Ok well me and my uncle are gonna install my 3.42s i got from a friend this weekend, i got a extra 10 bolt that has 3.23s so i will use the 3 series carrier out of it. But my question is will it affect much of anything changing gears from 2.73 to 3.42???? by affect anything i mean will my tune get messed up or will it just basically mess up my speedo alittle???