GM Performance Automatic Transmission, SuperMatic 8L90-E, 8 Gears, Forward Shift Pattern, Automatic Valve Body, 4.56 First Gear, Chevy, LT1, Kit (PART #GMP-19419798)

GM Performance SuperMatic 8L90-E transmissions have been adapted for use with the LT4 crate engines. Each of these 8-speed automatic transmissions feature a numerically high 4.56 first-gear ratio to offer strong take-off performance, while their wide 7.0:1 overall ratio helps enhance cruising efficiency.

Additional highlights of the SuperMatic 8L90-E transmissions:

  • Four gear sets for greater efficiency
  • Five clutches--two brake clutches and three rotating clutches
  • World-class upshift speeds
  • Friction-reducing features include synthetic fluid
  • Gear ratios: 1st: 4.56, 2nd: 2.97, 3rd: 2.08, 4th: 1.69, 5th: 1.27, 6th: 1.00, 7th: 0.85, 8th: 0.65, reverse: 3.82
  • Controller and harness included
  • Torque converter included (engine-specific)

SPECIFICATIONS

Brand GM Performance
Manufacturer's Part Number 19419798
Part Type Automatic Transmissions
Product Line GM Performance SuperMatic 8L90-E Transmissions
Number of Gears 8
Bellhousing Bolt Pattern Manufacturer Chevy
Transmission Shift Pattern Forward
Valve Body Style Automatic
Torque Converter Included Yes
Flexplate Included No
Transmission Controller Included Yes
Wiring Harness Included Yes
Transmission Cooler Included No
Advertised Flash Stall Rating Stock
Trans-Brake Included No
Lockup Compatible Yes
Transmission Pan Style Stock
Transmission Pan Material Aluminum
Transmission Pan Finish Natural
Yoke Style Slip-on
Input Shaft Material Hardened steel
First Gear Ratio (Automatic Transmissions) 4.56
Transmission Case Style OEM
Transmission Case Material Aluminum
Transmission Case Finish Natural
Transmission Shield Built In No
Flexplate Shield Built In No
Fluid Fill Location Case
Transmission Fluid Included No
Dipstick Included No
Remanufactured No
Quantity Sold as a kit.
Notes Includes torque converter, controller and harness. Must be used with compatible engine controller and LT1 crate engine.