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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

 

 

Automatic Transmission TH400 Fits 66-75 CHEVELLE 328140

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Core Automatic Transmission TH400 Fits 1970 LEMANS 890397

$200.00  

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NEW PERFORMANCE Stage 3 TH400 TURBO 400 TRANSMISSION TH400-3R GM CHEVY 800HP

$2,000.00  

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NEW FTI PERFORMANCE LEVEL 3 TH400 TURBO 400 TRANSMISSION GM CHEVY REVERSE SHIFT

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Automatic Transmission RWD TH400 Fits 80-84 86-90 FLEETWOOD 859433

$350.00  

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Automatic Transmission TH400 Fits 73-89 CHEVROLET 30 VAN 140009

$400.00  

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TH-400 High Performance Street transmission with torque converter

$2,195.00  

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Turbo 400/TH400 Transmission

$200.00  

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Automatic Transmission 4WD TH400 Fits 77-79 CHEVROLET 20 PICKUP 879875

$300.00  

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AMC Turbo 400 Transmission T400 TH400 short tail TurboHydramatic tranny rebuilt

$400.00  
End Date: Friday Feb-10-2023 11:14:13 EST
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69-79 Buick Oldsmobile Pontiac TH400 Transmission - Unable to Test

$499.99  

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

$1,249.99  

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Core Automatic Transmission TH400 8-401 Electra Fits 65-66 BUICK 883160

$250.00  

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AMC Turbo 400 Transmission T400 TH400 short tail TurboHydramatic tranny rebuilt

$1,350.00  

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Automatic Transmission TH400 Fits 73-89 CHEVROLET 30 VAN 121118

$500.00  

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

$4,900.00  

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Core Automatic Transmission TH400 8-425 Fits 1977 DEVILLE 869665

$175.00  

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Automatic Transmission 2WD TH400 Fits 88-90 CHEVROLET 1500 PICKUP 1854986

$850.00  

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1973-1989 CHEVY VAN 30 SERIES Automatic Transmission 64854 Original Miles TH400

$765.00  

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FTI Transmissions & Converters TH400-4.5UB TH400 Performance Racing Transmission

$4,133.99  

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Core Automatic Transmission TH400 Long Tail 8-455 Fits 1976 LESABRE 869130

$200.00  

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Automatic Transmission 2WD TH400 8-350 Fits 88-90 CHEVROLET 1500 PICKUP 903889

$549.99  

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Automatic Transmission TH400 Fits 85-89 CHEVROLET 10 VAN 384301

$695.00  

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CORE Transmission RWD TH400 Fits 80-84 86-90 FLEETWOOD 850863

$350.00  

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Automatic Transmission TH400 Fits 73-89 CHEVROLET 30 VAN 133747

$650.00  

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

$299.95  

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Automatic Transmission TH400 Fits 73-89 CHEVROLET 30 VAN 3182384

$699.00  

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1964 RIVIERA CORE AUTOMATIC TRANSMISSION TH400 8-425 643998

$150.00  

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Automatic Transmission 2WD TH400 8-350 Fits 88-90 CHEVROLET 1500 PICKUP 3932081

$705.00  

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

$300.00  

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Automatic Transmission 2WD TH400 Fits 88-90 CHEVROLET 1500 PICKUP 116050

$769.99  

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90 CHEVY VAN 10 AUTOMATIC TRANSMISSION TH400 354043

$600.00  

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Automatic Transmission TH400 Fits 85-89 CHEVROLET 10 VAN 3881372

$795.00  

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AMC TH400 Automatic Transmission w/ Quadratrac BW1339 Transfer Case FSJ Wagoneer

$1,500.00  

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Automatic Transmission 2WD TH400 8-350 Fits 88-90 CHEVROLET 1500 PICKUP 3896826

$795.00  

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1964 WILDCAT CORE AUTOMATIC TRANSMISSION TH400 8-401 892118

$250.00  

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

$768.00  

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1964 Cadillac Series 62 TH400 Transmission - No Adapter Plate PRnDL

$623.99  

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ATI 401935 TH400 SuperCase Tailhousing

$198.00  

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

$368.95  

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

$3,550.00  

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Turbo 400 TH400 Transmission Street/Strip Stage 2 Performance Transmission

$3,195.00  

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TCI Automotive TH400 Street Fighter Transmission Automatic / Manual Valve Body

$2,463.43  

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Core TH400 Code PB Automatic Transmission for 1977 Pontiac Grand Pri

$329.95  

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TCI 211300 TH400 StreetFighter w/ 4 in Shaft

$1,967.45  

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1990 Chevy 1500 4.3 4X4 TH400 AUTOMATIC TRANSMISSION ASSEMBLY 122k Miles

$275.00  

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Camaro Nova Chevelle Corvette El Camino Turbo 400 TH400 Transmission

$695.00  

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1979 Jeep AMC Turbo 400 Automatic Transmission case

$699.00  

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TCI 212000 Drag Race TH400 4" Tailshaft Large Yoke Reverse Shift Pattern

$2,306.78  

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Tci 211300 Th400 Tranmission Street Fighter Bop W/4In Tailhs

$2,362.32  

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Core Automatic Transmission TH400 Fits 1970 LEMANS 890397

