I have 2.79 gears in my 37 and I also have a t-5 behind the 235,on flat ground I can put it in 5th but as soon as I hit a hill it has to go into 4th. I did notice a drop in gas mileage due to lugging it too much and will be putting in 3.25 to 3.50 gears this winter,with the trans I have it takes off great from a stop but 5th is useless. Jeff