Does anyone know the ACTUAL gear ratios for 1st/2nd/3rd/4th on the 4T60-E? I keep coming up with
1st = 2.92:1
2nd = 1.56:1
3rd = 1.0:1
4th = .7:1

However, something isn't balancing out....

Aren't there differently geared 4t60e'* or is it the differential that makes them different?

Those are the correct drive ratios. But they are the reduction gearing from the internal gears. They do not include the ratio provided by the drive chain gears or the differential gears.

There are three chain ratios (35/35, 37/33, and 33/37) to pick from, then a couple of finals to pick from.

I think I see where my issues are coming up from. I'll have to make a phone call and see what I can find out. Thanks guys!