death wobble - Pirate4x4.Com : 4x4 and Off-Road Forum

FJ40Dude75 · 02-02-2003, 03:32 PM

I just cant figure out this problem I have a 5 " pinicale lift 35"s and minitruck power steering i replaced my stock dampener with them one from jto and i also have a bolt on rancho but if i hit a pothole it wobbles so bad I have to almost stop please help me

MD11Fr8Dog · 02-02-2003, 05:25 PM

Quote:

Originally posted by FJ40Dude75
I just cant figure out this problem I have a 5 " pinicale lift 35"s and minitruck power steering i replaced my stock dampener with them one from jto and i also have a bolt on rancho but if i hit a pothole it wobbles so bad I have to almost stop please help me

TRE's? Is there any shackle lift? Caster Angle? Knuckle bearings?

FJ40Dude75 · 02-02-2003, 05:44 PM

yes 1 inch lift shackles and 6degree shims
which i am yanking out this week cause I am a dumb a** and listened to an idiot

proffitt'scruisers · 02-02-2003, 09:36 PM

I had a customer bring me a rig with a similar complaint. A quick inspection revealed loose u-bolts on the front end. Check-em

FIXXXXAH · 02-02-2003, 10:31 PM

AH HEM. PLEASE STAY CALM WHILE I HIJACK THIS THREAD FOR A MOMENT. NO ON WILL BE HARMED.

NOW THEN, WHILE YOUR TALKING ABOUT UBOLTS, I DONT SUPPOSE YOU HAVE A NAPA PN FOR GOOD U BOLTS WITH ENOUGH LENGTH AND THREAD THAT YOU CAN USE THEM ON BOTH FRONT AND REAR SPRING PACKS, WITH THE EXCEPTION OF THE ONE LONG PASS SIDE ONE, DO YOU JERIMIAH?

bruter · 02-03-2003, 09:39 AM

How 'bout tie rod ends ?

Pin Head · 02-03-2003, 09:57 AM

There are two factors that contribute to the death wobble:
1) excess play in anything that locates the wheel (wheel bearings, knuckle bearings, tie rod ends, steering box and linkage, U bolts, spring bushings.)
2) Alignment. Excesive toe in or toe out (this provides high side to side force). Caster too close to zero (no self centering force).

You need to eliminate both factors.

cruiserbrett · 02-03-2003, 10:38 AM

Quote:

Originally posted by FIXXXXAH
AH HEM. PLEASE STAY CALM WHILE I HIJACK THIS THREAD FOR A MOMENT. NO ON WILL BE HARMED.

NOW THEN, WHILE YOUR TALKING ABOUT UBOLTS, I DONT SUPPOSE YOU HAVE A NAPA PN FOR GOOD U BOLTS WITH ENOUGH LENGTH AND THREAD THAT YOU CAN USE THEM ON BOTH FRONT AND REAR SPRING PACKS, WITH THE EXCEPTION OF THE ONE LONG PASS SIDE ONE, DO YOU JERIMIAH?

There were a few at napa that had the right dimensions but they were $9+ each!!! I just priced them out with a patient Napa guy on Friday night. That is about 160/set with tax. Nope, get a set from a spring supplier.

proffitt'scruisers · 02-03-2003, 10:42 AM

Quote:

. Nope, get a set from a spring supplier.

He's right...I get mine made at the spring works in Grand Junction.
They are never over $60 a set

TxCruzr · 02-03-2003, 03:36 PM

you know how I got mine to drive smooth...no play...no wobble...no bump steer...no wandering...
Got me one of these

Joseph

fjdan · 02-03-2003, 04:06 PM

a buddy of mine had a very similar problem but in a early bronco and the shake was so bad that once it started you actually had to pull over and stop in order to get it to go away and as we tried to work our way through all the possible problems it was getting worse and worse every day to the point where it would almost rip the wheel out of your hand if you did not stop fast enough we have replaced everything except the power steering box and that is on order and we are pretty sure that this will solve the problem as we believe that whats happening is there is a worn spot in the box where it has worn through the case hardening and now is bouncing back and forth horribly anyways bla bla bla try the box and let me know thanks

Mark '73 FJ40 · 02-03-2003, 06:55 PM

Quote:

There are two factors that contribute to the death wobble:
1) excess play in anything that locates the wheel (wheel bearings, knuckle bearings, tie rod ends, steering box and linkage, U bolts, spring bushings.)
2) Alignment. Excesive toe in or toe out (this provides high side to side force). Caster too close to zero (no self centering force).

