Death wobble (I think) - Page 5 - Dodge Cummins Diesel Forum
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post #49 of 55 (permalink) Old 01-24-2017, 12:15 AM Thread Starter
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Originally Posted by cerberusiam View Post
At 1 degree positive caster and wide tires its gonna juke around on every rut and uneven surface on the road. Even stock didn't like less than 3 degrees and not wander. I usually start at 4 degrees and see if it likes that then back is off to see what happens. I think the suspension is still the same on the 2012 so it should react the same way.


4 degrees positive castor and then back off if needed? Back off to what?


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post #50 of 55 (permalink) Old 01-24-2017, 09:53 AM
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Sorry, back the caster off until it doesn't drive right. You want just enough caster to have positive handling, ie the truck goes straight on a level road and doesn't want to follow every little imperfection and groove. The more caster you run the more stress is place don the wheel bearings and ball joints.

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post #51 of 55 (permalink) Old 01-24-2017, 09:29 PM Thread Starter
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Tires changed. Toyo open country AT 2. I do feel less vibration going down the road even though they have a little noise they are smoother. I tried to get a death wobble and it was not as bad. It was a really good shake but not a wobble. I think the shocks may be bad. How would I know if they are bad if they are not leaking or anything?

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post #52 of 55 (permalink) Old 01-24-2017, 11:21 PM
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Simply cannot tell if the shocks are the problem until you change them. There may be absolutely nothing wrong with those shocks as built, for a light gas truck. Regardless of their marketing, most of these lift kit shocks are NOT valved correctly for a diesel truck. That takes a customized shock like Fox or King, or, a cheaper alternative is the Bilstein 5100 or 5160 series shocks, they are valved specifically for the diesels and do a much better job of rebound control.

The 5100 series is a bolt in for a 3" lift and as long as you aren't going for big articulation should work fine. IF you try to drop the axle too far they will hit the stops with a 3" lift and thta will eventually kill them, but, that takes some extreme terrain and jumps to do that.

The 5160's are a remote reservoir shock and work EXCELLENT for rough roads and heavy loads that cause most shocks to be useless once they warm up. Biggest problem aside form valving is the fade when they get hot which they can do on round roads. The 5160's will require a modified lower rise shock tower to work correctly so not exactly a bolt in application.
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post #53 of 55 (permalink) Old 01-24-2017, 11:33 PM Thread Starter
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Quote:
Originally Posted by cerberusiam View Post
Simply cannot tell if the shocks are the problem until you change them. There may be absolutely nothing wrong with those shocks as built, for a light gas truck. Regardless of their marketing, most of these lift kit shocks are NOT valved correctly for a diesel truck. That takes a customized shock like Fox or King, or, a cheaper alternative is the Bilstein 5100 or 5160 series shocks, they are valved specifically for the diesels and do a much better job of rebound control.

The 5100 series is a bolt in for a 3" lift and as long as you aren't going for big articulation should work fine. IF you try to drop the axle too far they will hit the stops with a 3" lift and thta will eventually kill them, but, that takes some extreme terrain and jumps to do that.

The 5160's are a remote reservoir shock and work EXCELLENT for rough roads and heavy loads that cause most shocks to be useless once they warm up. Biggest problem aside form valving is the fade when they get hot which they can do on round roads. The 5160's will require a modified lower rise shock tower to work correctly so not exactly a bolt in application.


If a fox or king which would be the he correct ones? Great info. Thx

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post #54 of 55 (permalink) Old 01-24-2017, 11:53 PM
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Not sure, you would have to check with Thuren or Carli to see what they recommend in those shocks, and, if they have a custom shock they like. I KNOW the Bilteins work because I am using them, the others I am not up to speed on.

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post #55 of 55 (permalink) Old 01-25-2017, 03:32 AM
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If a fox or king which would be the he correct ones? Great info. Thx
There are plenty of shocks, including 5160 Bilsteins, that bolt in with no special towers. Give me a call, and I can help you choose something to fit your needs.


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