Diablosport Forums

02' f250 U7170. I plugged in the formula you gave me to adjust the trans shift point. Rev/mile = tire size. So my formula came out to be Nov=(582*3.73)/60 which =36.18. I plugged this into the base nov setting on the modify section of the programmer and the shifting was pretty bad, is this right? I put it back to the previous setting which is better, but still not where I want it. When I drive normal it shifts okay, but when I get in the gas just a little or when I give it gas to go up a hill it shifts into higher gears to fast. I am running 325/65/18 tires with a 3.73 gear and an automatic trans. I just want to program the tire difference in to make it shift better. Thanks.

post up the tire specs on here and let me give it a go

325/65/18

since every tire tends to be different, revs per mile might change. Try the manufactures website or tirerack.com. What brand of tires are they make/model? I got 599 for revs per mile for a similar sized tire but no guarantee that that is correct.

they are 325/65/18 toyo open country a/t's

i got 35.882