Overview
The Omix-ADA T90 transmission gasket kit, part number 18804.01, is a gasket kit for T90 and T18 transmissions in Jeep and Willys models from 1946 to 1971. It is built to original specifications and works as a direct OE replacement.
Fitment covers Willys, CJ, DJ, FC, Gladiator, J-series, Jeepster, Tornado, Utility and Wagoneer (SJ) models from 1946 to 1971. Check the kit contents against your transmission before starting.
Key features
- Gasket kit for T90 and T18 transmissions
- Built to original specifications
- Covers Jeep and Willys models from 1946 to 1971
- Omix-ADA part number 18804.01, UPC 804314016401
Gasket replacement tips
Transmission gaskets seal joints where housings, covers and cases meet, so the sealing surfaces matter as much as the gasket itself. Clean every mating face down to bare metal and check for warping or nicks before fitting new material. Using sealant only where the gasket design calls for it helps prevent blocked fluid passages and squeeze-out inside the case.
Older Jeep transmissions often show leaks at the shift cover, the side cover and the rear seal area first. When a gasket is replaced, the seals and bearings around the same opening are commonly inspected at the same time, since working on them later means a second teardown.
- Clean all sealing surfaces before installing new gasket material
- Check covers for warping with a straightedge
- Replace the rear seal when the case is open
Specifications
| Brand | Omix-Ada |
|---|---|
| Part number | 18804.01 |
| UPC | 804314016401 |
| Transmission | T90 / T18 |
| Model years on fitment | 1946–1971 |
| Warranty | Limited five year warranty |
Vehicle fitment
Covered models:
- Willys 1-Ton, CJ-2, CJ-3, CJ-5, CJ-6, DJ-3, Jeepster, Panel, Sedan Delivery and Utility Wagon models, 1946–1958
- Jeep CJ3, CJ5, CJ6, DJ3, DJ6, Commando, Universal and Jeepster models, 1959–1971
- FC150, FC170, FC170HD, Gladiator, J-100, J-2500 through J-4800, Tornado, Utility and Wagoneer (SJ) models, 1958–1971
The fitment includes no Wrangler (YJ or TJ) models and no 2020–2022 Gladiator (JT); the Gladiator listed is the 1963–1967 truck. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Confirm your transmission is a T90 or T18 before fitting the kit.
What’s included
Check the package contents against your transmission’s needs before starting.
