I have a 2003 Tahoe. I'm not sure what the gear ratio is. I swapped the differential once so RPO codes are no use. The original code is GT4. The donor car is long gone. It's on 32" tires. I want to use bluecat to tune the transmission. What could the gear ratio be?
I raised the rear end and rotated the tire to try to identify the ratio. For two tire rotations the drive shaft turned about 2 1/2 or 2 3/4 times. I think this means the ratio is 2.xx something ish.
The transmission is 4l60e.