Rubber overdrive? HMMWV tires and wheels: HMMWV Tire And Wheel | eBay - https://www.ebay.com/itm/294609243329?hash=item4498144cc1:g:i0QAAOSw9lVhrOlT&amdata=enc%3AAQAHAAAAoJQvXk%2BqNUDSpShGHCw%2Bjv7cg5a0lOrvaL697eixQwo4HvPDzyCsZegVPLjzSVat4ik4CJJ8vTf4T6b5Tis%2B3yLVP3PswUCygue%2FFclvPLuMxARRldAck%2B3TkX69QhptIW4%2Fvzyff%2FvAVA9kT6LhZ2LMCz%2Bfdt82Ay6YEypCBT8FUOi5APvMzVea0s0xVnmNRBu69EpJCgKiYJFFqlalUKY%3D%7Ctkp%3ABk9SR8rllfH7YAAwesome, can't wait to see how your 55 comes out as well. I've thought about using the Isuzu transmission with some sort of TC attached to it, but the 5th gear ratio on mine is at least 1:1, then I'd have to regear the rear and front end just to not be maxxed out at 55 mph in 5th gear. At least the h55 is 0.845:1 if I could get my hand on a NV4500 for relatively cheap then I'd go for that due to the higher OD, and there are adapter kits for the Isuzu engines to those transmissions, but as I'm on an extreme budget for all of this I don't think I can add that to the mix as well.
If you could get any lead/info on adapting an h55 to the 4BD's that would be greatly appreciated. Or if there is a pretty cheap option to adding a transfer case to the Isuzu transmission then I could have money left to regear it with. Thanks!
With HMMWV rims/tires you can have true beadlocks and 37" radial MT's at bargain prices. 37's Aired down to 10PSI with beadlocks and you're cruising almost anywhere offroad slowly with ease. That much rubber under the troopy they last super long as well.