Well...I can go 67 mph @ 2400 rpm in 5th! My pinion bearings failed in my 4:10 diff. and the shop had what I think is a 3.6x diff to put in till they can rebuild mine. But that let me drive home. I can do 40 in 1st, 72 in 2nd 105 in 3rd 150 in 4th (est.) 202 @ 7200rpm in 5th (est.) 0 - 60 is real fast!!! Only 1 shift!