When the case bushing on a TH400 or 3L80 unit is worn, shaft play increases and the surrounding bore and seals take damage that compounds the stock failure, so replacing it is a step that cannot be skipped during a proper rebuild. This listing covers a single case bushing matched to the TH400 and 3L80 platform, which share the same basic architecture across the long production run that started in 1964 and continues in service today.
The TH400 is one of the most widely used heavy-duty automatic transmission designs ever built, and its longevity means units from very different production periods are still being rebuilt regularly. Because the case bore geometry stayed consistent across that run, this bushing fits the application range noted without modification.
This is not a kit. There are no gaskets, seals, clutch discs, steels, Automatic Transmission Filter, or any other components included. If your rebuild calls for additional bushings at other positions, or for a complete overhaul set, those are separate items. Check your rebuild parts list against what you already have before placing this order.
REMCO has worked in automatic transmission parts since 1991. Each part that ships from here is pulled and verified individually before it goes out, and the paperwork that comes with the order reflects exactly what is inside the package. At 1 lb shipped, this is a single-piece order.
Before ordering, confirm the transmission code on the unit is TH400 or 3L80 and that the year of manufacture falls within the 1964-and-up range. If there is any doubt about the code, check the tag on the case or cross-reference the vehicle build records before purchasing.
- A worn case bushing allows shaft movement that accelerates seal and bore wear inside the unit, making this a critical replacement point during rebuild.
- This listing is for the case bushing only. It does not include any seals, gaskets, clutch packs, steels, Automatic Transmission Filter, or other rebuild components. Review your parts list before ordering.
- The TH400 and 3L80 share the same platform, and this bushing is sized and sourced specifically for that case bore, not a generic substitute from a mixed assortment.
- Contents: 1 case bushing. Shipping weight: 1 lb. Single piece, no kit. Confirm quantity needed before ordering, as some rebuilds require more than one bushing position.
- Before purchasing, confirm your transmission code is TH400 or 3L80 and that the build year falls within the 1964-and-up application range covered by this part.
What's in the box
- 1 x Bushing, TH400 Case
Compatible vehicles
- Fits K2500 Panel Delivery 3/4 Ton 4WD [67].
| bushing case 1964-up th400 Automatic transmission |
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