AW4 Overhaul Kit 1985-2000, new and ready to install. Fits the AW4. Ships fast from the USA.
This is the early-design soft-parts kit for the Aisin Warner four-speed automatic: the AW4 behind the 4.0L and 2.5L in the Jeep Cherokee XJ, Comanche and Wagoneer, and its Toyota twin, the A340E, A340F and A340H. It is a Toledo kit, part number 97002, dated 1985-2000. Most people searching for it have one of three problems: an XJ dripping red fluid from the bellhousing or tailshaft, a transmission that hesitates before it picks up Drive or Reverse on a cold morning, or an AW4 that is already on the bench and needs every piece of rubber and paper renewed before it goes back in.
The AW4 is an electronically shifted, hydraulically applied gearbox. The front pump makes line pressure, the valve body routes it, and that oil is carried into the spinning direct, forward and overdrive drums through sealing rings, where it pushes on rubber-sealed pistons to clamp the clutches and brakes. When those seals harden after decades of heat cycles, pressure leaks past them and the clutches slip. This kit replaces that sealing layer: the gaskets, lip seals, O-rings, piston seals, sealing rings and small rubber parts needed to reseal the case and every internal circuit. It does not contain friction plates, steel plates, the 2nd coast band or a filter, so a unit with burnt clutches needs those added. The AW4 master rebuild kit bundles frictions and steels with the seals if you would rather buy it all at once.
The AW4 is also known for shift solenoid faults and neutral safety switch trouble. A solenoid fault usually shows as a sudden loss of gears or a stuck gear rather than a gradual slip, and new seals will not fix it.
Check the fluid level hot, then look at color and smell. Clean red fluid with a leak points at seals and gaskets; dark fluid with a burnt smell and friction material in the pan means the clutch packs are worn and a reseal alone will not hold. Our ATF color and smell chart walks through what each condition means. Degrease the case and run the Jeep to find where the wet starts before you pull anything, and if you are weighing a full rebuild against a used unit, read the rebuild versus replacement cost guide first.
The kit is listed for the AW4 and the Toyota A340 family, 1985-2000. On the Jeep side that covers the AW4-equipped Cherokee XJ, Comanche MJ and XJ-based Wagoneer through the 2000 model year. On the Toyota side it covers A340 units built before the late-2000 redesign. The A340 changed partway through 1999 and 2000 depending on the truck, so Toyota owners should match the old pan gasket and valve body gaskets to the new ones or send us the year and VIN; later trucks take the 2000-up revision kit. You can see every AW4 and A340 part we carry on the Aisin transmission parts page.
| Fits | AW4 1985-2000 |
| Part type | Overhaul 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.
No. It is the gasket and seal set: gaskets, seals, O-rings, sealing rings and small rubber parts. Frictions, steels, the band and the filter are separate. If your clutches are burnt, add a friction kit or buy the AW4 master rebuild kit instead.
The kit is dated 1985-2000. The 2001 XJ was the last AW4 year and is not inside that range, so send us your VIN and we will confirm before you order.
It fits A340 units built before the late-2000 redesign. Toyota changed the A340 at different build dates per truck, so compare your old pan and valve body gaskets with the new ones or send the year and VIN.
The Jeep overhaul manual calls for Mercon automatic transmission fluid, with Dexron II as the alternative. Use a quality Dexron/Mercon type ATF and check the level hot.
A front seal can be replaced with the transmission out of the Jeep, but the pump O-ring and bushing are often the real cause. If the pump is coming apart anyway, this kit has the seals to reseal it properly.
