Chevrolet Performance has adapted the production-based 8L90-E eight speed automatic transmission for use with the LT1 and LT4 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.
Two version are available: a slipe-yoke design to be used with the LT1 engine (24284055) and a slip-yoke design to be used with the LT4 engine (24284063).
Use with LT4 crate engines (wet sump or dry sump)
Must be used with compatible engine controller
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