TH400 Rear Case Bearing

The TCI TH400 Rear Case Bearing is a precision roller-type thrust bearing assembly designed for Turbo 400 transmissions. This bearing kit manages end-play at the rear of the transmission case, a critical function that prevents crankshaft walk and maintains proper alignment under load. Supplied with three selectable steel washers in 0.010, 0.015, and 0.020-inch thicknesses, this bearing allows technicians to dial in exact clearance specifications during rebuild or diagnostic work.

TH400 rear case thrust bearing assemblies operate in one of the harshest environments within the transmission—constant radial loads, temperature cycling, and fluid exposure demand materials engineered for durability. The steel roller construction in this TCI kit resists wear and spalling better than softer alternative materials, extending service life in both stock and modified powertrains. The three included washer options enable builders to match OEM specification or compensate for wear on mating surfaces, reducing the need to source multiple kits during a single rebuild.

This bearing assembly is essential for transmission rebuilders, performance shops, and serious DIY enthusiasts working on TH400 units in street, strip, or towing applications. Proper rear case bearing selection and end-play adjustment prevents transmission failure caused by case-to-crankshaft contact, particularly critical when running high-torque engines or aggressive shift programming. The TCI 224400 kit consolidates everything needed for correct installation into a single, compact package.

TCI (Transmission Control Inc.) is recognized within the transmission aftermarket for producing OEM-quality replacement and upgrade components. The TH400 remains the gold standard three-speed automatic in classic cars, hot rods, and heavy-duty trucks, making reliable bearing assemblies a baseline requirement for any serious rebuild project.