Ok, got another question for you 6.5 gurus. Like I stated before we have a 95 3500HD,6.5, auto, 15K gvw, 2wd,regular cab, dually. I am wondering if anyone knows the rear ratio that would have been in these trucks. Also what trans are they, 4L80E? It tachs @ 2500 at 60mph, so needless to say the fuel economy sucks, 8-9 mpg. What could we do to get better economy? The boss wants to change the rear ratio but I have told him it will put too much stress on the trans and converter. I would love to get some better economy so the boss will let me drive it more often. I love driving it, rides good and is pretty cool looking. Any suggestions would be great. Thanks guys.
02 3500 LB7 DRW LS crew cab 4x4.
Mods:Predator, CAI, Straight through Pypes 3.5 muffler, Alcoas
92 GMC Typhoon
13.25 @ 99 mph on stock 113K motor
Mods: 30 over 4.3 ltr V-6, 2.02/1.60 L-35's,20G,
92 GMC Syclone, Ultimate 10n1 chip