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About the TH400 Transmission

 

TH400 Transmission Pan TH400 Transmission

The Turbo 400 transmission was a 3 speed automatic transmission developed by General Motors. This was one of General Motors editions of the Hydramatic transmission series.

This transmission is known more commonly by the name TH400, although it did receive another name change in the late 80s, adopting the name 3L80.

This is a durable and very well-known transmission, as it was in production for many years and applied to a wide variety of vehicles, not only General Motors. The TH400 was initially placed in Buick and Cadillac cars and later added to Chevrolet, Oldsmobile and Pontiac cars.

This transmission eventually made its way into many of the truck applications for General Motors. The transmission was not exclusive to General Motors, as many luxury brands such as Jaguar, Ferrari, Rolls-Royce and many others made use of this transmission.

The TH400 was first introduced beginning in 1964, as it began to replace the Super Turbine 300 transmission, which was a 2 speed automatic. The Turbo 400 was placed in many cars across GM as well as other car manufacturers during its long production life.

Overall the transmission remained in production an impressive 27 years before it was eventually replaced by a 4 speed electronically controlled transmission, the 4L80E, in 1991.

Common Problems

The TH400 was very popular, particularly known for its strength. One of the attributes that is credited with providing this strength is the cast iron center support.

Although the overall sentiment is that this is a very strong and durable transmission, some of the most common problems seen are clutch wear and hydraulic fluid leaks.

Turbo 400 Performance Specs

The Turbo 400 is rated conservatively at peak torque of 450 lb-ft. That being said, this transmission is commonly used in hot rods and paired with engines making far more torque, although these transmission also must commonly updated with some aftermarket parts.

Many of the other specifications for this transmission are defined by the name 3L80 that was given late in this transmissions life cycle:

  • The 3 represents that this is a 3 speed transmission, and in the case of the Turbo 400, a 3 speed automatic transmission.
  • The L represents the orientation of the transmission, with L specifically calling out a longitudinally position transmission.
  • The 80 indicates that this transmission was rated for GVW up to 8000 lbs.

This 3 speed transmission has its gear ratios defined as 2.48 for 1st, 1.48 for 2nd, and 1.0 for 3rd gear.

Construction and Size

The Turbo 400 is primarily constructed of cast aluminum, with the bell housing being integrated into the transmission and also made of cast aluminum. Some areas are cast iron, such as the center support for the transmission.

The TH400 is 24.37 long and comes in at a weight of 135 pounds dry. This transmission does vary in the amount of fluid required, based on certain specifications such as which torque converter is used. That being said, a common fill volume is between 11-12 quarts for a stock transmission.

The TH400, or Turbo 400, transmission was a 3 speed automatic that was first produced in 1964. This transmission became well-known for its strength and was very popular, based on its life and the number of applications in which it was installed.

It was not only used in General Motors applications, but was also used for many luxury cars. Overall this transmission was in production for 27 years, and to this day is commonly used for many aftermarket applications.


TH400 Transmission Dimensions


  • TH400 Overall Length: 28 1/4
  • TH400 Face To Mount Length: 26 3/4


  • TH400 Gear Ratios


  • 1st Gear: 2.4
  • 2nd Gear: 1.4
  • 3rd Gear: 1.0

TH400 Maintenance and Upgrades



TH400 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


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


 

 

Vehicles with TH400 Transmission

Acura ~ Alfa Romeo ~ Allison ~ American Motors Corp (AMC) ~ Audi ~ BMW ~ Buick ~ Cadillac ~ Checker ~ Chevrolet ~ Chrysler ~ Daihatsu ~ Delorean ~ Dodge ~ Eagle ~ Ferrari ~ Fiat ~ Ford ~ Fuso ~ Geo ~ GMC ~ Honda ~ Hyundai ~ Infinity ~ International ~ International Harvester (IHC) ~ Isuzu ~ Jaguar ~ Jeep ~ Kia ~ Laforza ~ Lancia ~ Land Rover ~ Lexus ~ Lincoln ~ Lotus ~ Maserati ~ Mazda ~ Mercedes-Benz ~ Mercury ~ Merkur ~ MGB ~ Mitsubishi ~ Nissan ~ Oldsmobile ~ Opel ~ Peugeot ~ Plymouth ~ Pontiac ~ Porsche ~ Range Rover ~ Reliant ~ Renault ~ Rolls Royce ~ Rover ~ Saab ~ Saturn ~ Sterling ~ Studebaker ~ Subaru ~ Suzuki ~ Toyota ~ Triumph ~ Volkswagon ~ Volvo ~ Zimmer

