Understanding the BOP TH350 Transmission: A Cross-Reference Guide for Compatible Cars

The BOP TH350 transmission, also known as the Turbo Hydra-Matic 350, is a legendary automatic transmission that graced countless classic American muscle cars. Its robust design and wide-ranging compatibility make it a popular choice for enthusiasts and restoration projects alike.

What is the BOP TH350 Transmission?

The TH350 is a three-speed automatic transmission developed by General Motors. The name “BOP” refers to the “Buick, Oldsmobile, Pontiac” engine family, which these transmissions were originally designed for. The TH350 quickly gained popularity across various GM models, becoming a mainstay in muscle cars and everyday vehicles alike.

Recognizing a TH350⁚ Key Identifying Features

To verify if you have a TH350 transmission, look for these distinctive characteristics⁚

  • Case⁚ The TH350 has a cast-iron case with a unique “dog leg” shape on the passenger side.
  • Tag⁚ A metal tag on the transmission case will typically display “TH350” or “TH350C” (for cars with a column shifter).
  • Fluid Pan⁚ The TH350 fluid pan is usually stamped with “TH350” or “TH350C.”
  • Input Shaft⁚ The TH350 input shaft has a 26-spline count;

Compatible Cars⁚ A Cross-Reference Guide

The BOP TH350 transmission is compatible with a wide range of GM vehicles, including⁚

Chevrolet

  • Chevelle
  • Camaro
  • Corvette
  • Nova
  • Impala
  • Bel Air
  • Monte Carlo
  • El Camino

Pontiac

  • Firebird
  • GTO
  • Le Mans
  • Grand Prix
  • Tempest

Buick

  • Skyhawk
  • Regal
  • GS
  • Century
  • LeSabre

Oldsmobile

  • Cutlass
  • 4-4-2
  • Toronado
  • Starfire

Important Considerations⁚

While the TH350 is known for its durability, it’s crucial to remember that compatibility goes beyond just the model year. Engine size, rear axle ratio, and other factors can influence the suitability of a TH350 for a specific vehicle. Consulting a reputable transmission specialist or a comprehensive restoration guide is recommended to ensure proper compatibility and avoid potential issues.

Conclusion

The BOP TH350 transmission remains a legend in the world of classic cars. Its wide compatibility and robust design make it a popular choice for enthusiasts seeking a reliable and proven automatic transmission. By understanding the key identifying features and compatible applications, you can confidently determine if a TH350 is right for your classic GM vehicle.

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