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  #1  
Old October 12th, 2013, 10:01 AM
RickM
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Rick Mabus
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driveline questions

Hey everyone. Thanks in advance for ideas. I have a rhythmic vibration coming from what appears to be the rear end of my truck. I also noticed I have a tick/knock of some sort that ties with RPM's also in what appears to be the rear end. I climbed underneath to check the rear d-shaft, and by hand it does not have any play. I do have a leak from the plate on my t-case, and have not filled it in years. I also noticed my front drive shaft appears to have some play almost as it comes out of the t-case. Is that a bad internal t-case bearing? I plan to remove the rear drive shaft as well as fill the t-case and see if any noises or vibrations go away. Any other ideas.
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  #2  
Old October 12th, 2013, 10:11 AM
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Are the lug nuts tight
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  #3  
Old October 12th, 2013, 10:18 AM
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Is the vibration the same at all speeds or does it change as you speed up and slow down? In most instance if it is varying with speed, it's the u-joints. You won't be able to tell by wiggling if they are bad, but when you take them apart...what happens is the cups and spiders get "brinnelled" where the rollers hammer into the bearing races. They can feel tight but are useless.
If you are pulling the shaft you might as well do the u joints if they are suspect. I'd do the front shaft too just for grins. It's a pretty cheap fix job.
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  #4  
Old October 12th, 2013, 10:45 AM
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Although u-joints are more likely the culprit you should also check for driveshaft spline wear.
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Old October 12th, 2013, 03:46 PM
RickM
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I just did my front wheel bearings, and ordered some u joints from rovers north while I was at it so those will be on the way in tomorrow. I am planning on driving it around some by itself as is to see if the vibration/noise are still around. I will report back.as to what I find out.
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  #6  
Old October 13th, 2013, 07:31 AM
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Are all your tires the same size. Can cause a problem with full time 4 wheel drive if they are not.
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  #7  
Old October 13th, 2013, 07:51 AM
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Filling the T case might make it happy. But it is unlikely to solve the whine.
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  #8  
Old October 13th, 2013, 06:53 PM
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Rick Mabus
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Reese- The tires have some wear to them but they are all 285 75 16's.

So I did replace my u-joints. Great way to spend a dreary Sunday. I pulled the rear drive shaft and threw it in 4 wheel high diff lock. This is prior to filling the t-case. Took it for a spin and the frustrating noises were gone, but you would have thought someone had shoved a bucked of old screws in my tranny when the clutch was catching while getting rolling. Anyway, I got under the truck and noticed real quick that the screw that holds the parking break drum/rear drive shaft bolts on was way loose. Almost even all the way out. I tightened that up stuck the u-joints on and I think it is all drivable. Not so sure what noise I was hearing, but no question that loose drum and bolt had to be a bad thing.

I am excited to drive it and see if I actually fixed anything.
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  #9  
Old October 13th, 2013, 07:20 PM
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if your front output flange is moving in an out of the t case and the nut is super tight, you might have a bad output shaft bearing spacer, as well as the bearing.

I just did one like this and the spacer was split in two and worn down around the edges, no noise or any warning just the play in the flange. God knows where all the bits are as none in the oil on draining, and being aluminium hoping all the bits are filling in any holes.
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  #10  
Old October 13th, 2013, 10:24 PM
RickM
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Those pictures scare me. I did drive it and as of now, it is the most quite my truck has been in a while. I am a bit worried about that bolt coming loose again. Obviously the front of the drive shaft plate holts it in place but man that is a bit troubling.
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  #11  
Old October 14th, 2013, 08:55 PM
RickM
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I now have a new one. I went to check on an annoying clunk in the rear end that I know is probably the shock bushings around the tub. I fixed the shock bushing on the passenger side years ago, and this is the exact same noise. Anyway, I went to back off the nut and the darn thing may have either sheered off the threads on the bolt, or nut but right now, it is spinning in place. I am thinking I am going to simply need to remove the mount from the truck, but before I do so, I had a quick question. Is that bolt re-buildable, or am I done/call rovers north and get a new one coming?
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  #12  
Old October 14th, 2013, 09:20 PM
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A common occurance. Get a new one, but they were on every disco and later RRCs so no need to buy new. Will Tillary or the other rover dismantlers should have one for you or someone on this board.
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  #13  
Old October 14th, 2013, 09:37 PM
RickM
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OK. Thanks for the heads up.
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  #14  
Old October 15th, 2013, 07:22 AM
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Yes, Will Tillery (540) 462-7353 for parts

or Joel/crown14 (888)789-4296 for parts


I wouldnt worry about the loose screw securing the parking brake drum.
When your driveshaft is on, that drum isn't going anywhere.
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