Engine/Transmission (1994 - 1998) Mileage woes!

[CumminsPower98]

BWillson: I see you have a '97 so yes you can just change the speedo driven gear. In '98 they went electronic and started taking the speed from the ABS sensor in the rear differential rather then the transfer case.

 

[Blakers]

Originally posted by CumminsPower98

Blakers: How on earth do you get 70 mph out of 1760 rpms? I run the same tire size as you and I get 71 or 72 at 2k. I also have 3. 54 gears and a speedometer correction box.



Mark

I don't know. I know I run about 1800 at 73 mph. 1500 at 55 mph. Have you timed your correction box with mile markers along the highway?



Good luck,



Blake