$200.00  

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Automatic Transmission RWD TH400 Fits 80-84 86-90 FLEETWOOD 859433

$350.00  

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

$850.00  

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

$1,963.95  

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3-Speed TH400 Automatic Transmission Gearbox OEM UE73054SXR Bentley Turbo R

$1,199.99  

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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 4WD TH400 Fits 77-79 CHEVROLET 20 PICKUP 879875

$300.00  

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89 CHEVY 7.4 USED TH400 BOLT ON YOKE 2WD Transmission

$999.00  

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Core Automatic Transmission TH400 8-401 Electra Fits 65-66 BUICK 883160

$250.00  

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Core Automatic Transmission TH400 8-425 Fits 1977 DEVILLE 869665

$175.00  

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1967 Cutlass 442 Turbo 400 Transmission OG Code w/ Torque Converter,Flywheel,etc

$1,499.99  

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SS 396 TH400 transmission 69 Chevelle CE69

$1,500.00  

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Core Automatic Transmission TH400 Long Tail 8-455 Fits 1976 LESABRE 869130

$200.00  

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CORE Transmission RWD TH400 Fits 80-84 86-90 FLEETWOOD 850863

$350.00  

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FTI Performance TH400-4.5UB Transmission Ultra Bell Trans-Brake Reverse UB

$3,999.99  

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AMC Turbo 400 Transmission T400 TH400 short tail TurboHydramatic tranny hi-perf

$1,995.00  

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1964 RIVIERA CORE AUTOMATIC TRANSMISSION TH400 8-425 643998

$150.00  

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FTI Performance TH400-4UB Transmission Ultra Bell Trans-Brake Reverse 900HP

$3,299.99  

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1970s Jeep AMC Turbo 400 Automatic Transmission 4x4 V8? dana transfer case? four

$500.00  

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88-90 CHEVROLET/ GMC 1500 2500 PICKUP AUTOMATIC TRANSMISION 4x2 TH400 6 CYLINDER

$1,199.96  

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1977 CADILLAC SEDAN DEVILLE AUTOMATIC TRANSMISSION ASSEMBLY 101237 MILES TH400

$350.00  

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90 CHEVY VAN 10 AUTOMATIC TRANSMISSION TH400 354043

$600.00  

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1964 WILDCAT CORE AUTOMATIC TRANSMISSION TH400 8-401 892118

$250.00  

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

$7,495.00  

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1965-79 POB FULL SIZE CAR TH400 AUTOMATIC TRANSMISSION CORE PONTIAC 1970 PA

$165.00  

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TCI211005 TCI 211005 Super StreetFighter TH400 Automatic Transmission - Forward

$2,496.95  

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

$368.95  

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Core TH400 Code PB Automatic Transmission for 1977 Pontiac Grand Pri

$329.95  

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1970 Camaro Z28 NOS Turbo400 Sun Gear Shaft TH400 Hi Perf original GM

$150.00  

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1970 Camaro Z28 NOS Forward & Direct steel plates TH400 Hi Perf original GM

$100.00  

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1970 Camaro Z28 NOS Turbo400 rear shaft ring gear TH400 Hi Perf original GM

$150.00  

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90 GMC VAN 2500 SERIES Transmission Tranny Trans 5.7 Auto Assy Tested!!!

$599.95  

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86 87 88 89 90 91 92 93 BUICK REGAL Transmission Tranny Trans 3.8 Auto Tested!!!

$599.95  

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TransGo Shift Kit 400-3 TH400

$119.99  

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TransGo Shift Kit Performance Buick Chevy Oldsmobile Pontiac TH400 1965-95 Kit

$99.99  

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Lokar TD3350400FM TH350 TH400 Firewall Mount Braided SS Transmission Dipstick

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TransGo Shift Kit 400-3 TH400

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Th400 Kickdown Switch Ki

$101.80  

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LOKAR Trans Dipstick Th400 TD-3400TM

$148.90  

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Xtd 3400Tm Black Dipstick Fits/For Gm Th400 Trans Trans Mount

$175.04  

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Xkd 2400Ht Black Kickdown Kit Fits/For Gm Th400

$161.95  

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Automatic Transmission TH400 Fits 85-89 CHEVROLET 10 VAN 866768

$1,200.00  

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Automatic Transmission TH400 Fits 73-89 CHEVROLET 30 VAN 1298864

$1,150.00  

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Automatic Transmission 4WD TH400 8 Cylinder Fits 81-90 GMC 2500 PICKUP 721906

$950.00  

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TH400 Tranmission Street fighter BOP w/4in Tailhs

$2,213.95  

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TCI Th400 Street Fightr Tran 211000

$2,399.95  

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Trans Super Streetfightr GM TH400 w/4in Tail Hous

$2,746.95  

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NEW FTI PERFORMANCE LEVEL 3 TH400 TURBO 400 TRANSMISSION GM CHEVY FORWARD SHIFT

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Chevy Turbo 400 Transmission 4x4 Stage 1 (TH400)

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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 Short Tail 4"

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Turbo 400 Chevy Transmission Stock Replacement Long Tail 13""

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TCI Automotive Trans Super Streetfightr GM TH400 w/4in Tail Hous

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