lengthening a chassis or 6wd

[Tiny]

I am very close to chopping the GQ wagon I have into an extra cab ute. Before the naysayers come out with the why would you do it crap, I like uts and I am a big bastard and the GQ cab is to small to be comfortable for me. My old GU was ok, but still not as much room as I would like.

The purpose of the vehicle will be primarily as a DD and tow rig and I would like plenty of tray area so extending the wheelbase is on the cards.

I have also thought about 6wd set up to increase the GVM also with a turntable set up in the back of my head, but primarily for the extra weight for towing and extra braking

I am assuming that for a chassis extension in a ute set up would be to cut and graft a section in before the arch, that seems pretty stright forward, jigs etc to keep it true would be needed, but any tech would be good, couldnt find much on this on the web

In terms of 6wd, how do people go about this? is the best way to graft another rear chassis section to the back of the existing section? also how does one go about drive shafts? in a bogie drive truck set up there is very little articulation and the front diff has an output on ther rear to run a shaft to the rear diff. I am assuming there is not much around in a light vehicle to do this so its a matter of running two shafts.

I am sure with some research I could something to bolt to the transfer to allow to outputs and run one shaft to the front diff and one apprelell to the output to a bearing and then drop down to the rear diff or a set up similar anyway, I imagine this is something like what others have done and the gear to do it is out there

basically any links and tech would be great, will help me decide if I want to tackle this or not

thanks

Tiny

[hj 45]

Not a GQ, but check this out: http://forum.ih8mud.com/70-series-tech/ ... r-6x6.html

[43som]

for 6wd setups, the army utes are 6x6. check them out, see how their setup.

[Tiny]

Not a GQ, but check this out: http://forum.ih8mud.com/70-series-tech/ ... r-6x6.html

cool link thanks it means I was on the right track about the drive set up, but the chassis is castly different. It seems they have a completely custon chassis and suspension set up, I was hoping to try and keep the coil set up and run a second 5 link coil set up behind it and run pollyair bag in the coils for extra stiffness

time to have another look at the arse end of the GQ me thinks

[bogged]

http://www.4wdworld.com.au/6x6-Australia.html

[Tiny]

http://www.4wdworld.com.au/6x6-Australia.html

they look sweet as

[80's_delirious]

http://www.4wdworld.com.au/6x6-Australia.html

where is the rear drive shaft??

I was looking at similar idea a couple of years back, found this link before, but have seen no pics of it articulated that much with rear drive shaft in place.


search for the Australian Army Perenti, based on Landrover 110, but with modified chassis and body.
I'm pretty sure they run two transfer cases back to back so you get two drive shafts running to the rear. The first drive shaft is as in 4x4, runs straight to the front/rear diff, the second drive shaft runs over the front/rear diff, has a centre bearing/pillow block, then CV joints down to the rear/rear diff. this gives you 2x6, 4x6, or 6x6, both transfers can be locked and all diffs locked

spend some time on google, I found some good international sites with good pics of rear diff set ups, the biggest difficulty is setting up the bogie drive and keeping decent articulation. the turning circle and overall length limit them offroad, but I reckon 6x6 would be an awsesome tourer.

[bogged]

cant remember the dude in OBC that had a 6x6 75 series from memory... was a POS, it couldnt turn around (not a complete turn) and he timed out.

[bludnut]

i have also seen a 6x6 that was set up with a transfer case mounted to the front of the front rear diff. driveshaft from the gearbox/transfer to the diff/transfer, one drive to the front rear diff then the other drive OVER the front rear diff to the rear rear diff..

[76patrol]

dude there was a thread on a finish 4x4 site i found a link to accidentally a few years ago. (link was on a patrol site)( truck was mq patrol if i remember correctally) it was really good and the way he did it it still articulated really well. ill have a look but dont know if ill have any luck.

[76patrol]

http://www.patrol4x4.com/forum/showthread.php?t=112 ill add more as i find them.http://videos.streetfire.net/video/Stan ... 102999.htm

[B.D.R]

My boss looked into get a Cruser made into a 6wd, 35k drive in drive out .

Not the cheapest thing to do .

He bought a new Izuzu light truck, worked out cheaper

[76patrol]

http://forums.offipalsta.com/showthread ... x6&page=12 this is the link i was lookin for

[ferrit]

we have a few 6x6 cruisers running around work, these are a few shots i took of one when it was in our workshop a few years back.


http://ferrit.ozonejunkie.com/gallery/v ... =x7d700a5b

Hopefully that works!

Biggest issue with it was because the mid and rear diff were locked together by the transfer case to split the drive (didnt have a centre diff in that transfer) it had a MASSIVE turning circle- in excess of 20 meters

[locktup4x4]

I was fallowing this one, but he has since gone to another project.

http://forum.darwin4x4.net/viewtopic.ph ... &sk=t&sd=a

Jason

[Squeak]

You can use one of these to get twin outputs to the rear.
http://www.ottindustries.com/divorced_toyota_tcase.html
You run the Hilux T-case fliped to give two outputs from the rear. If you fit a twin stick to the Hilux T-case then you have the option of 2wd (middle diff or Hilux case in neutral front diff), 4wd (middle and rear diff or middle and front diff) or 6wd (all three diffs). Normal driving in 2WD would be on the "middle" diff and would allow you to reduce the drag on the "rear" diff by not driving it (simply trailing it in a sense)

You would need to run a flipped (diff pumpkin offset on passenger side instead of drivers side) 80 series "rear" diff housing to give a good driveline angle to the rear diff. Hilux two peice shafts would allow you to run the "rear" shaft over the "middle" diff with out many interference issues.
You might however run into an issue with the panhards and rear tail shaft but with the rear tail shaft coming down the passenger side it should be able to clear easily in a five link setup.

High travel "middle and rear" CV tailshaft for the middle diff would mean that you wouldn't have to move the middle diff backwards to fit the extra box in. Dobbin engineering makes them but I'm sure other peolpe do to.
http://www.dobbinengineering.com/products.htm
This would help keep the wheel base shorter, meaning you would only have to extend the rear of the chassis to attach the "rear" diff in.



On a side note:-
Jason he has moved on to a new project but the dream is still alive

[shortyq]

i think you are refering to a lazy axle!
raising the agregate weight to 2 tonne payload!
you would need a bogey drive for 6wd if thats what you are insisting?

[hulsty]

Had this come into work, was surprised to see its a 6x6 so I took a few snaps!

GVM is 5700kg permanent 6x4

[Tiny]

i think you are refering to a lazy axle!
raising the agregate weight to 2 tonne payload!
you would need a bogey drive for 6wd if thats what you are insisting?

I was thinking that if it was worth the effort going for a second axles that it may as well be live as it would make the vehicle more suitable should I decide to take it offroad from time to time. It is a question of usability and cost and while I think it wold be cool to have it looks like in general they strugggle with tuning circle and cost a lot more than I would have expected to set up so maybe just a little longer wheel base to get the longer tray is a better option.


Thanks for the links and pics guys, there is some interesting tech and reading.....if only I had more cash

anyone have any tech on extending the chassis?

[ledgend80]

was watching the new inventors and seen one where these guys had made a chassis extension that clips on and clips off with and extra axle they talking about 9000 for it. try the new inventors web site and see if you can find it. that way it can still be used as a 2 axle car or when you need it a 3 axle car.

note this was done from a straight ute chassis not from a chopped down car but if you can find it might give you some ideas