 

 

TH-400 Transmission Transbrake STAGE 3 TH400 1200HP

$2,900.00  
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NEW FTI PERFORMANCE LEVEL 4 TH400 TURBO 400 TRANSMISSION TH400-4 GM CHEVY 900 HP

$2,199.00  
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NEW FTI PERFORMANCE LEVEL 3 TH400 TURBO 400 TRANSMISSION TH400-3R GM CHEVY 800HP

$1,959.00  
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Turbo 400 TH400 Transmission Conversion Kit Stage3 High Stall CONVERTER w/Fluid

$2,599.00  
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AMC Turbo 400 Transmission T400 TH400 short tail TurboHydramatic tranny rebuilt

$1,350.00  
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TH400 Transmission Specialties Trans Brake JW Performance Ultra Bell Housing

$2,999.99  
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FTI Performance TH400-4UB Transmission Ultra Bell Trans-Brake Reverse 900HP

$3,099.99  
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AMC Turbo 400 Transmission T400 TH400 short tail TurboHydramatic tranny hi-perf

$1,995.00  
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TH-400 High Performance Street transmission with torque converter

$1,995.00  
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Turbo 400 TH400 Transmission Conversion Kit Stage 3 High Stall CONVERTER

$2,999.00  
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Chevrolet TH400 HD Turbo 400 4X4 Automatic Transmission w/Torque Converter CORE

$500.00  
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Chevy Turbo 400 Transmission 4x4 Stage 1 (TH400)

$2,569.42  
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1964 Cadillac Series 62 TH400 Transmission - No Adapter Plate PRnDL

$623.99  
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TCI Transmission 211300 Auto Trans Street Fighter TH400 Buick Olds Pon 6479 No

$1,791.94  
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1975 Th400 Transmission Long Tail Housing Rebuilt

$900.00  
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B&M 21041 TH-400 Transmission Racing Overhaul Kit

$367.61  
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1964 RIVIERA CORE AUTOMATIC TRANSMISSION TH400 8-425 643998

$150.00  
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Automatic Transmission 4WD TH400 Fits 88-90 CHEVROLET 1500 PICKUP 4142884

$798.99  
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Automatic Transmission 4WD TH400 8 Cylinder Fits 81-90 GMC 2500 PICKUP 3602130

$425.00  
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TCI211300 - TCI 211300 Street Fighter TH400 (Turbo 400) Transmission - Large

$1,963.95  
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Automatic Transmission RWD TH400 Fits 81-90 FleetWood

$350.00  
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Automatic Transmission 4WD TH400 8 Cylinder Fits 81-90 GMC 2500 PICKUP 329667

$1,207.49  
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Automatic Transmission 4WD TH400 8 Cylinder Fits 81-90 GMC 2500 PICKUP 2077679

$887.35  
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Automatic Transmission 2WD TH400 8-305 Fits 88-90 CHEVROLET 1500 PICKUP 1764536

$840.82  
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3-Speed Auto TH400 Turbo-Hydramatic Transmission UE73054 Bentley Turbo R 85-1991

$890.99  
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Automatic Transmission RWD TH400 Fits 80-84 86-90 FLEETWOOD 1229337

$1,029.90  
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Automatic Transmission TH400 With Bolt-on Yoke Fits 90 CHEVROLET 30 VAN 506671

$601.98  
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B&M 20229 Transkit Automatic Transmission Shift Improver Kit for TH400/TH375/M40

$349.99  
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Automatic Transmission 2WD TH400 Diesel Fits 78-79 CHEVROLET 10 PICKUP 360059

$278.00  
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Automatic Transmission TH400 Fits 73-89 CHEVROLET 30 VAN 132423

