A worn extension housing bushing at 1.690 in. inside diameter allows the output shaft to walk off center, destroying the rear seal and sending fluid onto the driveshaft before the underlying bushing problem is even diagnosed. This single bronze bushing is the correct replacement for A518, A727, A618, 42RE, 40RH, and 42RH automatic transmission units, covering production from 1972 forward.
Bronze is the right material for this location. It conforms slightly under load without galling the shaft surface, and it holds its shape through the heat cycles that the extension housing sees during normal operation. The 1.690 in. inside diameter is the dimension that matters at installation: verify your housing bore accepts this size before pressing the bushing in.
This listing is for one bushing. It does not include the extension housing seal, output shaft, gaskets, or any other hardware. If you are doing a full rear seal job, source those parts separately and confirm their dimensions against what you pull out.
REMCO has been in automatic transmission parts since 1991. Each order is packed individually, checked against its parts list, and that list ships inside the box so you can verify the piece count on arrival. At 1 lb, this bushing ships as a single unit with no extra packaging weight.
Always confirm the unit code on the transmission case itself. Vehicle year and engine size do not identify the transmission model uniquely enough. The unit code must match A518, A727, A618, 42RE, 40RH, or 42RH for this bushing to apply.
- Worn extension housing bushings cause output shaft wobble and seal failure, leading to fluid leaks and drivetrain vibration that worsen over time if not addressed.
- This listing covers the extension housing bushing only. It does not include output shaft seals, gaskets, Automatic Transmission Filters, bands, or any other components. Review your parts list before ordering.
- Bronze construction holds tighter tolerances at the output shaft bore than softer alloys, resisting wear under the continuous rotation and load that this position sees in service.
- One bronze bushing, 1.690 in. inside diameter, weighing 1 lb. Fits the extension housing on A518, A727, and A618 automatic transmission units built from 1972 onward.
- Before ordering, confirm the transmission unit code stamped on your unit matches A518, A727, A618, 42RE, 40RH, or 42RH. Year of vehicle alone is not enough to verify fitment.
What's in the box
- 1 x Bushing, A727 A518 A618 Extension Hsg [1.690" Id][bronze]
Compatible vehicles
- Fits Ram 1500 1/2 Ton - Pickup [04-06], Ram 1500 1/2 Ton - Van [03-07], Ram 2500 Mega Cab 3/4 Ton - Pickup [06-07], Ram 2500HD 3/4 Ton - Pickup [04-07], Ram 3500 Mega Cab 1 Ton - Pickup [06-09], Ram 3500HD 1 Ton - Pickup [03-09], Ram 4500HD Pickup [05-07].
| bushing extension hsg (1.690id)(bronze) a727 a518 a618 Automatic transmission |
Default Title |
|---|