Rebuilding and Modifying GM Turbo 350 Transmissions for Improved Efficiency

Though not fairly the heavy-duty performer as its large brother, the Turbo 400, the Turbo 350 transmission is a positive, sturdy, succesful, and when modified, stout performer in its personal proper. Tens of millions of GM vehicles and vans have been constructed with Turbo 350 computerized transmissions. There at all times comes a time when the outdated transmission reveals indicators of wear and tear. Sooner or later, even the most effective transmissions must be rebuilt.

Join automotive expert Cliff Ruggles as he walks you through the intricate process of rebuilding and modifying InGM Turbo 350 Transmissions. With clear instructions and detailed full-color images, Ruggles covers everything from removal and installation to tear-down, parts inspection, and performance enhancements. Learn time-saving tips and tricks alongside step-by-step rebuild procedures and shift kit installations. Dive into GM's popular rear-wheel-drive automatic transmission with Ruggles's proven techniques for enhancing efficiency and power.

If you're puzzled by computerized transmissions, fear not! Even if you choose to entrust your transmission rebuild and performance upgrades to a professional, the insights shared in this guide are crucial for grasping how power flows from your engine to the wheels. Enhance your automotive knowledge by adding a copy of "GM Turbo 350 Transmissions: How to Rebuild & Modify" to your collection today.

From the Writer

Transmission Fundamentals

Meeting

Verify the endplay on every pinion as proven. Additionally spin every pinion and wobble them forwards and backwards. If endplay is past .050 inch, if you happen to really feel any tight spots, or whether it is free on the pins, you need to substitute the planetary meeting.

Shift Equipment Set up

Take away the help plate after which take away the manufacturing facility separator plate. If the transmission is within the car, you can find 4 examine balls above the plate. They won’t be reused as a result of the TransGo shift package accommodates new examine balls.

Efficiency Mods

The aftermarket provides a hardened outer intermediate sprag race as an improve for the TH350 transmissions. It takes extra abuse than the inventory outer race, however can nonetheless fail in a high-torque utility whether it is used with the inventory curler clutch meeting. This occurs just because the load isn’t distributed evenly to the outer race as it’s with the a lot stronger 36-element aftermarket sprag meeting. The (aftermarket) hardened race on this picture survived 71 high-10-second dragstrip runs behind a high-torque 455-ci engine earlier than it exploded.

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