4x4 all wheel steering ideas/plan and AG diesel swap
#1
12-04-2013, 07:52 PM
4x4 all wheel steering ideas/plan and AG diesel swap
To start,
I have been thinking about a build for a long time now being that of a agricultural diesel from a combine/tractor swapped into a ford factory hi-boy. I have seen one with an IH 5 cyl from 1967 from a combine, and a 1968 f250 with a 6.354 perkins swap (SO awesome) both roughly 19 - 23 mpg all of which got me thinking....
There is nothing better than turning tractor parts into goodies for trucks. stacks, hand throttles, ect. So what better to compliment a 6cyl perkins or such in a pick up? hmm, how about all wheel steering. I had a day off work with nothing much to do so i thought i'd figure out some ideas. It started off with simply flipping a front axle (dana 60 in this case) back wards and setting up hydraulic steering (pretty simple). There i encountered my first problem, I don't want gears made to turn at fast speeds running in an opposite direction. Next step, flip the rear axle upsidedown so the gears run in correct rotation for speed. This however leaves a very large problem, which you already can guess if you are picturing the drive train in your head. this problem i'll get back to in a second...
Another aspect of adding an AG diesel into a truck is gearing and road speed. unless i want to spend a ton of fuel at 50 mph i had better work something out. First though, 2 speed rear axle with an extra overdrive. too heavy, too much money and effort converting to front axle hubs, too much fab and opportunities to breakdown. I figured out the fabrication of the process (minus the actual measurements), it could be done but i though there may be a MUCH easier way. 2nd thought, gear splitter, or brownie box. well good luck finding a brownie box, so thats out. I'd really prefer not spending 3000 just for a little extra overdrive, as well, i just dont like the mechanism.
Between these two problems i was a little stuck... adding an extra o/d and lining up my drive line with 2 front axle dana 60 diffs (off center). Then I had a fantastic idea that may potentially solve both my problems. I could have the transmission (5 speed, still deciding on model) and np 205 tcase, running to a second np205 tcase! i know this isnt an original idea as far as using a tcase as a secondary overdrive, but my idea is simply to take a divorved np205, turned backwards, will line up to the 'rear' front differential housing perfectly. the output spline of the 1st tcase would run into the output spline of the 2nd tcase where the output spline would drive the actual rear drive shaft. this would allow for the np205s 1:1.98 underdrive to turn into about a .52 overdrive. the only issue would be an upside down second tcase. other than that, everything would line up pretty much perfectly. granted, there would be a couple drive shafts to be fabed up and a mess of motor, tranny, tcase mounts to be made and perhaps a cross member. But i think it could come together.
Any thoughts from the crowd? i was thinking 4.10s for the dana front and rears. an nv4500 5speed and 2 np205s.
As for the powerplant, my idea engine would be a turbo deutz of some form. depends on space and weight of course. but any AG diesel would run great at this sort of gearing set up as it could actually push the rig at low rpms.
these were todays thoughts anyway
I have been thinking about a build for a long time now being that of a agricultural diesel from a combine/tractor swapped into a ford factory hi-boy. I have seen one with an IH 5 cyl from 1967 from a combine, and a 1968 f250 with a 6.354 perkins swap (SO awesome) both roughly 19 - 23 mpg all of which got me thinking....
There is nothing better than turning tractor parts into goodies for trucks. stacks, hand throttles, ect. So what better to compliment a 6cyl perkins or such in a pick up? hmm, how about all wheel steering. I had a day off work with nothing much to do so i thought i'd figure out some ideas. It started off with simply flipping a front axle (dana 60 in this case) back wards and setting up hydraulic steering (pretty simple). There i encountered my first problem, I don't want gears made to turn at fast speeds running in an opposite direction. Next step, flip the rear axle upsidedown so the gears run in correct rotation for speed. This however leaves a very large problem, which you already can guess if you are picturing the drive train in your head. this problem i'll get back to in a second...
Another aspect of adding an AG diesel into a truck is gearing and road speed. unless i want to spend a ton of fuel at 50 mph i had better work something out. First though, 2 speed rear axle with an extra overdrive. too heavy, too much money and effort converting to front axle hubs, too much fab and opportunities to breakdown. I figured out the fabrication of the process (minus the actual measurements), it could be done but i though there may be a MUCH easier way. 2nd thought, gear splitter, or brownie box. well good luck finding a brownie box, so thats out. I'd really prefer not spending 3000 just for a little extra overdrive, as well, i just dont like the mechanism.
Between these two problems i was a little stuck... adding an extra o/d and lining up my drive line with 2 front axle dana 60 diffs (off center). Then I had a fantastic idea that may potentially solve both my problems. I could have the transmission (5 speed, still deciding on model) and np 205 tcase, running to a second np205 tcase! i know this isnt an original idea as far as using a tcase as a secondary overdrive, but my idea is simply to take a divorved np205, turned backwards, will line up to the 'rear' front differential housing perfectly. the output spline of the 1st tcase would run into the output spline of the 2nd tcase where the output spline would drive the actual rear drive shaft. this would allow for the np205s 1:1.98 underdrive to turn into about a .52 overdrive. the only issue would be an upside down second tcase. other than that, everything would line up pretty much perfectly. granted, there would be a couple drive shafts to be fabed up and a mess of motor, tranny, tcase mounts to be made and perhaps a cross member. But i think it could come together.
Any thoughts from the crowd? i was thinking 4.10s for the dana front and rears. an nv4500 5speed and 2 np205s.
As for the powerplant, my idea engine would be a turbo deutz of some form. depends on space and weight of course. but any AG diesel would run great at this sort of gearing set up as it could actually push the rig at low rpms.
these were todays thoughts anyway
