GM TH200-4R DIRECT DRUM (LOADED)
The GM TH200-4R transmission direct drum (loaded) is a crucial component designed for all 1981–1990 General Motors TH200-4R automatic transmissions. Because this transmission features a dual-pattern bellhousing, it fits a wide variety of GM rear-wheel-drive vehicles equipped with Chevrolet, Buick, Oldsmobile, and Pontiac engines.
Common Vehicle Applications (1981–1990)
The TH200-4R was widely used in the following vehicles, which are prime candidates for this direct drum:
The TH200-4R was widely used in the following vehicles, which are prime candidates for this direct drum:
- Buick: Grand National, T-Type, GNX, Regal, Electra, Estate Wagon
- Chevrolet: Monte Carlo SS, Caprice, Impala, Malibu, El Camino
- Oldsmobile: 442, Cutlass Supreme, Delta 88, 98, Custom Cruiser
- Pontiac: Trans Am (1989), Parisienne, Grand Prix, Safari Wagon
- Cadillac: Fleetwood, Deville, Brougham
- Other: 1982-83 Jaguar XJ6 (with GM engine)
Key Features and Technical Fit
- Years: 1981–1990
- Compatibility: Fits 27-spline input shafts
- Upgrades: Loaded drums often include high-performance friction clutches (e.g., Alto Red Eagle) and Kolene steels to improve holding power, often increasing from a stock 3-5 clutch count to 8, reducing heat and stress in high-performance applications.
- Application Note: This drum fits vehicles needing to support over 300 ft-lbs of torque, particularly in performance-built 200-4R units.
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