i have a 3.55 rear. will go out later and try to get better readings.

 

w/ the 45rfe and 3.55 rear end gears you should be going about 69mph at 2000 rpms as long as you have the stock 31inch tires on the truck

 

took some pics


and


one more



the tire size is P265/70R16


and also realized that according to torque the app that connects via obd2 bluetooth the rpms on dash are reading around 80rpm shy of what the app says the computer sees. the speeds match, and on the highway radar speed readers match as well.

 

looks to me like you are at about the right place, i wouldnt worry about it

 

I have the 3.96 gears with the same motor and tranny in a 2001, I was running a little under the 2500 mark on the tach at 75/76 mph last night - probably 2300/2400 range. I agree with "roll on"....