FSJ-dually build ? or buy ?

[AMC-J/20]

Ok I have talked about DRW FSJs a lot on and off.

You have sent me to the TX factory dually registery site on which I found some good but limited info on the factory and dealer cobble job duallys.
The TX FSJ site seems to be abandoned and not really active so more links to that place won't do much good.

Best I can tell:
The factory duallys are a bit weak ? It said the front axles where D44s ? Under a 1 ton ?
The dealership built trucks were J20s with adaptors allowing the SRW rims to be dueled, then adding fender extensions ?

Would a factory dually D44/D70 be the way to go ?

Or

Should I build a dually by swapping axles under a 63-88 J-truck ?
Say D70/D70 or D70/D80 axle combos for example ?


Mike

[J20 project]

Factory jeep trucks were a bit weird. I appears that other than the bas$%%% wheelbase which fits nothing in particular, the axles were not up to the task. Well, the rears possibly but w/ the old Budd pattern split rims, still not a good option. Newer trucks I have no knowledge of. The white multiuse dually in the registry belongs to my Dad and he had a heck of a time making a bed work.

All that being said, a modernish truck,,76 up due to a strengthened frame w/ modern axles under it would be great. You would have the necessary wheelbase to build a decent bed along w/ say a good 14bolt,60 combo from a gm.. or perhaps a 70/60 combo from a dodge. Gearing is the last issue w/ modern axles giving you something reasonable. My Dads has some deep gears in it.
At any rate, go for it. find a 1ton chev and get after it. Or a dodge, cummins option
J20-

[joe]

Curious here you planning on hauling a huge camper or trailer or you just like the look of training wheels on a truck?

[fulsizjeep]

Well, how about this. Would you be interested in this?

http://jubileejeeps.org/ourfsjs/sampson/arrival/images/IMG_3475_JPG.jpg
1972 J4800 Camper Special - Original owner put after market dually adapters on it and had the fenders widened. 360/T400/D20 The engine is wore out but runs. I have a RF fender that is much better than the one on it. $2000 firm. Optional 401 to go with it for $600 more. PM me if interested.

[Lindel]

www.txfsja.org (http://www.txfsja.org)

[Long&Low]

Well, how about this. Would you be interested in this?

http://jubileejeeps.org/ourfsjs/sampson/arrival/images/IMG_3475_JPG.jpg
1972 J4800 Camper Special - Original owner put after market dually adapters on it and had the fenders widened. 360/T400/D20 The engine is wore out but runs. I have a RF fender that is much better than the one on it. $2000 firm. Optional 401 to go with it for $600 more. PM me if interested.



You sir, are a Great Googely Moogley Temptress..........:thumbsup:

[AMC-J/20]

Yes I wanna be able to tow heavy ! And yes I like the look and the way duallys drive if ya must know.

What would it take to swap the SRW rims for DRW rims ?


Mike

[COLOFIREMAN]

Funny you should post this thread. I'm building something just like what your asking about. ....

http://i226.photobucket.com/albums/dd218/COLOJEEPGUY2K/IMAGE_315.jpg

http://i226.photobucket.com/albums/dd218/COLOJEEPGUY2K/IMAGE_314.jpg

The front is going to be a Dana 70 with dually adapters. The load carrying rating for this axle is very high. That's a size 10.5 in the picture to give you a idea of the axle tubes.

http://i226.photobucket.com/albums/dd218/COLOJEEPGUY2K/Dana70axle.jpg

What I found though is the inner duals get very close to the frame, even if the springs are mounted under the frame. A little too close even with an RV Dana 70HD.......

http://i226.photobucket.com/albums/dd218/COLOJEEPGUY2K/IMAGE_312.jpg

http://i226.photobucket.com/albums/dd218/COLOJEEPGUY2K/IMAGE_311.jpg

I still think I will go forward with the dually build but I will still keep the singles for snow plowing, they work A LOT better in the snow.

Here's a mock up picture when it had the flatbed on it.....
http://i226.photobucket.com/albums/dd218/COLOJEEPGUY2K/duallyJ-truck.jpg

Also, here's a LINK (http://www.ifsja.org/forums/vb/showthread.php?t=83955) of another member's build. Hope the pictures get the creative juices flow'n!!!:thumbsup:

[AMC-J/20]

Yup that's the idea, that is the look I was going for !

I had planed on going with 19.5 wheels n tires, prolly a 225/70R19.5s will be my ideal tire size.
Same tires used on the RAM4500/5500s & F450/550s . . .

