Go Back   Ford Truck Enthusiasts Forums > Bronco > 1978 - 1996 Big Bronco
Sign in using an external account
Register Forgot Password?


1978 - 1996 Big Bronco SPONSORED BY:

Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 03-21-2009, 09:23 PM
MUSKY1011's Avatar
MUSKY1011 MUSKY1011 is offline
Senior User
 
Join Date: Apr 2000
Posts: 116
MUSKY1011 is starting off with a positive reputation.
Massive shake in front end after hitting pothole

The whole front end shakes violently after hitting pothole in the road
what the hell is going on??
Hate to happen on the freeeway
Bronco has 4 inch lift
welded lift brackets
This summer I was going to tear out the front end and replace all bushings any ways
Is it a stearing problem,ball joints or bushings-pivot,radius arms???
Give me some opinions please
Reply With Quote
  #2  
Old 03-21-2009, 10:51 PM
Kemicalburns's Avatar
Kemicalburns Kemicalburns is offline
Post Fiend
 
Join Date: Jul 2002
Location: OregonCity,OR
Posts: 13,367
Kemicalburns has a very good reputation on FTE.Kemicalburns has a very good reputation on FTE.Kemicalburns has a very good reputation on FTE.Kemicalburns has a very good reputation on FTE.
take it to an alignment shop they can give you a parts break down of what needs replaced. then go home and get dirty
__________________
-- FOR SALE g
94 XLT 357/E4OD/Warn HS9500I
6"ProComp Stage II 35x12.5x15 BFG AT's
4.88 gears/Aussie Front/rear open
Edelbrock efi intake JBA shorty,CustomY pipe/exhaust
http://www.supermotors.org/registry/...il.php?id=4158
Reply With Quote
  #3  
Old 03-22-2009, 07:59 AM
helirich helirich is offline
Posting Guru
 
Join Date: Apr 2006
Posts: 1,272
helirich is starting off with a positive reputation.
Probubly the stablizer is shot or not big enough for your tires.
__________________
90' Bronco, 351, MSD Ign., SS 3" exhaust,
38" x 15.50 R15 Dirt Grips, 14" x 15" Alcoa wheels
6" lift w/ cutout flares, 40 gal. fuel tank
F diff - lockright locker, 4.88's
R diff - Powertrax locker, 4.88's
Cast diff cover w/ carrier braces
Rear full float axles, truss, Above spring traction bars
Reply With Quote
  #4  
Old 03-22-2009, 12:18 PM
Zrock Zrock is offline
Junior User
 
Join Date: Oct 2008
Posts: 51
Zrock is starting off with a positive reputation.
Well if it happened after hitting a pothole check your front tires for damage. you may have blowen a belt in the tire when you hi the pothole look for any bulges in the tires. Also check the rim for damage and check to make sure all your wheel weights are still on the rims may have throwen one when you hit the pothole. you can also swap your tires from front to back and see if the vibration moves with it then this will tell ya if its tire/rim problem or stearing
Reply With Quote
  #5  
Old 03-22-2009, 09:23 PM
kingford72's Avatar
kingford72 kingford72 is offline
Senior User
 
Join Date: Jul 2005
Location: columbia PA
Posts: 493
kingford72 is starting off with a positive reputation.
you have what the 4x4 comunity calls the death wobble how long have you had your lift and what year bronco do you have it could be bushings it could also be to much tilt on your axle but probably not with a 4" lift
__________________
1978 F-150 4x4 351m 35" bfg's 4.11 gearz
1972 F-100 2wd mustang efi 5.0
1975 F350 Crew Cab lwb dually 460 4spd
1979 bronco 400 C6 *project*
I wish I had a 70's dump truck for my collection
Reply With Quote
  #6  
Old 03-22-2009, 09:38 PM
MUSKY1011's Avatar
MUSKY1011 MUSKY1011 is offline
Senior User
 
Join Date: Apr 2000
Posts: 116
MUSKY1011 is starting off with a positive reputation.
Lift has been on 7 years
The shake in the front end has been getting worse over the last year
Yesterday it was actually scary
Reply With Quote
  #7  
Old 03-22-2009, 09:40 PM
helirich helirich is offline
Posting Guru
 
