GM 6L90-E Heavy-Duty Six-Speed Automatic Transmission

The 6L90-E is the larger-capacity member of GM's rear-drive 6L automatic group. A replacement is appropriate for selected truck, van and performance applications only after its case, output and electronic code are matched.

Specs
- GM transmission RPO: MYD (6L90 family)
- Speeds: Six forward plus reverse
- Gear ratios: 1st 4.027; 2nd 2.364; 3rd 1.532; 4th 1.152
- Overdrive gears: 5th 0.852; 6th 0.667
- Reverse ratio: 3.064
- Layout: Longitudinal automatic, rear-drive based
- Control type: Electronic pressure and shift management with torque converter

Confirm 2WD/4WD output style, bellhousing and engine control compatibility. Do not assume a 6L80-E can replace a 6L90-E.