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Old 08-13-2019, 07:10 PM   #91
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Having driven a straight truck with lockable rear diff I can tell you it'll still put up a fight if you try to turn with the diff lock engaged. On the one hand the long wheelbase compared to a jeep suggests that the steers have more leverage to overcome the straight-forwardness but on the other hand the sheer weight of the rig means the traction of those rear duals can just keep pushing forward regardless of what the steers are doing. Maybe it would be less resistant with a single drive axle truck but there was simply no steering a tandem drive axle truck with diffs locked.
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Old 08-13-2019, 09:35 PM   #92
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Thanks for the Deitroit locker info. I've heard they can be noisy. An air activated diff lock would be ideal but not available for my axle. The Detroit locker is an option for my diff carrier from Spicer.

Ted
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Old 08-14-2019, 07:18 AM   #93
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Originally Posted by o1marc View Post
How much is that new Cab/Chassis?

No price on that one but if you look you can find between 50- 75 grand new depending on GVW. Heavy truck prices have crashed and going lower.
Time to buy is at the bottom and we should hit that over the next 12 months.
Just figure what a based used truck would cost and then the gear/parts required and the cost of doing it.

You may save some in the short run but it will cost more in the end.


That and the idea that some amateur put the thing together and is rolling 20 tons at highway speeds make my skin crawl. Death Wobble is real and even new vehicles suffer from it. Sometimes this forums goes way over the crazy dangerous line with things. Hobby building heavy trucks into 4wd is one of them.
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Old 08-15-2019, 06:03 AM   #94
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Originally Posted by Mudhutwarrior View Post
No price on that one but if you look you can find between 50- 75 grand new depending on GVW. Heavy truck prices have crashed and going lower.
Time to buy is at the bottom and we should hit that over the next 12 months.
Just figure what a based used truck would cost and then the gear/parts required and the cost of doing it.

You may save some in the short run but it will cost more in the end.

You talk about that like it is chump change. BTW, exactly what GVW are you talking about for 50-75 grand new, a 1 ton?



Quote:
Originally Posted by Mudhutwarrior View Post
That and the idea that some amateur put the thing together and is rolling 20 tons at highway speeds make my skin crawl. Death Wobble is real and even new vehicles suffer from it. Sometimes this forums goes way over the crazy dangerous line with things. Hobby building heavy trucks into 4wd is one of them.

What is "Death Wobble"? Who makes this crap up? Sounds like a millennial video game programmer/writer. Usually, for the media to give some phenomena a name, it has to be fairly common and I've never heard of it.


"rolling 20 tons at highway speeds " All the big 4x4/off road stuff that I have seen could barely do convoy speeds of 50 mph. A lot can't exceed 40 mph and its not comfortable or cheap to drive. I'm sure you could make it go faster, but why? i'm hoping that someone with the ability to actually put it together is going to have some degree of sense...then there is the DOT inspection to legally get it on the highway...maybe wishful thinking. Besides, even if they bought a new one, they would probably modify it. Are you saying that hobby building 2wd heavy trucks is safe/safer? Is it modifying heavy trucks or just modifying the drive system that you think is dangerous? 20 tons is a pretty big school bus
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Old 08-15-2019, 06:16 AM   #95
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Death Wobble is common in the dodge one ton trucks. This nick name comes about because once the front end starts to wobble it shakes the truck so bad you have to slow way down to get it to stop, and if you dont it acts as if it will shake the truck to pieces. handling becomes unmanageable too. It is a very poor front suspension design. I think they need some hobbiest to teach them fancy engineers how to build a front end...
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Old 08-15-2019, 06:50 AM   #96
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Originally Posted by Ronnie View Post
Death Wobble is common in the dodge one ton trucks. This nick name comes about because once the front end starts to wobble it shakes the truck so bad you have to slow way down to get it to stop, and if you dont it acts as if it will shake the truck to pieces. handling becomes unmanageable too. It is a very poor front suspension design. I think they need some hobbiest to teach them fancy engineers how to build a front end...
It also exists on jeeps( where the name truely started) and high mileage fords. Similar designed front ends on the solid axle front ends. It is real and it has caused problems. It starts at engineering.
Poor attempts to gain ride quality and noise abatement.
Leaf spring front ends like most hobbiest due on this heavy of a vehicle should never get the wobble. But all other parts of the conversion can be scary if not done right.
Fabricated parts by guys who just bought their first welder is what scares me.
20 ton ? More like 16 tons lol. We could open conversations on this but the reality is

