Can I reprogram the computer in a 1995 Oldsmobile Aurora to accept another differential ratio?

One transaxle is 3.42:1. The other ratio is 3.71:1. They are both factory options.|||You will have to have a dealer tech program the vin of another car with matching ratio or purchase a reman pcm with programming already installed that is if the car is obd-2 which means it does not have a replacable prom. also the ratio difference will matter because 4T80-E trans have input and output speed sensors .the computer will think the trans is slipping,because of ratio change.done been there before.|||It should not make a difference the compiutyer should comp for the new transaxle. there is a possibility though that you may have to change the pins, or the loom.