$300.00  
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FTI Performance TH400 Level 4 Transmissions Transbrake TH400-4UB 900HP

$3,550.00  
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Automatic Transmission TH400 Fits 66-75 CHEVELLE 1251602

$918.27  
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FTI Performance TH400-4UBC - FTI Performance TH400 Level 4 Transmissions 900HP

$3,399.00  
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AUTOMATIC TRANSMISSION 2WD TH400 6-262 4.3L FITS 85-89 CHEVROLET 10 VAN 556377

$882.69  
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RARE BIG BLOCK CHEVELLE SS TH400 TRANMISSION (REFUBISHED / READY TO INSTALL)

$2,495.00  
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Performance Automatic PA40102 TH400 Transmission

$2,782.98  
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FREESHIP! Automatic Transmission 4WD TH400 8 Cyl for 1981-1990 GMC 2500

$746.00  
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1967 -1974 CHEVROLET TH400 RESTORATION TRANSMISSION (DATE CODED W/ CORRECT TAG)

$3,900.00  
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FTI Performance TH400-5UB - FTI Performance TH400 Level 5 Transmissions 2,000HP

$5,499.00  
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Performance Automatic PA40104 Street Smart TH400 Transmission Package Includes:

$4,030.98  
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JW Performance 30221-RD Competition TH400 Transmission HP Rating: 1000hp Pan: St

$2,085.98  
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Automatic Transmission 4WD TH400 8 Cylinder Fits 81-90 GMC 2500 PICKUP 3538121-1

$450.00  
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1966 1967 Cadillac 66 67 Fleetwood Deville TH400 TURBO HYDRAMATIC TRANSMISSION

$149.94  
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Transmission Assy.TH400 Turbo 400 CHEVROLET VAN 86 No converter

$475.00  
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JW Performance 30210-500 Street Lethal TH400 Transmission

$1,868.98  
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Transmission Assy. CHEVROLET PICKUP 85 TH400 Turbo 400 4wd DAMAGED

$480.00  
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Core V8-425 TH400 3-Speed Automatic Transmission for 65-76 Oldsmobile 98

$299.95  
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Lokar PN 1213134 Tight Locking Flexible Transmission Dipstick Fits XJS 91-92

$147.40  
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TH350 FTI JW Performance Bell Manual Valve Body Transmission Shield Transbrake

$2,799.99  
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Automatic Transmission 4WD TH400 8 Cylinder Fits 81-90 GMC 2500 PICKUP 3492244-1

$450.00  
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FTI Performance TH400-5UB 2000HP Rated Turbo 400 Lvl 5 Transmission Trans-Brake

$5,799.99  
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Automatic Transmission 2WD TH400 Diesel Fits 78-79 CHEVROLET 10 PICKUP 2687

$499.99  
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Core for Rebuild 3 Speed TH400 Transmission for 65-76 Pontiac Grand Pri

$368.95  
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Speedmaster PCE432.1048 Street/Strip Transmission TH400 Aluminum SFI 30.1 4.1

$5,070.98  
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FTI Performance TH400-4.5UB Transmission Ultra Bell Trans-Brake Reverse UB

$3,999.99  
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Automatic Transmission 2WD TH400 Fits 88-90 CHEVROLET 1500 PICKUP 17548084

$575.79  
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Core TH400 Code PB Automatic Transmission for 1977 Pontiac Grand Pri

$329.95  
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Automatic Transmission 88 89 90 Chevy 1500 Pickup 4X4 Th400 6 Cyl 3191029

$836.00  
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CHEVROLET TH400 RESTORATION TRANSMISSION

$1,100.00  
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GM TH400 Stage 3 Turbo 400 Transmission Kit w/up to 4500 Stall Converter

$2,999.00  
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Turbo 400 TH400 Transmission Street/Strip Stage 2 Performance Transmission

$3,195.00  
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Turbo 400 Chevy Transmission Street/Strip Stage 1 4" Tail

$2,895.00  
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Turbo 400 Chevy Transmission Stock Replacement Long Tail 13""

$2,795.00  
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Turbo 400 Chevy Transmission Stock Replacement Short Tail 4"

$2,487.34  
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