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Chevrolet Performance has adapted the production-based 8L90-E eight speed automatic transmission for use with the LT1, LT4 and LT5 crate engines. A numerically high 4.56 first gear ratio offers strong take-off performance while a wide 7.0:1 overall ratio helps enhance cruising efficiency.
Four gearsets for greater efficiency
Five clutches - two brake clutches and three rotating clutches
World-class upshift speeds
Friction-reducing features include synthetic fluid