Thread: Six wheel drive conversion?

This is an interesting discussion on the subject:

http://www.outerlimits4x4.com/PHP_Modules/...pic.php't=23691

Plenty of 'lazy axle' conversions but not many true 'six wheel' drives.

Always made me wonder how the rear axle spun the same way as the others even though the 'drive' is taken from the rear of the crown wheel which you would think make the back shaft spin in reverse to the others.

Double gear set somewhere ?

Originally posted by Hellspawn
Plenty of 'lazy axle' conversions but not many true 'six wheel' drives.

Always made me wonder how the rear axle spun the same way as the others even though the 'drive' is taken from the rear of the crown wheel which you would think make the back shaft spin in reverse to the others.

Double gear set somewhere ?

Flip the diff centre?

Thinking about it some more I guess you could do that for a tandem rear setup...... turn the front one over (get reverse cut the crown and pinion to increase strength), leave the back diff as normal then drive from between diffs using a transfer style gearbox on it's side with the tailshaft coming in over the top. That might work, articulation would be the next thing unless you lock them together as a bogie, or use very short live shafts to have some independence of movement per axle. The Pingauzer seems to have fanscination of the month, similar system to it I guess is the "go".


My thought originally related to a setup (like trucks) where on tandems, drive goes through the first diff and into the second with a live driveshaft between them so they can articulate properly. Just couldn't work out how they get the back shaft to spin the right way, must have a second gear set. :?

Think I need to do a websearch. :wink:

Originally posted by Hellspawn
Plenty of 'lazy axle' conversions but not many true 'six wheel' drives.

Always made me wonder how the rear axle spun the same way as the others even though the 'drive' is taken from the rear of the crown wheel which you would think make the back shaft spin in reverse to the others.

Double gear set somewhere ?

the australian built 6x6 rear axles were both driven from the transfer case, seperate propshafts

serg

Long way 'round init ? Seperate prop shafts....

Yeh it sounds like it, but i've got a funny feeling the old Chev 6X6s we used to use on Fraser had seperate tailshafts.
I like your original idea of driving from the rear of the leading diff but if both diffs were properly seperat wouldn't the short tailshaft hinder the articulation toward the end of travel? Just wondering as this sort of thing has made me wonder before, be curious to hear what your websearch shows
Bill

This is the technical manual for the roadranger setup. Starting on page 93 it shows independent axles driven from a "power divider" and two seperate props.

http://www.roadranger.com/csee/MungoBlobs/...sm0046-0101.pdf

Not the design I am thinking of, taken 2 hrs to find that one, proverbial needle in a haystack.


As for prop shafts depends how much travel is expected ? Three feet, me and imperial measure [img]style_emoticons/<#EMO_DIR#>/laugh.gif[/img] , if there's 900mm between the drive yokes then in theory allowing for clearances 1600mm of total shaft length. Springs would limit upward movement, however articulation for say crossing a ridge would need more extension down so set up the ride height to allow for that. Never be a hardcore rock crawler setup, however, 1600mm of potential diff seperation wouldn't be a bad start.

I figure the design would work, use the salisbury for strength and something to bolt to (easier to remove the hat than butcher the rover diff), double gearset to reverse the drive of the crown wheel so it spun the right way. Another design goes begging. :roll: