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HomeTH350C Transmission Specifications and Cross Reference

TH350C Transmission Cross Reference and Interchange Chart


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Popular Transmissions: Chrysler 727 |  Chrysler 904 |  Ford AOD |  Ford C4 |  Ford C6 |  Ford FMX |  GM 4L60 |  GM 4L80E |  GM Powerglide |  GM Turbo 200 |  GM Turbo 350 |  GM Turbo 400 |  GM Turbo 700


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TH350C Transmission Details


BUICKTH350C Transmission Pan BUICKTH350C Transmission

TH350C Transmission Adapters


Trans-Dapt Transmission Adapter: 1962-Up Chevrolet V8 to 1966-Up B.O.P. (Buick, Olds, Pontiac) or ST300, TH350, TH400, 700R4

Transmission Adapter; 62-Up Chevrolet V8 to 66-Up B.O.P. or ST300, TH350, TH400, 700R4

Automatic Transmission Adapter for adapting a 1962-up Chevrolet V8 engine to a 1966-up Buick, Olds, Pontiac, Cadillac ST300, TH350, TH400 or 700R4 Transmission

Trans-Dapt Part# 0060

  • Instruction Sheet
  • See Pricing on Amazon

Trans-Dapt Transmission Adapter: 1966-Up B.O.P. (Buick, Olds, Pontiac) or Cadillac V8 to 1962-Up Chevrolet TH350, TH400, 700R4

Transmission Adapter; 62-Up Chevrolet V8 to 66-Up B.O.P. or ST300, TH350, TH400, 700R4

Automatic Transmission Adapter for adapting a 1966 or later, Buick, Olds, Pontiac or Cadillac V8 to a 1962-up Chevrolet TH350, TH400 or 700R4 Transmission

Trans-Dapt Part# 0061

  • Instruction Sheet
  • See Pricing on Amazon

The Turbo 350 transmission was introduced beginning in 1969.

This transmission was a 3 speed automatic transmission developed jointly by Chevrolet and Buick. Although they were both under the General Motors umbrella, at the time they acted as completely separate entities, whereas now the developers at General Motors powertrain work only for GM, not Chevrolet or Buick.

This transmission replaced the GM Powerglide automatic transmission, which was a 2 speed automatic transmission that was in production for 23 years.

The Turbo 350, known by the name TH350, was used in nearly all GM rear wheel drive car and truck applications during its tenure. To name a few, this transmission was used in the Caprice, Chevelle, Corvette, Blazer, and Nova.

The TH350 was introduced in 1969 as a replacement to the Powerglide 2 speed automatic transmission. While the phase-in began in 1969, it was not complete until the 1973 when the Powerglide fully phased out.


This transmission was in production for about 15 years, being fully replaced by the 700R4 in 1984. In addition, a TH350-C added the lockup torque converter capability and was introduced in 1979.

Common Problems

While the TH350 is no longer in production, the transmission is still used for many classic car builds. The TH350 was popular for a variety of reasons. The simple fact that this transmission had an extra gear compared to its predecessor is an advantage from the start.

This transmission is also known for being strong and versatile, in addition to being quite compact.

One of the weaknesses noted about this transmission was wobble of the direct clutch drum.

Turbo 350 Performance Specs

The maximum torque that this transmission could handle varied depending on the application to which it was being applied. The transmission would be modified so that the transmissions behind the stronger engines were able to handle the additional torque.

The most torque from an engine that this transmission was applied to was 410 lb-ft. This is an automatic transmission that is longitudinally mounted, making it applicable for rear-wheel drive cars.


This transmission is a 3 speed, and no overdrive gear was available. The gear ratios used for this transmission were 2.52 for 1st gear, 1.52 for 2nd gear, and 1.0 for 3rd gear.

Construction and Size

The Turbo 350 transmission was a single piece transmission with the bell housing integrated into the transmission body. The transmission casing is made of cast aluminum.

The TH350 was also known for its quite short length, with an overall length of 21.75”. That also converts into a lighter transmission that carries a weight of 120 pounds.

The TH350 takes about 4 quarts in the pan, and then requires additional based on the torque converter being used. When combined with a 9.5” converter, the overall requirement is around 10 quarts.

The Turbo 350 transmission, commonly known as the TH350, was a 3 speed automatic transmission that began phasing out the GM Powerglide in 1969. The TH350 then lasted 15 years before eventually being replaced by the 700R4.

The TH350 offered a substantial improvement to its predecessor, with the additional gear being an obvious improvement from the beginning. During its time of usage, the TH350 was used in virtually all rear wheel drive vehicles from General Motors, including the Corvette, Chevelle, and Nova. This transmission was very popular due to its strength and versatility, as is still used in many vintage cars to this day.

TH350C Parts and Kits on Amazon...

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TH350C Filter Kits

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TH350C Cooler and Lines

TH350C Torque Converters

TH350C Parts

Is your transmission leaking? Try Transmission Sealer or Stop Leak...

Vehicles with TH350C Transmission:

BUICK Transmission1976-83 BUICK ELECTRA
TH350  TH350C  
BUICK Transmission1976-83 BUICK LESABRE
TH350  TH350C  
BUICK Transmission1980-83 BUICK PARK AVENUE
TH350C ~ > View Details
> Show All Matching Vehicles
BUICK Transmission1982-83 BUICK REGAL
TH350C ~ > View Details
> Show All Matching Vehicles
CADILLAC Transmission1982 CADILLAC FLEETWOOD
TH350C ~ > View Details
> Show All Matching Vehicles
CHEVROLET Transmission1969-82 CHEVROLET BLAZER (FULL SIZE) 3 SPEED RWD
TH350  TH350C  
CHEVROLET Transmission1968-81 CHEVROLET CAMARO
TH350  TH350C  
CHEVROLET Transmission1980-84 CHEVROLET CAPRICE
TH350C ~ > View Details
> Show All Matching Vehicles
CHEVROLET Transmission1968-81 CHEVROLET CHEVELLE
TH350  TH350C  
CHEVROLET Transmission1976-81 CHEVROLET CORVETTE
TH350  TH350C  
CHEVROLET Transmission1982-84 CHEVROLET MALIBU
TH350C ~ > View Details
> Show All Matching Vehicles
CHEVROLET Transmission1982-84 CHEVROLET MONTE CARLO
TH350C ~ > View Details
> Show All Matching Vehicles
CHEVROLET Transmission1969-86 CHEVROLET TRUCK (C/K SERIES)
TH350  TH350C  
CHEVROLET Transmission1969-86 CHEVROLET VAN (FULL SIZE)
TH350  TH350C  
GMC Transmission1980-84 GMC CABALLERO
TH350C ~ > View Details
> Show All Matching Vehicles
GMC Transmission1980-82 GMC JIMMY
TH350C ~ > View Details
> Show All Matching Vehicles
GMC Transmission1969-86 GMC TRUCK (C/K SERIES)
TH350  TH350C  
GMC Transmission1980-86 GMC VAN
TH350C ~ > View Details
> Show All Matching Vehicles

See Also:

  • Transmission Ratios
  • Transmission Dimensions
  • Transmission Identification
  • Differential Identification
  • How To Install a Transmission Cooler
  • How To Install a Transmission Temp Gauge

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