Join Date: Apr 2006
Posts: 1,272
helirich is starting off with a positive reputation.
If it's smooth until you hit a bump. Then it goes to the shake and doesnt stop till you slow way down, its the death wobble. The answer is a good steering stabilizer. (or two if you are running 35" or bigger tires.)
__________________
90' Bronco, 351, MSD Ign., SS 3" exhaust,
38" x 15.50 R15 Dirt Grips, 14" x 15" Alcoa wheels
6" lift w/ cutout flares, 40 gal. fuel tank
F diff - lockright locker, 4.88's
R diff - Powertrax locker, 4.88's
Cast diff cover w/ carrier braces
Rear full float axles, truss, Above spring traction bars
Reply With Quote
  #8  
Old 03-22-2009, 09:47 PM
kingford72's Avatar
kingford72 kingford72 is offline
Senior User
 
Join Date: Jul 2005
Location: columbia PA
Posts: 493
kingford72 is starting off with a positive reputation.
you still didn't say the year of bronco you have, stabilizer could be wore out but mostlikly its the bushings. stabilizers can also hide a problem
__________________
1978 F-150 4x4 351m 35" bfg's 4.11 gearz
1972 F-100 2wd mustang efi 5.0
1975 F350 Crew Cab lwb dually 460 4spd
1979 bronco 400 C6 *project*
I wish I had a 70's dump truck for my collection
Reply With Quote
  #9  
Old 03-22-2009, 10:08 PM
MUSKY1011's Avatar
MUSKY1011 MUSKY1011 is offline
Senior User
 
Join Date: Apr 2000
Posts: 116
MUSKY1011 is starting off with a positive reputation.
1994
after market steering stabilzer
Reply With Quote
  #10  
Old 03-22-2009, 10:09 PM
MUSKY1011's Avatar
MUSKY1011 MUSKY1011 is offline
Senior User
 
Join Date: Apr 2000
Posts: 116
MUSKY1011 is starting off with a positive reputation.
Click the image to open in full size.
Reply With Quote
  #11  
Old 03-22-2009, 10:41 PM
kingford72's Avatar
kingford72 kingford72 is offline
Senior User
 
Join Date: Jul 2005
Location: columbia PA
Posts: 493
kingford72 is starting off with a positive reputation.
nice bronco what condition are the bushings in, since you said you were going to change them this summer anyways are they poly(good) or rubber(probably shot after 7 years) are the shocks and stabilizer as old as the lift. The ttb doesn't suffer from this as much as solid axle rigs do it comes from looseness somewhere or specs out of spec do you have the radius arm spacers or the extended superlift arms looks like the spacers from your pitchure can't see the long thing under the front fender. I had a 85 short bed with the 6" lift with ext. arms and the steering system, cut outs and 35" tire the ttb can give some awsome articulation. I helped a friend of mine put 9" of lift on a jeep cherokee and when we lengthend the arms we mis measured the bottoms by 1/2" which set the caster angle out past the max 7.5 degrees and it developed the death wobble, put that 1/2" in the lower arms and it went away though it still feels loose over bumpy roads but no shake.
__________________
1978 F-150 4x4 351m 35" bfg's 4.11 gearz
1972 F-100 2wd mustang efi 5.0
1975 F350 Crew Cab lwb dually 460 4spd
1979 bronco 400 C6 *project*
I wish I had a 70's dump truck for my collection
Reply With Quote
  #12  
Old 03-22-2009, 10:57 PM
kingford72's Avatar
kingford72 kingford72 is offline
Senior User
 
Join Date: Jul 2005
Location: columbia PA
Posts: 493
kingford72 is starting off with a positive reputation.
It would be good idea to put your bronco up on stands and go through and check the torque on all your nut and bolts and pay attention to the axle drop brackets to see if any loosness has wore or bent them.
__________________
1978 F-150 4x4 351m 35" bfg's 4.11 gearz
1972 F-100 2wd mustang efi 5.0
1975 F350 Crew Cab lwb dually 460 4spd
1979 bronco 400 C6 *project*
I wish I had a 70's dump truck for my collection
Reply With Quote
  #13  
Old 03-22-2009, 11:45 PM
greystreak92's Avatar
greystreak92 greystreak92 is offline
Post Fiend
 
Join Date: Sep 2002
Location: Gateway to the West
Posts: 9,045
greystreak92 has a great reputation on FTE.greystreak92 has a great reputation on FTE.greystreak92 has a great reputation on FTE.greystreak92 has a great reputation on FTE.greystreak92 has a great reputation on FTE.
Steering stabilizer = poor man's solution to an otherwise fixable problem. (Argue if you feel it necessary but you won't change my mind. Never run one and never will.)

Lets go back through this one step at a time.

1. The truck has had minor shuddering in the front end for a while.
2. The truck is lifted.
3. The truck has larger-than-stock tires and therefore has additional unsprung weight to deal with.
4. You hit a pothole and things got significantly WORSE.
5. Your symptoms are indicative of a failed bushing or mounting.

