torques the 13 pan bolts to 10 N-m (89 in-lb). Tighten them crosswise from the center outward.

How often should I change the 850RE filter?

The factory interval is long, but trucks that tow, run large tires or see heavy off-road use run hotter and wear the fluid faster. Change it any time the fluid is dark, whenever the pan is off for a leak, and after any internal repair.

• ZF 8HP Filter and Pan Service
• ZF 8HP Common Problems and Fixes
• ZF 8HP High-Mileage Service Checklist
• ZF 8HP Jeep Grand Cherokee Common Problems