Gearstar TH400 Level 2 Transmission 550HP 500 lb-ft Stall 2600–3600
SKU: GSTGSTH4002WDL2
Chevrolet TH400 3-speed automatic transmission.
Performance Specifications
TH400 Level 2
Rated up to 550 HP at the crankshaft
Rated up to 500 ft-lbs of torque at the crankshaft
Torque Converter & Stall
Custom-built & custom-stalled 12" or 13" high-performance torque converter
Stall Speed: 1,600 – 2,200 RPM
Core Build & Internal Upgrades
Master overhaul kit with new steels
Raybestos high-energy frictions
Transgo shift kit
High-capacity direct clutch drum
Heavy-duty forward clutch hub
Bands, Bearings & Internal Components
New front band
New Borg-Warner low-reverse band
New Torrington bearing kit
Bushing kit with flanged no walk-out case bushing
Thrust washer kit
New low-reverse spring and roller
Fluid System & Pump Components
High-volume, high-flow pump assembly
New hardened pump gears
High-flow filter
External Components & Accessories
New aluminum transmission pan with a drain plug
New transmission mount
New external transmission cooler
New torque converter dust cover
Controls & Sensors
New kickdown solenoid
Adjustable modulator
New speedometer drive gear
New speedometer-driven gear
Hardware & Installation
Bellhousing hardware
Torque converter hardware
Case Options
Chevrolet and BOPC case options are available
| Gear Ratios |
1st |
2nd |
3rd |
| TH400 |
2.480 |
1.480 |
1.000 |
| Dimensions |
| Measurements are taken from the mounting surface where the trans meets the engine block to the tip of the tailshaft |
| Total Length: 28″ with 4″ Tail Housing 2WD Only |
| Total Length: 31″ with 9″ Tail Housing |
| Distance to trans mount center: 27″ |
