Crazy shaking and jerking in my suspenion - Ford Powerstroke Diesel Forum
Suspension & Steering Discuss OEM & aftermarket suspension, lifts, air ride suspension, shocks, steering components, etc.

 
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post #1 of 9 Old 09-13-2009, 10:35 AM Thread Starter
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Crazy shaking and jerking in my suspenion

Im currently deployed and I just had a lift installed on my truck. I went with a 6 inch tough country with dual steering stabilizers. The truck drove fine before now that the lift is on my mechanic is telling me if you hit a bump above 30mph it starts hopping and jerking. Does any one have any idea of what the problem may be? Ive been told I may have some bushings out. Its a 2005 4x4 XL powerstroke with 47k miles on it. I had a front end alignment done on it 10k miles ago with stock suspenion and everything was fine. Any body have any ideas?

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WILD PHIL
U.S. ARMY INFANTRY 2005-PRESENT
05 FORD F250 4X4
Retired
6.0 PSD
SCT LIVE WIRE
CFM LARGE MOUTH
5" TURBO BACK
BRUTE FORCE INTAKE
STRAIGHT PIPED
6" LIFT W/DUAL STEERING STAB
16.5X10 M/T CLASSIC IIs
37X12.50S
380HP & 990TQ

08 6.4 F350
H&S Mini Max and 5" FP
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post #2 of 9 Old 09-13-2009, 11:03 AM
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You are experiencing the "death wobble" It's in your steering system, not suspension. It's not so good on the steering parts when this happens. Ford issued a TSB or some sort of bulletin on this and they claim it is mostly due to underinflated tires. Have your's checked. My truck did this with a pro-comp 6" lift and I had to get DR/Icon dual steering stabilizers to get it to go away. Doesn't do it anymore. I think the gas stabilizers are much better than the hydraulic stabilizers because they always are pulling the steering to the center. Unlike a hydraulic stabilizer, the gas ones will no remain where you push/pull the cylinder. They go back to center. Do some searching on "death wobble" because I'm 99% sure that's what your problem is.

-Kelly
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post #3 of 9 Old 09-13-2009, 11:17 AM Thread Starter
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OK thanks alot kelly. Turns out he hadnt installed the steering stabs yet. So hopefuly thats the suloution.

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WILD PHIL
U.S. ARMY INFANTRY 2005-PRESENT
05 FORD F250 4X4
Retired
6.0 PSD
SCT LIVE WIRE
CFM LARGE MOUTH
5" TURBO BACK
BRUTE FORCE INTAKE
STRAIGHT PIPED
6" LIFT W/DUAL STEERING STAB
16.5X10 M/T CLASSIC IIs
37X12.50S
380HP & 990TQ

08 6.4 F350
H&S Mini Max and 5" FP
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post #4 of 9 Old 09-13-2009, 12:24 PM Thread Starter
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Ok dual stabs are on and the problem is gone. Thanks alot Kelly.

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WILD PHIL
U.S. ARMY INFANTRY 2005-PRESENT
05 FORD F250 4X4
Retired
6.0 PSD
SCT LIVE WIRE
CFM LARGE MOUTH
5" TURBO BACK
BRUTE FORCE INTAKE
STRAIGHT PIPED
6" LIFT W/DUAL STEERING STAB
16.5X10 M/T CLASSIC IIs
37X12.50S
380HP & 990TQ

08 6.4 F350
H&S Mini Max and 5" FP
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post #5 of 9 Old 09-14-2009, 11:21 AM
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IMO lifts over 4" need the 4 link arms as you can add extra castor thats really needed on the '05 and up.
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post #6 of 9 Old 09-14-2009, 05:12 PM
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Have you had an alignment done since the lift?

I'd lean towards your caster being a little too negative and/or trac bar/trac bar bracket being loose.

Stabilizers will help minimize feedback from the road.....but the "death wobble" is caused by other issues.
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post #7 of 9 Old 09-15-2009, 07:27 AM Thread Starter
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sORRY GUYS, he acually installed the dual steering stabs. ONCE THOSE WERE ON IT WAS GOOD. nO PROBEMS SINCE THEN. hOPEFULLY THE WHEELS WILL FIT WITH THE SPACERS.

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WILD PHIL
U.S. ARMY INFANTRY 2005-PRESENT
05 FORD F250 4X4
Retired
6.0 PSD
SCT LIVE WIRE
CFM LARGE MOUTH
5" TURBO BACK
BRUTE FORCE INTAKE
STRAIGHT PIPED
6" LIFT W/DUAL STEERING STAB
16.5X10 M/T CLASSIC IIs
37X12.50S
380HP & 990TQ

08 6.4 F350
H&S Mini Max and 5" FP
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post #8 of 9 Old 09-15-2009, 07:33 AM Thread Starter
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ALso is it better to do the alignment with the 37s or the stock?
'

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WILD PHIL
U.S. ARMY INFANTRY 2005-PRESENT
05 FORD F250 4X4
Retired
6.0 PSD
SCT LIVE WIRE
CFM LARGE MOUTH
5" TURBO BACK
BRUTE FORCE INTAKE
STRAIGHT PIPED
6" LIFT W/DUAL STEERING STAB
16.5X10 M/T CLASSIC IIs
37X12.50S
380HP & 990TQ

08 6.4 F350
H&S Mini Max and 5" FP
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post #9 of 9 Old 09-15-2009, 04:57 PM
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As long as the shop can align it with the aftermarket tires and wheels then do it with them on.
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