My Toy
New User
Joined: Jun 2001
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My Toy
I'm working on building a toy for myself using a 390 out of a 73, and I'm using a C6 out of another thrashed truck with a NP205. I will be running a second T-case turned around behind it. I saw this in a magizine and I liked it. The second T-case is a NP203 and will have to be converted to part time, along with the first T-case. I will be running two driveshafts to the rear to run two dually axles with the biggest tires I can fit back there, without making them rub together. I'm thinking of adding a gear splitter in there somewhere for racing purposes. I plan on building the frame for this myself, there isn't going to be a body for this thing so it can sit fairly low. What kind of suspension will survive an occasional jump now and then, or at least last as long as possible? And is there anything I am overlooking? The front axle is going to be a Dana 60 I'm thinking. And will a bored over 390 with a double carb kit enough to hit good speed in the sand, while running both rear axles?
Thanks Derek
Thanks Derek
Elder User
Joined: Jan 2000
Posts: 661
Likes: 1
From: Villa Ridge, MO
My Toy
I dont know but i want pictures when you get done!!! WOW....you got bigger ones then me my friend. But one thing about the suspention....if you can find a way to make a 4 link...that seems to work good for stability. Ever think of finding a tandom
rear out of an 18 wheeler? Might work.....good luck!
Dan "Mudinford" MacDonald
Rather be pushing a Ford than driving a Chevy.
Like A Rock......In Water!
rear out of an 18 wheeler? Might work.....good luck!
Dan "Mudinford" MacDonald
Rather be pushing a Ford than driving a Chevy.
Like A Rock......In Water!
Senior User
Joined: Apr 2001
Posts: 172
Likes: 0
My Toy
The biggest problem will be running the driveshaft to the rear axle. For the most part vehicles with tandem rear axles have gross vehicular weight ratings over 36,000 pounds. So it will be really difficult to find a setup to swipe off of another vehicle without being way too big and bulky. My suggestion would be to offset at least one of the center sections and driveshafts on the rear axles. Any shop that can narrow axles will be able to do this for you. And then have the corresponding output shaft on the transfer case be similarly offset. This will give you some more room to angle the rear driveshaft over the middle axle as you won't have the pumpkin to clear, only the axle tubes.
There is an article on a 6wd Land Rover from Australia that I saw on the internet a while back, done with two transfer cases the same as you're planning. I think they located the second transfer case behind the center axle, with a short shaft connecting it to the rear axle. This would require quite a bit of space between the center and rear axles but would probably be the simplest way to do it.
There is an article on a 6wd Land Rover from Australia that I saw on the internet a while back, done with two transfer cases the same as you're planning. I think they located the second transfer case behind the center axle, with a short shaft connecting it to the rear axle. This would require quite a bit of space between the center and rear axles but would probably be the simplest way to do it.
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