Chevrolet Performance SuperMatic 8L90-E Transmissions

Chevrolet 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) Show Less