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6L80/6L90 General Specifications

6L80/6L90 General Specifications

What are the basic differences between GM's 6L80 and 6L90 transmissions?



RPO Code

Transmission Drive Rear Wheel Rear Wheel
1st Gear Ratio 4.03 4.03
2nd Gear Ratio 2.36 2.36
3rd Gear Ratio 1.53 1.53
4th Gear Ratio 1.15 1.15
5th Gear Ratio .85 .85
6th Gear Ratio .67 67
Reverse Gear Ratio 3.06 3.06
Torque Converter Size 258mm or 300mm 300mm
Pressure Taps Line Pressure Line Pressure
Fluid Type Dextron VI Dextron VI
Case Material Aluminum Aluminum
GVW 8600 LBS 15000 LBS
GCVW 14000 LBS 21000 LBS
Net Weight 207-229 LBS 240 LBS


6L80 & 6L90 Transmission Parts & Rebuild Kits



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