My 62 GMC came factory on 19.5s I switched my 77 F350 over from 16.5s To 19.5s along with many other duallys I've had in the past, I love the handling a long tread life plus the safety of running load range F, G and H under D/E rated trucks.

EDIT:
Some thing to this effect !
http://i305.photobucket.com/albums/nn232/HURSTSSAMX69/Jeep%20J-truck%20project/AMCJeepJ-55002.jpg

I was shooting for a flat bedded truck but it could easily be done with a pickup truck as well too i'm sure . . .


Mike

[AMC-J/20]

So 360/401-automatic ? Prolly only has 3.73s or 4.10s sounds Doggy ?

I love AMC V8s but the lower compression ones seemed to be a bit doggy . . .

AMC-390/NV4500 was the combo I wanted to build, but then I got to thinking can the 4500 and 390 even be mated up ?


Mike

[AMC-J/20]

Funny you should post this thread. I'm building something just like what your asking about. ....

http://i226.photobucket.com/albums/dd218/COLOJEEPGUY2K/IMAGE_315.jpg

http://i226.photobucket.com/albums/dd218/COLOJEEPGUY2K/IMAGE_314.jpg

The front is going to be a Dana 70 with dually adapters. The load carrying rating for this axle is very high. That's a size 10.5 in the picture to give you a idea of the axle tubes.

http://i226.photobucket.com/albums/dd218/COLOJEEPGUY2K/Dana70axle.jpg

What I found though is the inner duals get very close to the frame, even if the springs are mounted under the frame. A little too close even with an RV Dana 70HD.......

http://i226.photobucket.com/albums/dd218/COLOJEEPGUY2K/IMAGE_312.jpg

http://i226.photobucket.com/albums/dd218/COLOJEEPGUY2K/IMAGE_311.jpg

I still think I will go forward with the dually build but I will still keep the singles for snow plowing, they work A LOT better in the snow.

Here's a mock up picture when it had the flatbed on it.....
http://i226.photobucket.com/albums/dd218/COLOJEEPGUY2K/duallyJ-truck.jpg

Also, here's a LINK (http://www.ifsja.org/forums/vb/showthread.php?t=83955) of another member's build. Hope the pictures get the creative juices flow'n!!!:thumbsup:

A Cab & chassie dually or RV dually have narrower axles then a dually pickup truck ;) Just some FYI :thumbsup: if that help's you any . . .

Mike

[AMC-J/20]

Now should i find a factory dually and swap out the dually axles ?

or

Build a J/20 pickup into a dually pickup truck ?


Niw taking a J/20 pick up and turning it into a dually flat bed prolly won't work as well for me because you have a good bit of over hang :banghead:

What i like about my 62' GMC is the truck was a tipper so when i put on my flat bed the rear axle was set backward with short leaves and large tires, It'll out turn any full sized pickup truck out there :thumbsup: i like this :cool:

My F-150 i used to have and my My K2500 would have keep stopping and back up pull for ward back n pull forward to maneuver in the wood's as where my 62' GMC DRW truck would walk right through 1 shot no backing up :D


So if i bough a factory Jeep dually 60" C/A tipper and swapped out the 6 lugged D44/D70 for a 8 lugged D60/D70 or D70/D70 Combo would i have the same effect as my 62' GMC ?

EDIT:

here i'll show ya what i'm saying;

62' GMC:
http://i305.photobucket.com/albums/nn232/HURSTSSAMX69/Miltiary%20trucks/1962%20GMC%204500/62GMC4.jpg


95' K2500;
http://i305.photobucket.com/albums/nn232/HURSTSSAMX69/1995%20GMC%20K2500/Winterwheels.jpg

Notice the rear axle placement difference between the Pickup v.s. C & C ?

Mike

[Elliott]

It's pretty unlikely you are going to be able to find a factory dually to begin with. Much simpler to just buy a later truck and swap the axles under it. You are going to have to revise the rear spring hangers so when you go to do that you can locate the axle anywhere you want. You will end up with a Jtruck that has ~6.5-7" of lift so if that isn't what you want on a dually then you will want to consider going spring under on both axles... and that gets more complex on the D60 but at least one member here has done it.

[Mikel]

In my opinion, putting huge axles under a FSJ is a bit of a waste. I had a Dana 70 and 60 under my J300 and I knew that the frame and the suspension were not in the same level as the axles. J-trucks don´t have the frame or wheelbase to compare with a modern F350 in load capacity or towing abilities, regardless of axles. In the end, it´s all about balance. You want all components in a vehicle to work well together.

