Jonathan Hanson said:I expect the low range ratio will still be more than adequately slow for our needs, which includes little rock crawling. If not, we can install a set of the Marks low range gears from Australia.
BlueHZT60 said:I don't think you'll need the Marks gears. I'm on 35's, 4.11 and Marks 1.08 ratio gears. I'm 11% over on the speedometer with this combination. The Marks Gears -TC will more than likely be coming out of my rig because they are noisy. They are awsome for crawling but noisy on the highway.
Also, for reference my 60 is heavy (about 7,000 lbs loaded/fueled) with a 1hz-t'd & Maggiolina on top. I get 17mpg trying not to get tickets. I'm sure it would go up if I slowed a bit and lightened up.
Bob
cruiseroutfit said:There are major differences in the Marks Gears over the years, while many of their early sets did produce some gear noise and highway whine, their newer versions are noticeably quieter. The idler (secondary) setup now uses tapered roller bearings on a specially designed idler shaft rather than a standard idler shaft with roller bearings.
Jonathan Hanson said:Update on fuel economy: We just refilled the tank, after about 300 miles of mixed in-town, two-lane highway, and dirt-road-to-our-house driving. This one worked out to 25.8 mpg.