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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

Door panels and misc issues

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Old Sep 1, 2014 | 01:39 AM
  #1  
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Door panels and misc issues

I was wondering if anyone had any tips on how to repair door panels that are pretty weathered. They're weathered to the point that I have holes. I don't know if there is some kind of plastic bondo that I can use.

Also, I have noticed that anything over 45mph my truck vibrates pretty bad. I'm thinking it's the drive shaft is bent or out of balance. It isn't the wheels as I can't feel it in the steering wheel.

The shift lever vibrates quite a bit when I get up to speed and it's either the transmission or drive shaft.

The reason I know it's not the engine is because I can rev the engine and not feel the vibration. I can get it up to 5500 rpm and it's smooth as butter.

Any thoughts?

Thanks.
 
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Old Sep 1, 2014 | 07:07 AM
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Auto body supply shops will have filler for plastic bumper fascia.
This will stick and flex but there's no way to duplicate the texture of the door panel.
Have you considered replacements?
Driveline vibration can have many causes.
Beyond worn or dry universal joints, it could be;
An oil saturated transmission mount.
Worn tailshaft bushing.
Bad splines.
Shaft itself bent or out of balance.
Yoke wallowed out so the U-joint is not tight.
 
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Old Sep 1, 2014 | 09:17 AM
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Jim is spot-on as always. But as the vibration is a recent issue I'd bet on a u-joint.

For the door panels, I've never seen one so bad as to have holes all the way through, so they must really be bad. I would go to a salvage and look for some as every panel I've ever seen was better than yours. And I live in an area that gets very high UV.
 
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Old Sep 1, 2014 | 10:16 PM
  #4  
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We're working on identifying the issue with the vibration.

Unfortunately the panels that have the holes in them are for the rear doors and finding panels for those are slim to none. I'll see about repairing them.
 
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Old Sep 2, 2014 | 01:58 AM
  #5  
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Originally Posted by lavatan
We're working on identifying the issue with the vibration.

Unfortunately the panels that have the holes in them are for the rear doors and finding panels for those are slim to none. I'll see about repairing them.
I've got a left rear door panel from my '83 that you can have for shipping but you'll have to fix the speaker holes that were hacked into it. I swapped a '92 rear door and the old panel don't fit.

 
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Old Sep 2, 2014 | 02:02 AM
  #6  
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Originally Posted by ArdWrknTrk
Auto body supply shops will have filler for plastic bumper fascia.
This will stick and flex but there's no way to duplicate the texture of the door panel.
Have you considered replacements?
Driveline vibration can have many causes.
Beyond worn or dry universal joints, it could be;
An oil saturated transmission mount.
Worn tailshaft bushing.
Bad splines.
Shaft itself bent or out of balance.
Yoke wallowed out so the U-joint is not tight.
I just went through this with my '83 crewcab dually. I had to replace all u-joints, the center carrier bearing, the center yoke/splines, and the rear yoke. Try unhooking the driveshaft at the differential and check the u-joint there. Then start working your way foward and check each component for wear and/or damage. It doesn't take very long.
 
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Old Sep 2, 2014 | 08:10 AM
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I've never dealt with the center support other than to take it down and put it back in again. I've never replaced it. How much "give" is it supposed to have? In other words, how can I tell that it's bad?
 
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Old Sep 2, 2014 | 08:16 AM
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Is the bearing crunchy or loose?
 
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Old Sep 2, 2014 | 08:22 AM
  #9  
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I'll have to look tonight when I get home. I'll let you know what I find.
 
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Old Sep 2, 2014 | 02:48 PM
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Also the center splines and slip yoke should be nice and smooth when sliding in and out. Binding is a bad sign. Look for cracks around the splines.
 
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Old Sep 2, 2014 | 03:41 PM
  #11  
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Correct me if I am wrong, but I don't think my drive shaft has splines except for maybe in the center carrier bearing. The connections to the transmission and the rear diff are both u-joints. I'll take a look at the u-joints and give them a couple pumps from the grease gun. I'll see if I can separate the shaft from the carrier as well.
 
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Old Sep 2, 2014 | 08:28 PM
  #12  
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I was looking at the drive shaft. The only splines are on the center carrier bearing. The carrier bearing is easily able to be moved up and down at least 1/4-1/2" without the mount moving. I'm trying to explain that it appears as though the rubber bushing is worn. I'm surprised it hasn't caused me more issues before now.

I'm going to remove the drive shaft tomorrow. Are there any special tools I might need in order to remove the carrier bearing?
 
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Old Sep 3, 2014 | 02:32 AM
  #13  
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Originally Posted by lavatan
I was looking at the drive shaft. The only splines are on the center carrier bearing. The carrier bearing is easily able to be moved up and down at least 1/4-1/2" without the mount moving. I'm trying to explain that it appears as though the rubber bushing is worn. I'm surprised it hasn't caused me more issues before now.

I'm going to remove the drive shaft tomorrow. Are there any special tools I might need in order to remove the carrier bearing?
I believe you need a 9/16 inch socket to get the two mounting bolts out. The rear section of the driveshaft should slip out easily once you've removed the two ujoint straps fron
from the rear pinion.
 
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Old Sep 3, 2014 | 08:13 AM
  #14  
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I'm sorry if I wasn't clear. What I meant was removing the carrier bearing from the driveshaft and not the truck.
 
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Old Sep 5, 2014 | 07:47 PM
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The carrier bearing is only held in with two bolts but you will have to remove the rear driveshaft section to get the bearing off the front section. If the rubber cushion is shot you might as well replace the entire assembly as it's cheap.
 
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