Put the truck up on something strong enough to support it at the frame and let the front end hang there. (Take the front wheels off if you can't get it high enough for the wheels to clear the pavement.) Without the weight of the truck, you can crawl around and have a close look (and a tug) at every bushing and bolt. Pay particular attention to any bushing or bolt that actually attaches the axle to the truck. I.E. axle pivots and radius arms first since these two sets of mounts are the only semi-rigid connection between the axle halves and the frame of the truck. And take time to check bolts and such that are not typically service points because hitting a pothole hard enough can damage these as well.

I personally chased the exact issue you are dealing with for three months and several ASE mechanics couldn't find it. I finally found a broken axle pivot mounting bracket... not the bushing or bolt but the OEM bracket had sheared off just above the bushing.
__________________
The only stupid question is the one you DON'T ask!

Big Bronco FAQ's

Reply With Quote
  #14  
Old 03-23-2009, 07:52 AM
helirich helirich is offline
Posting Guru
 
Join Date: Apr 2006
Posts: 1,272
helirich is starting off with a positive reputation.
While I agree a stablizer can mask some problems, that doesnt mean you dont need one. If you dont run one, your bushings and such will ware much faster. We all know about the stories of broken thumbs hooked in the steering wheel when you hit a rock. On my old Bronco, I had the exact same symptoms. Took the factory stab off. Replaced it with a double stab. End of problem. It may be that it had a bad bushing, but it never showed up for alot of years after that. Some people cant run to the alianment shop every other week just because they went off roading.
__________________
90' Bronco, 351, MSD Ign., SS 3" exhaust,
38" x 15.50 R15 Dirt Grips, 14" x 15" Alcoa wheels
6" lift w/ cutout flares, 40 gal. fuel tank
F diff - lockright locker, 4.88's
R diff - Powertrax locker, 4.88's
Cast diff cover w/ carrier braces
Rear full float axles, truss, Above spring traction bars
Reply With Quote
  #15  
Old 03-23-2009, 08:29 PM
kingford72's Avatar
kingford72 kingford72 is offline
Senior User
 
Join Date: Jul 2005
Location: columbia PA
Posts: 493
kingford72 is starting off with a positive reputation.
yeah you need one stabilizer to control bumps that jarr the steering and help it control to take stress out of components but too many are just hiding a problem when you get a double stabilizer check the part #s there not giving you 2 singles to mount there giving you 2 that are valved different because two singles is too much. I had the death wobble a coulple times and until I learned what to do most shops look at it and say uhh thats because of those big tires because they don't want to deal with it or are just as lost as you are. I had a dealership write on my repair slip unit is unsafe to drive at any speed one time.
__________________
1978 F-150 4x4 351m 35" bfg's 4.11 gearz
1972 F-100 2wd mustang efi 5.0
1975 F350 Crew Cab lwb dually 460 4spd
1979 bronco 400 C6 *project*
I wish I had a 70's dump truck for my collection
Reply With Quote
Old 03-23-2009, 08:29 PM
 
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
'78 F-150 4x4 Death Wobble after hitting a pothole, what might be the cause? FordMaverickFan 1973 - 1979 F-100 & Larger F-Series Trucks 9 12-19-2012 06:58 PM
Can't find front end clunk. hammer65 1999 - 2003 7.3L Power Stroke Diesel 7 02-19-2011 06:58 PM
help with rattle Skullonarm Excursion - King of SUVs 7 08-08-2009 01:21 PM
Violent shaking after hitting a bump etc. Aerik 1987 - 1996 F150 & Larger F-Series Trucks 6 09-07-2005 02:49 PM
Shake in front end Twist 1999 - 2003 7.3L Power Stroke Diesel 12 09-24-2002 02:20 PM


Go Back   Ford Truck Enthusiasts Forums > Bronco > 1978 - 1996 Big Bronco

Tags
1996, arm, bolts, bracket, broke, bronco, bump, drop, end, front, hit, loose, pothole, radius, shake, shaking, superlift, truck

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

Forum Jump


Participate In The Forums

Create new posts and participate in discussions. It's free!

Sign Up »





All times are GMT -5. The time now is 11:40 AM.


Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Advertising - Terms of Use - Privacy Statement - Jobs
This forum is owned and operated by Internet Brands, Inc., a Delaware corporation. It is not authorized or endorsed by the Ford Motor Company and is not affiliated with the Ford Motor Company or its related companies in any way. Ford® is a registered trademark of the Ford Motor Company.

vbulletin Admin Backup