Here are the gear ratios and tooth counts. Would be best to pull the cover and change the fluid anyway, you dont know how long its been in there.Then you could just see what gears are in there.
2.56:1 41,16
2.73:1 41,15
3.07:1 43,14
3.08:1 40,13
3.08:1 37,12
3.31:1 43,13
3.36:1 37,11
3.42:1 41,12
3.55:1 39,11
3.73:1 41,11
4.10:1 41,10
4.11:1 37,9