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  #1  
Old November 5th, 2007, 09:15 PM
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Mike
'97 Defender 90 SW
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I know, not another vibration question

But the search function isn't working currently or I am putting in the wrong search topics. I recently had a rear u joint go bad and when replacing it I found my driveshaft was out of true. I got a refurbed DS from great Basin Rovers and the D is back on the road. But this whole process got me thinking, why did the u joint go bad? There is some mild vibration in the drivetrain but it is improvd withthe new DS and u joints. But in an attempt to get rid of as much vibs as possible I pulled each DS separately and drove with one DS gone. The front is smooth as butter (as smooth as a D90 can be) and the vibs are coming from the rear. So I have an OME suspensionwith about 2" lift and 35" tires. Otherwise nothing extreme. I assume my pinion angle is off somewhat leading to this vibration. What is my next step, aftermarket trailing arms (rear links) and from who? Rovertym, Equip, SG, or Rockware? Or do I need a doublecardon DS? I would rather trailing arms for added articulation if possible. But this D90 is a learning experience for me allaround.

OK defender gods, what do you think?

Follow-up Post:

So the search worked but this can be an extension of the thread "Rear Links" by rover4X4. I measured my rear pinion angle w/c looks to be about 5-6 deg. Is that possible? Would rear links correct this?
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  #2  
Old November 5th, 2007, 11:26 PM
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Mark M
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Mike - Hope all is well with you and yours. Give Angus some rubs for me. My recommendation would be to purchase from Rovertracks cranked rear trailing arms (beef, clearance, and corrected angle) as well as getting your refurbed rear drive shaft balanced. GB makes good stuff, but I know another Mike who had vibrations and needed the shaft balanced - so it's not unheard of. Around here I think it's about $35. I had an odd vibration at highway speeds right after letting off the accelerator. It went away with the cranked rear arms. HTH. Mark
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  #3  
Old November 5th, 2007, 11:52 PM
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Andrew Najarian
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Mark, what is the advantage over Rockware's trailing arms which are $65 cheaper? I guess you could sell your orig. to recover some of the difference but I am just curious what you like better about them. Neither site has good pics of them so it is hard for me to compare them.
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  #4  
Old November 6th, 2007, 06:15 PM
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Mike
'97 Defender 90 SW
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Will do Mark.

I had the same vib when I let of the gas. It went away with the new u jts and DS. I had it for 3 yrs and just dealt with it.

Now just a mild continuous vib but it makes the buton on my shift knob rattle. Drives me nuts.

I'll balance the DS as you recommend and will most likely go with the trailing arms.

thanks
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  #5  
Old November 6th, 2007, 07:01 PM
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Phillip
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THey seemed to help mine but I still have pretty bad vibes.
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  #6  
Old November 6th, 2007, 09:37 PM
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Mark M
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Andrew - I don't think you can go wrong with either. I have Rovertrack arms and a boat load of Rockware products on my truck. Both vendors make great products, certainly a vast improvement over stock with regard to the arms. I know with Keith's you get new axle bushings. I don't know about the bushings from RW.

Mike - Be happy you have it narrowed down to the driveshaft. A buddy with his DII has been chasing a vibration for some time checking DS and the like. On Sunday he came over and we put my DII wheels and tires on his truck. Come to find out he has a bent wheel(s). Having them balanced repeatedly didn't help. Unfortunately, this was the first component he ruled out after having them balanced and went through the rest of the truck before coming back to them.

HTH. Mark
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  #7  
Old November 6th, 2007, 09:57 PM
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steve
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Quote:
Originally Posted by Oxcart13
On Sunday he came over and we put my DII wheels and tires on his truck. Come to find out he has a bent wheel(s). Having them balanced repeatedly didn't help. Unfortunately, this was the first component he ruled out after having them balanced and went through the rest of the truck before coming back to them.

HTH. Mark

Interesting. Balancing didn't detect a bent rim eh....is the only way to really know to take the tire off and spin the wheel?
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  #8  
Old November 6th, 2007, 10:04 PM
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Andrew Najarian
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Quote:
Originally Posted by D90user
Interesting. Balancing didn't detect a bent rim eh....is the only way to really know to take the tire off and spin the wheel?
It certainly should have been detected unless whoever was doing it was not watching. Those guys do so many and are so used to it I am sure its easy for them to pop em on the machine and turn around to look at the scenery (read: female customers) and not look at them till the machine beeps and tells them the weight that is needed.
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