For got to add the 50 mph speed is pretty true the truck I posted with the 4x4 has 7.17:1 gears in it. Plug that into your speed calculator.
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Old 08-15-2019, 09:49 AM   #97
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Here is a cheap 4x4 chasis donor https://www.govdeals.com/index.cfm?f...93&acctid=3934
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Old 08-15-2019, 10:35 AM   #98
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Quote:
Originally Posted by Ronnie View Post
Death Wobble is common in the dodge one ton trucks. This nick name comes about because once the front end starts to wobble it shakes the truck so bad you have to slow way down to get it to stop, and if you dont it acts as if it will shake the truck to pieces. handling becomes unmanageable too. It is a very poor front suspension design. I think they need some hobbiest to teach them fancy engineers how to build a front end...
I haven't experienced that since I was a teen driving old cars that shouldn't have been on the road - front ends so loose that you could move them inches by shaking them by hand - I'd forgotten all about it until I read your post - 'haven't heard another word about it in 55 years until this
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Old 08-15-2019, 10:53 AM   #99
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@JustKip, I missed this thread for a couple of days, but yes, Wolf Creek Motors does 4X4 conversions. They use certain old military trucks and ambulances as donor vehicles. They put front differentials from these into schoolbuses. When I bought my BlueBird in April, they were working on converting a 29 foot, front engine Bluebird into a 4X4, very cool looking rig. Wolf Creek Motors is easy to find, and I was very pleased with my dealings with them.
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Old 08-15-2019, 11:15 AM   #100
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Originally Posted by kidharris View Post
You talk about that like it is chump change. BTW, exactly what GVW are you talking about for 50-75 grand new, a 1 ton?


Heavy trucks are cheaper than most pick ups these days. Take a look.

Since pick ups are now 50 grand you would be surprised at the prices of heavy cab/chassis.
You just need to be aware of these things. I just bought a one ton van, low mileage for 14k. Same in a pick up with same mileage is more than twice that for the same year. People are not practical any more and that make prices insane.





What is "Death Wobble"? Who makes this crap up? Sounds like a millennial video game programmer/writer. Usually, for the media to give some phenomena a name, it has to be fairly common and I've never heard of it.


"rolling 20 tons at highway speeds " All the big 4x4/off road stuff that I have seen could barely do convoy speeds of 50 mph. A lot can't exceed 40 mph and its not comfortable or cheap to drive. I'm sure you could make it go faster, but why? i'm hoping that someone with the ability to actually put it together is going to have some degree of sense...then there is the DOT inspection to legally get it on the highway...maybe wishful thinking. Besides, even if they bought a new one, they would probably modify it. Are you saying that hobby building 2wd heavy trucks is safe/safer? Is it modifying heavy trucks or just modifying the drive system that you think is dangerous? 20 tons is a pretty big school bus

Any one who has driven a heavy truck with kingpins knows about death wobble. Heavy 4wds do it with a lot less wear. I know as I have owned three in the past twenty years. Factory built ones. It happens, its the nature of it. Fords and Jeeps do it new and those are light trucks. In a heavy truck its zero fun and dangerous at speed. I had an international that would not stop until I came to a complete stop. Started doing it at 20k miles. Only 4wd heavy trucks I have heard that don't have that issue is Tatras.
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