I ended up replacing the D70 with a D60, as well as a lighter spring pack and I´m much happier. I´m keeping the front D60, mostly because I love having such oversized brakes, which will greatly help towing.

My $0.02

[AMC-J/20]

They ain't all that up to par with the GVWR of back then either really, My 77' F350 has a GVWR of 12,500lb's . . . The 62' GMC's GVWR is 14,000lb's . . .

Weight isn't that big of a deal the J/20-J-300's GVWR is 8,600LB's so is my 95' K2500 which is perfect as thats the truck the FSJ-dually would be replacing . . .

I wanted the D60/70 or D70/D70 combo for the ability to Run 8 lug dually Rim's so i could replace the 16's with 19.5's . . .

The axle flip would increase the truck's height a great deal :eek:

7.50-16 & 235/85R16 = 32.2"-31.8"

225/70R19.5 = 32.2" - 32.6"

245/70R19.5 = 33.3"-33.5"

33.5" - 31.8" = 1.7" that is going to leave a lot of wheel well room :eek: ain't it :confused:


Mike

[AMC-J/20]

So for what i want your saying run a D60/D70 combo with the duel wheel rim axle hub's and run the SUA set up ?

Ideally i only wanted to go with the 225/70R19.5's which are only .5" taller then the 16's :cool:

Now as for axle placement issue:

Either get a J/20 and make it a dually pickup truck IE: add the fender flares ?

or

Remove the bed and slide the rear axle backward and drop on a flat bed ?

Mike

[men in black]

Here's a friend of mine 55 GMC dually tow truck. He bought it from somebody
in Colorado. Well the cab is 55, box is 57.

Those rims are powdercoated to look rusty and the air cleaner is off a old
Cadillac.

He wanted to make a MATER for his 5 year old son.

http://i112.photobucket.com/albums/n192/pixelhound/DSC03446Small.jpg

[AMC-J/20]

:eek: Now that is a short wheel based dually :thumbsup: . . . those sure look like 19.5's on there as well :D . . .

Mike

[bigun]

You sir, are a Great Googely Moogley Temptress..........:thumbsup: Temptress would be Krista not Flint. Flint after all the hassle to get it now you are selling?

[AMC-J/20]

I'm just trying to picture what the wheel to tire gap would be i could use these tires i guess . . .

245/70R19.5 Oliver Super Traction's:

http://i305.photobucket.com/albums/nn232/HURSTSSAMX69/Tires/th_OliverSuperTraction1.jpg (http://s305.photobucket.com/albums/nn232/HURSTSSAMX69/Tires/?action=view&current=OliverSuperTraction1.jpg)

http://i305.photobucket.com/albums/nn232/HURSTSSAMX69/Tires/th_OliverSuperTraction2.jpg (http://s305.photobucket.com/albums/nn232/HURSTSSAMX69/Tires/?action=view&current=OliverSuperTraction2.jpg)

would these be large enough to fill in the space from an SOA situation ?


Mike

[COLOFIREMAN]

A Cab & chassie dually or RV dually have narrower axles then a dually pickup truck ;) Just some FYI :thumbsup: if that help's you any . . .

Mike

Are you asking or telling me this fact???:confused: I guess your not very clear. If your telling me then yes I knew that.

[AMC-J/20]

I wanted to make sure you knew this fact :thumbsup:.

I was just trying to help you find what you needed to make your rig work out :thumbsup:.


Mike

[AMC-J/20]

:D This is how i would like my truck to sit when built weather a got flat bed or dually pickup truck . . .

Jeep J-5500 :cool: :
http://i305.photobucket.com/albums/nn232/HURSTSSAMX69/Jeep%20J-truck%20project/AMCJeepJ-55002.jpg

Now this is done with 245/70R19.5's 33.3" x 8.8" i was thinking of dropping down to the 225/70R19.5's 32.5" x 8.2" i don't think it would that much of difference in appearence but definitely more cost effective :thumbsup:

1. tires are $30-$50a tire cheaper.

2. I can use the standard 19.5 x 6.0 8 lug steel dually wheels.

with the 245's i would have start off with High dollar Alloy's as the 19.5 x 6.75 steel dually rims seem to be obsolete or offered in the wrong bolt circle :banghead:

225/70R19.5:
http://i305.photobucket.com/albums/nn232/HURSTSSAMX69/Tires/th_225R195.jpg (http://s305.photobucket.com/albums/nn232/HURSTSSAMX69/Tires/?action=view&current=225R195.jpg)

or

245/70R19.5:
http://i305.photobucket.com/albums/nn232/HURSTSSAMX69/Tires/245R195.jpg


Mike