GM 8L45 transmission

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ManufacturerGeneral Motors
Body and chassis
Class8-speed longitudinal automatic transmission

The 8L45 is an eight-speed automatic transmission built by General Motors debuting in the 2016 Cadillac CT6. It is designed for use in longitudinal applications attached to the front-located engine with a standard bell housing. It is a hydraulic (hydramatic) design sharing much with the 8L90 transmission.[1] Estimated weight savings over the heavier duty 8L90 is 33 pounds. Gear ratios used enable a wide 7.0 ratio spread.

1 2 3 4 5 6 7 8 R
4.62 3.04 2.07 1.66 1.26 1.00 0.85 0.66 3.93


Model Years Make and Model Final Drive Ratio
2016–present Cadillac ATS
2016–present Cadillac CTS
2016–present Cadillac CT6
2016–present Chevrolet Camaro
2017–present Chevrolet Colorado
GMC Canyon


  1. ^ "Cadillac Introduces New 8-Speed Automatic on CT6". Cadillac Media USA. Cadillac Media USA. Retrieved 20 March 2015.