Gearstar Transmission TH400 4x4 Level 3 Can Handle 800HP 750lb/ft tq Stall Range 2600-4000
SKU: GSTGSTH4004X4L3
Chevrolet TH400 3-speed automatic transmission. Buick, Oldsmobile, Pontiac, & Cadilliac bellhousings available.
Transmission Overview
TH400 4x4 Level 3
Rated up to 800 HP
Rated up to 700 ft-lbs
Torque Converter & Stall
Custom-built billet Yank Performance converter (12" or 13")
Custom stalled
Stall speed: 1,600–2,200 RPM
Internal Upgrades & Performance Components
High-capacity direct 8-clutch drum
34-element intermediate sprag with hardened race
Heavy-duty forward clutch hub
Raybestos Stage 1 racing frictions
New Borg-Warner low-reverse band with heavy-duty lugs
New front band
New low-reverse spring and roller
TransGo re-programming kit with shift command
Rebuild & Wear Components
Master overhaul kit with new steels
Bushing kit with flanged no walk-out case bushing
Thrust washer kit
New Torrington bearing kit
Pump & Fluid System
High-volume, high-flow pump assembly
New pump gears
High-flow filter
New external transmission cooler
Electrical & Controls
New kickdown solenoid
Adjustable modulator
Gears & Speed Components
New speedometer drive gear
New speedometer-driven gear
External Components & Hardware
New aluminum transmission pan with a drain plug
New torque converter dust cover
Bellhousing hardware
Torque converter hardware
Compatibility 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″ |
