Factory Traction bars
Thread Starter
|
4wd High
Joined: Apr 2006
Posts: 9
Likes: 0
From: Orlando,FL
Factory Traction bars
I bought a used 04 Ex EB V10 4x4 and have been fighting a vibration at speed (65+). New goodyear wranglers cured 85% of the vibe but it still shakes. After some searching it looks like it might be either pinion angle or the drive shaft. I removed the rear drive shaft and went for a ride in 4hi. Smooth as can be, no vibration at all. This is where I noticed my traction bars don't sit at the same position when parked. Passenger side bump stop is against the spring, the driver’s side is not. I can fit a finger between the stop and the spring on the driver’s side. Where do the stops sit normally? Touching or not touching? Any ideas why they would be different?
The truck is not lifted and is my wife’s DD.
The truck is not lifted and is my wife’s DD.
Senior User
Joined: Jun 2005
Posts: 208
Likes: 0
From: San Francisco Bay Area
The bump stops are just a half a finger clear of the springs on an '05 diesel.
Should be the same.
Was the alignment and previous tire wear okay?
Good idea to remove the rear prop shaft. I guess that proves the center diff is locked in 4WD-High?
Off road the X doesn't even feel like it has a center diff lock because if it spins one wheel, it stops. It seems to me, that doesn't quite add up.
Anyway, for your situation, it certainly looks like something is broken or has failed in the rear. On level ground, is everything the same height off the ground?
Should be the same.
Was the alignment and previous tire wear okay?
Good idea to remove the rear prop shaft. I guess that proves the center diff is locked in 4WD-High?
Off road the X doesn't even feel like it has a center diff lock because if it spins one wheel, it stops. It seems to me, that doesn't quite add up.
Anyway, for your situation, it certainly looks like something is broken or has failed in the rear. On level ground, is everything the same height off the ground?
Thread Starter
|
4wd High
Joined: Apr 2006
Posts: 9
Likes: 0
From: Orlando,FL
Originally Posted by ymmv
Was the alignment and previous tire wear okay?
Good idea to remove the rear prop shaft. I guess that proves the center diff is locked in 4WD-High?
On level ground, is everything the same height off the ground?
Good idea to remove the rear prop shaft. I guess that proves the center diff is locked in 4WD-High?
On level ground, is everything the same height off the ground?
I removed the rear shaft to try and find this high speed vibration. I had heard tell of pinion angle problems even on stock suspensions. After the smooth ride with no rear shaft I thought it had to be either out of balance drive shaft or pinion problem but now I'm not so sure.
I will compare measurements and see if anything jumps out as being bent or broken. Thanks again for your help.
Senior User
Joined: Jun 2005
Posts: 208
Likes: 0
From: San Francisco Bay Area
I'm not really helping much just yet. I have heard drive-line vibration (and experienced it in one demo Excursion in '04.) I read somewhere on another forum of a guy that had his factory prop shafts rebalanced and they were apparently not great before and cured the problem of "thrumming" (vibe on acceleration but not when coasting.) My '05 X PS has thrumming at 80mph. The dealer service manager said, "SO?!"
I'm about to do a Donahoe 5" lift and will have the shafts rebalanced if dropping the carrier isn't enough. So it goes. After all, this is a 30 year old design using 50 year old machinery in a truck that's got an SUV cabin fit-out ... what can you expect ... BMW 5 Series NVH? No.
I'm about to do a Donahoe 5" lift and will have the shafts rebalanced if dropping the carrier isn't enough. So it goes. After all, this is a 30 year old design using 50 year old machinery in a truck that's got an SUV cabin fit-out ... what can you expect ... BMW 5 Series NVH? No.
Thread
Thread Starter
Forum
Replies
Last Post
cowboybootlegger
1999 - 2003 7.3L Power Stroke Diesel
18
Sep 3, 2015 08:39 PM
'94IDITurbo7.3
Pre-Power Stroke Diesel (7.3L IDI & 6.9L)
12
Feb 11, 2013 05:08 PM
HeavyAssault
1999 - 2016 Super Duty
7
Sep 28, 2009 09:58 AM
Pickupman2004
1999 - 2016 Super Duty
15
Mar 5, 2008 09:57 AM
