C6 E4OD 4R100 [66-UP] Automatic Transmission Bushing Sun Gear (Primary)

When the sun gear primary bushing wears down, the gear no longer stays true in its bore, and the resulting misalignment works against every other component in that section of the automatic transmission. This single bushing, is selected for 4R100, E4OD, and C6 units covering applications from 1989 forward, and it addresses exactly that wear point at the primary sun gear position.

The primary sun gear carries rotational load continuously during normal operation. A bushing in good condition keeps that gear centered so the load path stays clean and predictable. Once the bushing wears, end play open up, the gear tilts slightly under load, and the surfaces around it begin to wear at a rate the rest of the rebuild work cannot compensate for. Fitting a new bushing at this location restores that centered support before the damage spreads to harder-to-replace parts.

This is a single-piece listing. It does not include clutch discs, steels, seals, an Automatic Transmission Filter, a band, or any other rebuild component. If you are sourcing individual parts for a targeted repair, confirm that this bushing is the specific piece missing from your work before placing the order.

At REMCO, parts like this are pulled and verified individually against the part record before they leave the facility, a process that has been in place since 1991. The shipped weight is 1 lb. Before ordering, locate the transmission model code on the unit itself and verify the model year of the application falls within the 1989-to-present range listed for.

• A worn sun gear bushing lets the gear assembly shift off-center, causing heat buildup and accelerated wear on surrounding components; replacing it stops that damage path before it spreads.
• This listing is for one bushing only. It does not include any seals, clutch packs, steels, bands, Automatic Transmission Filters, or rebuild kits. Confirm this is the specific piece you need before ordering.
• The primary sun gear position takes direct rotational load every time the unit shifts; this bushing holds that gear in alignment so the load transfers evenly rather than grinding against the housing wall.
• One sun gear primary bushing, 1 lb shipped weight. The part number for this unit is, and it is selected for 4R100, E4OD, and C6 automatic transmission applications.
• Before ordering, verify the transmission model code on your unit directly, not only from vehicle paperwork, and confirm the model year falls within the 1989-to-present application range for this bushing.

What's in the box

• 1 x Bushing, C6 E4OD 4R100 Sun Gear

Compatible vehicles

• Fits LTD [67-75], Thunderbird [66-75], E100 1/2 Ton Econoline - Van [68-75], E100 1/2 Ton Econoline Club Wagon [68-75], E250 3/4 Ton Econoline - Van [75], E250 3/4 Ton Econoline Club Wagon [75], E350 1 Ton Econoline - Van [75], F100 1/2 Ton - Pickup [68-75], F150 1/2 Ton - Pickup [75], F250 3/4 Ton - Pickup [68-75], F350 1 Ton - Pickup [65-75], Ranchero [68-76].