3.06 1st gear,
1.63 2nd gear,
1.00 3rd gear,
.070 4th gear
.055 Over drive
That's what I found for stock 4l60e
Then to find the final drive ratio just multiply each gear by what ever your rear diff is.... '
4.10 3.73
1st 12.55 11.41
2nd 6.68 6.07
3rd 4.1 3.73
4th 2.87 2.61
OD 2.25 2.05