canadaler
12-10-2004, 03:21 PM
***EDIT*** You know, I think I should have gone through other posts first, think I've already found my answer to this from some other discussions. Probably is not worth changing and some have actually changed from 3:55 to 3:92 and prefer it, with little change in hwy mileage and improvement around town....left the original post here anyways if you've got time to kill.
I went to an auction yard today and checked out a few vehicles that I'm interested in. One is a 1991 Dodge 350 "maxi" passenger van. I couldn't tell from the sticker under the hood, or looking at the engine, but I gotta assume it's a 360 in it. The rear axle ratio (from tag in the door) says it's a 3:90/9.25" unit and there is a push-button for O/D on the dash. (Hood sticker also calls up a 4 speed auto.)
Per my first post, I'm looking for something to rack up highway miles with and am afraid that this axle ratio may be a little high for that. How difficult (or possible) would it be to find and retro-fit this rear end with a lower ratio set of gears?
...or am I "out to lunch" on this one and shouldn't even bother thinking about changing them to get better milage?
I went to an auction yard today and checked out a few vehicles that I'm interested in. One is a 1991 Dodge 350 "maxi" passenger van. I couldn't tell from the sticker under the hood, or looking at the engine, but I gotta assume it's a 360 in it. The rear axle ratio (from tag in the door) says it's a 3:90/9.25" unit and there is a push-button for O/D on the dash. (Hood sticker also calls up a 4 speed auto.)
Per my first post, I'm looking for something to rack up highway miles with and am afraid that this axle ratio may be a little high for that. How difficult (or possible) would it be to find and retro-fit this rear end with a lower ratio set of gears?
...or am I "out to lunch" on this one and shouldn't even bother thinking about changing them to get better milage?