Restoring hydraulic pressure in an A500, 42RE, 40RH or 42RH starts with the sealing rings: when those rings wear, fluid bypasses them and pressure drops across circuits that depend on a tight seal. This listing is a complete set of teflon sealing rings designed for that transmission family, covering applications from 1967 forward.
Teflon is the material of choice here because it maintains its dimensions through repeated heat cycles. Rubber rings harden as automatic transmission fluid temperatures rise and fall across thousands of shift cycles; teflon holds its profile and keeps contact with the bore wall. That difference matters when the rebuilt unit goes back into service and is expected to hold pressure shift after shift.
The set is put together at REMCO, piece by piece, and checked against the parts list before the box is sealed. That list ships inside the box so the technician can verify the count on the bench before the job begins. REMCO has been working in automatic transmissions since 1991, and every order goes through the same verification step regardless of the part.
This listing covers sealing rings only. It does not include friction discs, steels, Automatic Transmission Filter, bands, gaskets, or any other overhaul components. If your job requires those parts, they need to be sourced separately. Review your teardown notes and confirm the unit code on the case matches one of the units listed here before placing the order. The A500 family includes the 42RE, 40RH and 42RH, but configurations vary by year and application, so confirming the code is the right step before committing to a purchase.
- Worn or cracked sealing rings cause pressure loss and slipping in the A500, 42RE, 40RH and 42RH - replacing them restores hydraulic integrity across the affected circuits.
- This listing covers sealing rings only. It does not include friction discs, steel plates, Automatic Transmission Filter, gaskets, or any other overhaul components - check your parts list before ordering.
- Teflon holds its shape and seals consistently under the heat cycles that automatic transmission fluid generates, unlike rubber rings that harden and lose contact with the bore wall over time.
- One complete set of teflon sealing rings for the A500, 42RE, 40RH and 42RH family. Packaged individually, not as a preassembled bundle. Ships at 1 lb. A parts list is included in the box.
- Before ordering, confirm the exact unit code stamped on your transmission case and the model year of the vehicle - the A500 family spans multiple configurations and not all share the same ring set.
What's in the box
- 1 x Ring Kit, A500 Complete [Teflon]
Compatible vehicles
- Fits Dakota [88-03], Ram 1500 [94-01], Durango [98-00], Grand Cherokee [93-04], Ram 50 [90-93], Ramcharger [90], W150 [89-93], W250 [90-93], D150 [89-93], D250 [90-93], D350 [90-93], B150 [90-94], B250 [88-94], B350 [88-94], B1500 [95-97], B2500 [95-97], Mighty Max [90-96].
| ring kit a500 complete (teflon) 1967-up |
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