You need to eliminate both factors.

Don't forget uneven tire wear caused by any of the above.

alaashul · 02-03-2003, 07:31 PM

http://www.bc4x4.com/pr/2002/ram/

your redneck ram assist

4004ever · 02-03-2003, 08:26 PM

check caster for sure. Even if you diconnected all your steering components, your caster angle would allow you to go down the road straight, without vibration. If caster is good, then check your toe alignment. If you have a toe in or toe out, and bad kingpin bearings, you have a wobble happening.

Shaun

trd55 · 02-04-2003, 01:08 AM

Quote:

Originally posted by TxCruzr
you know how I got mine to drive smooth...no play...no wobble...no bump steer...no wandering...
Got me one of these

Joseph

Not trying to hi jack this thread again or anything, but Joseph, please tell me what I am seeing on your axle?? I see a diff that looks to be flipped over, but still offset to the passenger side. The perches look to be in the proper place when installed in the original configuration, not to mention the low drain plug that would be at the right height if installed in the original configuration. Info please..

Gig'em

Darius '95

ScottFJ40 · 02-04-2003, 07:05 AM

Quote:

Originally posted by trd55

Not trying to hi jack this thread again or anything, but Joseph, please tell me what I am seeing on your axle?? I see a diff that looks to be flipped over, but still offset to the passenger side. The perches look to be in the proper place when installed in the original configuration, not to mention the low drain plug that would be at the right height if installed in the original configuration. Info please.. Gig'em

Darius '95

Hydro assist

FIXXXXAH · 02-04-2003, 02:22 PM

I THINK HE IS ASKING WHY IT LOOKS LIKE THE AXLE IS SET UP SPRUNG OVER FROM THE FACTORY, NOT ABOUT THE RAM ASSIST, RIGHT?

trd55 · 02-04-2003, 03:05 PM

Quote:

Originally posted by FIXXXXAH
I THINK HE IS ASKING WHY IT LOOKS LIKE THE AXLE IS SET UP SPRUNG OVER FROM THE FACTORY, NOT ABOUT THE RAM ASSIST, RIGHT?

BINGO...

TxCruzr · 02-04-2003, 07:34 PM

It looks like it was SOA from the factory just because the guy that did it did a very clean job.
trd55...sounds like we have another aggie on the board

Joseph

trd55 · 02-04-2003, 10:47 PM

Quote:

Originally posted by TxCruzr
It looks like it was SOA from the factory just because the guy that did it did a very clean job.
trd55...sounds like we have another aggie on the board

Joseph

Howdy!!! I have lurked for awhile and slowly gathered info. Been web wheeling for most of te time. Hopefully start wheeling my 60 in a couple of weeks.

What is with the low fill plug on your diff??? SOA does look clean Had a nice touch getting all the original brackets off with out destroying them. Looks good. Maybe I'll get back to Texas in a relatively short period of time, and we can wheel together. I been gone to long. (sniff, sniff). See ya, Whoop!!!

-D

02-02-2003, 03:32 PM	#1 (permalink)
FJ40Dude75 Registered User Join Date: Jul 2002 Member # 12889 Location: allentownPA Posts: 191	death wobble I just cant figure out this problem I have a 5 " pinicale lift 35"s and minitruck power steering i replaced my stock dampener with them one from jto and i also have a bolt on rancho but if i hit a pothole it wobbles so bad I have to almost stop please help me

02-02-2003, 09:36 PM	#4 (permalink)
proffitt'scruisers Registered User Join Date: Nov 2002 Member # 15204 Location: Austin, Colorado Posts: 717	wob I had a customer bring me a rig with a similar complaint. A quick inspection revealed loose u-bolts on the front end. Check-em

02-02-2003, 10:31 PM	#5 (permalink)
FIXXXXAH Registered User Join Date: Feb 2001 Member # 3259 Location: NORTHERN NM Posts: 1,258	AH HEM. PLEASE STAY CALM WHILE I HIJACK THIS THREAD FOR A MOMENT. NO ON WILL BE HARMED. NOW THEN, WHILE YOUR TALKING ABOUT UBOLTS, I DONT SUPPOSE YOU HAVE A NAPA PN FOR GOOD U BOLTS WITH ENOUGH LENGTH AND THREAD THAT YOU CAN USE THEM ON BOTH FRONT AND REAR SPRING PACKS, WITH THE EXCEPTION OF THE ONE LONG PASS SIDE ONE, DO YOU JERIMIAH? __________________ [SIZE=1] "ANYONE WILLING TO TRADE FREEDOM FOR SECURITY DESERVES NEITHER." TUBING AND BUGGIES ARE OVERRATED METRIC ROCKS. [/SIZE]

02-03-2003, 09:39 AM	#6 (permalink)
bruter Registered User Join Date: Nov 2002 Member # 15205 Location: Everywhere, but mainly CO. Posts: 237	How 'bout tie rod ends ? __________________ 66' Toyota LC, 2 1/2 ton Rockwells, 4 Link, 44's, Propane...

