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Excursion - King of SUVs 2000 - 2005 Ford Excursion

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  #16  
Old 07-08-2009, 12:41 PM
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What about a bent rear axle housing? Mark the center of eack tire, then measure the distance between the marks. Move the vehicle rotating the tires 90 or 180 degrees and re-measure. See if there is a difference. Are your tires wearing normal?
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  #17  
Old 07-08-2009, 12:53 PM
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See if you can borrow a driveshaft somewhere. Tailhousing bushing could be bad . Ford had a problem with their short splined version of the pinion yoke wearing out. Move everything laterally to check for any wear.
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  #18  
Old 07-09-2009, 06:45 AM
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Well, here is another update. I went to the driveline shop. They specialize in heavy truck repair and driveshafts. Three of the employees came out and examined my Ex. This was the most help I have received so far locally. They said my angles are fine, front ujoint is worn (4 months old) and that visually everything looked fine. The shop foreman said my driveshaft was slightly crooked meaning there is not perfect alignment between the TC and pinion. I know the Ex has never been wrecked and the mounts look fine. The manager wanted to ride in the Ex. Luckily, the spot I had the driveshaft bolted in (on TC) made it have a heavy vibration starting at 55 mph and up. Constant. We got back to the shop and he went to the driveshaft guy and said "Price a CV joint". So that is where I am at. I have some ties and will get a price break (plus they retubed the shaft to begin with). This is just a next step in getting it tolerable for my tastes. When I got home, I reindexed the driveshaft back to where I started and only have the bad vibes when barely on the throttle. After this, not sure where to go. At some point I have to quit. As far as the pinion yoke, It looked fine when I put pinion bearings in it. I also read, I believe, the short pinion was in early Sterling axles.- Tires are wearing normal and tracks straight when driving. I really appreciate the input.
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Old 07-09-2009, 09:36 AM
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You have not put on the new CV joint or had the front u joint fixed yet? Even though a universal joint is only 4 months old does not mean it is good. I had one go bad pretty quick one time when I pressed the u-joint in, it damaged the bearings in one cup. Also be careful when greasing the u-joint try not to break the bearing seal, if you do it will allow dirt and grime to get in and cause a u-joint to go bad faster.
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  #20  
Old 07-09-2009, 09:43 AM
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I wouldn't waste my money on a CV joint. Go to the wrecking yard and get another shaft. CV joints have there own need and it doesn't match yours. I'm sure they will be glad to sell you one. (will they take it back though?)
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  #21  
Old 07-09-2009, 11:53 AM
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I tried the wrecking yard. They can find one and want $300 for it. A new Ford one is either $439 or $499. They cannot tell me the difference in the two. I have a complete factory driveshaft out of an F250 SC, but it is one inch longer- would love to give it a shot but am afraid to.
As far as mine not needing the CV, I am not necessarily sold either that it "needs" it. But, if it makes it more tolerable to drive, I am willing to try it. The fact that Ford put them on brand new Excursions tells me that they felt a need. I have read countless posts on the same issue I am having and specifically recall a post from deep in the archives (2003). Some guy responded to a vibration post claiming his 03 had the same vibration. The Ex had 2500 miles and had done it since new. I have also read countless posts where Ford changed transfer cases. complete rear axles, pinion bearings, driveshafts, played with pinion angle. I am literally out of ideas short of just changing parts. All I know is if I change driveshaft orientation, it gets better or worse. I have three weeks to fix it before I take it on vacation, so I am getting pretty antsy.
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  #22  
Old 07-09-2009, 12:00 PM
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Can you try that other shaft or just borrow 1 for a day?
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  #23  
Old 07-09-2009, 12:01 PM
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Quote:
Originally Posted by dave91gt View Post
The shop foreman said my driveshaft was slightly crooked meaning there is not perfect alignment between the TC and pinion.
Suggest you check this out. Out of alignment in what plane(s)? What is needed to correct the alignment?

4 mos of driving out of alignment could have ruined those u-joints or exacerbated an existing problem.
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  #24  
Old 07-09-2009, 12:35 PM
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According to the shop manager, the pinion is slightly to the right of center in relation to the TC when viewed from the back. Deep down, I am assuming I have another issue. My next bet is within the transfer case. I have a complete TC from an 05 6.0 (NV 273) and I was told the input shaft is different than a V10. I assume due to the Torqueshift transmission. The only reason I havent bought another case is that the vibes change when the driveshaft is bolted in differently. As far as sourcing another driveshaft, the local yards have no Excursions. I would have to buy it and have it shipped. Who knows what I would end up with.
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  #25  
Old 07-10-2009, 12:17 AM
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You might try using some stick-on tire weights or tape them on in certain places by trial and error and see if that helps. I know you said the shop balanced the driveshaft but it sounds like it is not balanced if you can rotate it and the vibration gets better. I would change the bad u-joint also.
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  #26  
Old 07-13-2009, 12:35 PM
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Well, at this point, my Excursion sounds like an Apache helicopter inside. I removed the tailshaft housing and replaced it with my original one. Also put my original yoke back on. I put a new ujoint on the TC side (Napa). The noise and vibes did not change. Originally, my vibration was worse when on and off of the gas. Now, it starts at 50 mph and stays there regardless of load. Quite annoying. My CV joint will be ordered and put in hopefully this week. Of course, the DS will be rebalanced. Will update as I go. I did put a protractor on my two yokes while I had the DS out. The TC was at 5 degrees and the pinion was at 7 degrees. Also, using a tape measure, the driveshaft is closer to the drivers side yoke by 1/8 of an inch.
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  #27  
Old 07-13-2009, 03:38 PM
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The last vehicle I had that sounded like a helicopter had a rear end going out. One night when I stepped heavy on the gas the ring gear had some teeth break off and it really sounded bad. I limped it home and had to find a new rear end. If it sounds like that then I would be looking at the rear end or a bad bearing. I went back and saw where you rebuilt the rear end. Have you checked the fluid level in it? Helecoptor sound just brought me back to the rear end.
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  #28  
Old 07-13-2009, 04:23 PM
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Yeah, fluid level is fine. I replaced both pinion bearings and the carrier bearings. Ring and pinion looked great and the rear axle is quiet. I can put my hand on the floor behind the drivers seat and feel the vibration.
I am aggravated.
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  #29  
Old 07-14-2009, 01:54 PM
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Quote:
Originally Posted by dave91gt View Post
The TC was at 5 degrees and the pinion was at 7 degrees.
AFAIK, 2 degrees is OK.

Quote:
Originally Posted by dave91gt View Post
Also, using a tape measure, the driveshaft is closer to the drivers side yoke by 1/8 of an inch.
Can you explain that differently?
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  #30  
Old 07-14-2009, 02:04 PM
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The nose of the yoke (facing the flange) on the drivers side is closer to the flange by 1/8 of an inch versus the same location on the passenger side. I measured from the 2 "ears" on the slip yoke to the flange. The vibration is now at all speeds above 50 and sometimes is so bad I can feel it in the steering wheel. I can modulate it slightly with the throttle. It is not a front wheel bearing (noise does not change side to side) and they are tight. Both front axle shafts are disconnecting also.
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Old 07-14-2009, 02:04 PM
 
 
 
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