1979 4x4 F150-front end ViBrAtIoN - Ford Muscle Forums : Ford Muscle Cars Tech Forum
FordMuscleForums.com is the premier Ford Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools
Old 04-13-2007, 12:03 AM   #1 (permalink)
Registered User
 
Join Date: Jul 2004
Location: Nebraska
Posts: 1,006
1979 4x4 F150-front end ViBrAtIoN

OK, so I brought my '79 4x4 half ton back online.
Been driving as a daily driver for around a month now.
My problem is serious, and can't seem to pin point it:
at any speed over 45-50 mph, if I hit a section a wash board road, a decent dip, bump or other problem on the road, the front end shimmys and shakes like a...well, it's bad. I'd rattle your fillings out of your teeth bad.
It makes me cringe driving the truck on the highway or interstate, and it was never like this before.
I slam the brakes, slow the truck down, and it goes away.
My dad owned the truck since 1991, it got a full frame off of sorts, rebuilt 400.
I redid the heads a year and a half ago after a blown head gasket, and put on a 4 barrel edlebrock intake and carb.
I am debting a few things:
I knew the shocks were junk, they were installed in 1993. Because this was a hunting/work truck for my dad, and not his driver, he was fine with it.
I put new shocks, last summer I did radius rod bushings.
Front end was rebuild years back, had alignment bushings installed.
This is a plow truck, aswell, but the tires do not wear odd at all.
A shop installed a new steering box 3-4 years ago.
The steering feels a little loose, but I can't seem to find a problem with it in the air.
At this point, I am debating tie rods or an issue with the castor.
The tires are still balanced, if on a smooth road, this thing rides nice, no tire shake. Tires are a 6 ply stock size 235/75/15.
Anyone out there, HELP!
__________________
eliteman76
1972 Torino GTS 351c 4v cj 4 speed
1973 Torino GTS-1979 F150 4x4
eliteman76 is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 04-13-2007, 12:06 AM   #2 (permalink)
Registered User
 
Join Date: Jul 2004
Location: Nebraska
Posts: 1,006
1979 4x4 F150-front end ViBrAtIoN

Oh, sorry, forgot the picture of Old Blue!

__________________
eliteman76
1972 Torino GTS 351c 4v cj 4 speed
1973 Torino GTS-1979 F150 4x4
eliteman76 is offline   Reply With Quote Quick reply to this message
Old 04-13-2007, 08:13 AM   #3 (permalink)
Registered User
 
Join Date: Nov 2003
Location: Las Vegas
Posts: 2,502
1979 4x4 F150-front end ViBrAtIoN

sounds like it might be king pins if your car has them if not ball joints
dbu8554 is offline   Reply With Quote Quick reply to this message
Old 04-13-2007, 09:25 AM   #4 (permalink)
Premium Member
 
Join Date: Sep 2004
Location: Sunny Arid Desolate Port Orchard WA
Posts: 34,377
1979 4x4 F150-front end ViBrAtIoN

I am willing to go out on a limb here and suggest a steering shock be installed onto yout center link.

Also, the Trunion bearings (AKA: knuckle bearings) could be crap as well.

Thirdly, any vehicle with more weight on the front than the factory prescribed will act funny if you hit a bump going that fast...

Lastly, what happened to you is known to me as the 5-Ton Shuffle, or the FJ death Rattles, or the Willy's Shimmy.... Happens on a lot of vehicles but mostly bias ply wheeled or big 4X4's...

Suggsestions: Tighten the nut's on the radius arms. The bushings were new recently and they may have settled and gotten a bit sloppy on you.
Install a steering stabilizer. I'll bet those two things will cure your issue.
Also, remove the shocks and get waranty replacements. so everything is perfect again.

Finally: Stop driving through bar ditches at 55 mph

_________________
I'm so depressed... My doctor refused to write me a prescription for Viagra. He said it would be like putting a new flagpole on a condemned building...

<font size=-1>[ This Message was edited by: FEandGoingBroke on 4/14/07 12:26am ]</font>
FEandGoingBroke is offline   Reply With Quote Quick reply to this message
Old 04-13-2007, 03:55 PM   #5 (permalink)
Registered User
 
Join Date: Jul 2004
Location: Nebraska
Posts: 1,006
1979 4x4 F150-front end ViBrAtIoN

Fe, thanks for the info;
It has a single stabilizer on the front, and while it's a little old, the unit is still pressurized and functional.
I plan on replacing it anyways, but right now $$$ are tighter than I prefer, and I am getting my Torino street legal next week.
I am going to work on inspecting the entire front end again this weekend, I am almost betting maybe the driver's tie rod is partially to blame.
One other thing, I have noticed a popping up front, at first I thought maybe a brake caliper, but now I got to wondering about your thought of the radius rods.
Thank you for bringing that up.
Will try to update later this weekend.
__________________
eliteman76
1972 Torino GTS 351c 4v cj 4 speed
1973 Torino GTS-1979 F150 4x4
eliteman76 is offline   Reply With Quote Quick reply to this message
Old 04-27-2007, 10:09 PM   #6 (permalink)
Registered User
 
Join Date: Jul 2004
Location: Nebraska
Posts: 1,006
1979 4x4 F150-front end ViBrAtIoN

Well, I did the track bar bushings, they were completely rotted.
No more popping, slop in the steering, and I can actually drive over 60 mph.
For the $22 it cost for the kit, I can't remember it driving this nice for so long.
__________________
eliteman76
1972 Torino GTS 351c 4v cj 4 speed
1973 Torino GTS-1979 F150 4x4
eliteman76 is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Ford Muscle Forums : Ford Muscle Cars Tech Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may 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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -7. The time now is 02:30 AM.



Powered by vBulletin® Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Friendly URLs by vBSEO 3.6.0
 

Garage Plus vBulletin Plugins by Drive Thru Online, Inc.