The TH350 was the automatic transmission of choice for many of the legendary muscle cars of the 1960s and 1970s. Its ability to handle the immense power and torque of engines like the Chevrolet small block V8 and the Pontiac 400 made it a key component in these performance machines. * **Fluid and Filter Changes:** Regular transmission fluid and filter changes are essential. The recommended interval is every 30,000 to 50,000 miles depending on driving conditions.

Design and Operation

2. High-Stall Torque Converter

1. Shift Kit

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2. High-Stall Torque Converter

1. Muscle Cars

The planetary gearset is controlled by a series of clutches and bands, which are hydraulically actuated by the valve body. Each clutch or band engages or disengages to change the gear ratio within the planetary gearset, resulting in a shift from one gear to another. The planetary gearset is the primary mechanism responsible for shifting gears in the TH350. It consists of three sets of gears: a sun gear, a ring gear, and a planet carrier with multiple planet gears. These gears work together to create different gear ratios, allowing the transmission to optimize power delivery based on speed and load. * **Address Unusual Noises:** Pay attention to any unusual noises or vibrations coming from the transmission, which could signal that something is wrong.