02-03-2003, 03:36 PM	#10 (permalink)
TxCruzr Wait this ain't Tx.. Join Date: Jan 2002 Member # 9380 Location: Del Boca Vista, AZ Posts: 2,191	you know how I got mine to drive smooth...no play...no wobble...no bump steer...no wandering... Got me one of these Joseph Attached Images __________________ "There is no hunting like the hunting of man, and those who have hunted armed men long enough and liked it, never care for anything else thereafter." -Ernest Hemingway '69 FJ-40 - under construction

02-02-2003, 05:44 PM	#3 (permalink)
FJ40Dude75 Registered User Join Date: Jul 2002 Member # 12889 Location: allentownPA Posts: 191	yes 1 inch lift shackles and 6degree shims which i am yanking out this week cause I am a dumb a** and listened to an idiot

02-03-2003, 09:57 AM	#7 (permalink)
Pin Head Registered User Join Date: May 2001 Member # 4783 Location: Orange Co. CA Posts: 1,797	There are two factors that contribute to the death wobble: 1) excess play in anything that locates the wheel (wheel bearings, knuckle bearings, tie rod ends, steering box and linkage, U bolts, spring bushings.) 2) Alignment. Excesive toe in or toe out (this provides high side to side force). Caster too close to zero (no self centering force). You need to eliminate both factors.

02-03-2003, 04:06 PM	#11 (permalink)
fjdan Registered User Join Date: Jul 2002 Member # 12781 Location: courtenay B.C. Canada Posts: 37	a buddy of mine had a very similar problem but in a early bronco and the shake was so bad that once it started you actually had to pull over and stop in order to get it to go away and as we tried to work our way through all the possible problems it was getting worse and worse every day to the point where it would almost rip the wheel out of your hand if you did not stop fast enough we have replaced everything except the power steering box and that is on order and we are pretty sure that this will solve the problem as we believe that whats happening is there is a worn spot in the box where it has worn through the case hardening and now is bouncing back and forth horribly anyways bla bla bla try the box and let me know thanks

02-03-2003, 07:31 PM	#13 (permalink)
alaashul Registered User Join Date: Sep 2002 Member # 14016 Location: GA Posts: 4	http://www.bc4x4.com/pr/2002/ram/ your redneck ram assist

02-03-2003, 08:26 PM	#14 (permalink)
4004ever Registered User Join Date: Mar 2002 Member # 10478 Location: Calgary, Alberta, Canada. Posts: 115	check caster for sure. Even if you diconnected all your steering components, your caster angle would allow you to go down the road straight, without vibration. If caster is good, then check your toe alignment. If you have a toe in or toe out, and bad kingpin bearings, you have a wobble happening. Shaun __________________ 1997 TJ, 4" stage 2 procomp, 33's, xd9000i.

02-04-2003, 02:22 PM	#17 (permalink)
FIXXXXAH Registered User Join Date: Feb 2001 Member # 3259 Location: NORTHERN NM Posts: 1,258	I THINK HE IS ASKING WHY IT LOOKS LIKE THE AXLE IS SET UP SPRUNG OVER FROM THE FACTORY, NOT ABOUT THE RAM ASSIST, RIGHT? __________________ [SIZE=1] "ANYONE WILLING TO TRADE FREEDOM FOR SECURITY DESERVES NEITHER." TUBING AND BUGGIES ARE OVERRATED METRIC ROCKS. [/SIZE]

02-04-2003, 07:34 PM	#19 (permalink)
TxCruzr Wait this ain't Tx.. Join Date: Jan 2002 Member # 9380 Location: Del Boca Vista, AZ Posts: 2,191	It looks like it was SOA from the factory just because the guy that did it did a very clean job. trd55...sounds like we have another aggie on the board Joseph __________________ "There is no hunting like the hunting of man, and those who have hunted armed men long enough and liked it, never care for anything else thereafter." -Ernest Hemingway '69 FJ-40 - under construction

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