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Old 03-26-2012, 08:08 AM   #1
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Driveshaft Bend?

Hi,

I go to this regular guy who does most of the jobs on my TJ. He was telling me during the next service, he would remove the drive shaft and check for any bends. Is this possible? If so, wht could be the reason for it? Any permanent fix?

Thnx..

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Old 03-26-2012, 09:09 AM   #2
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It might be out of balance, but bent? probably not. You would more than likely break a u-joint before you bent the short TJ driveshaft.

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Old 03-26-2012, 10:29 AM   #3
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I think if your drive shaft was bent you would know it. It would vibrate some bad while driving, even if it was unbalanced you would probably feel it...
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Old 03-26-2012, 12:28 PM   #4
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Quote:
Originally Posted by Badass_TJ View Post
I think if your drive shaft was bent you would know it. It would vibrate some bad while driving, even if it was unbalanced you would probably feel it...
That's what I was thinking too...if it was bent, I'd think you'd rattle most of your teeth out on the ride home...
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Old 03-28-2012, 01:23 AM   #5
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Now that you guys point out vibration, well there is a small vibration when i do accelerate and dies down with the speed increase. This happens when i am doing say 60 to 70 kmph. Also, i have installed a 2.5" Lift kit. does the vibration has anything to do with it?
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Old 03-28-2012, 02:08 AM   #6
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Originally Posted by Capt TJ View Post
Now that you guys point out vibration, well there is a small vibration when i do accelerate and dies down with the speed increase. This happens when i am doing say 60 to 70 kmph. Also, i have installed a 2.5" Lift kit. does the vibration has anything to do with it?
I have a similar problem. When I accelerate it vibrates and when I let off it goes away. I have a 3.5 procomp lift.
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Old 03-28-2012, 07:33 AM   #7
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The lift probably causes it. Lot of people dont have problems with a 2.5" lift, I did. Inspecting your driveshaft is not going to fix it, thats a way for him to collect more cash. 3 ways to get rid of the vibration.

1. cheapest but contradicts the point of a lift is dropping the t-case skid.

2. Medium price option is a motor mount lift. Can be done without a body lift by moving the fan shroud up 1"

3. The common "right" way to fix it along with the most expensive, a SYE (Slip Yoke Eliminator) and Double Cardan (cv type) driveshaft. Runs around 500 plus you need adjustable upper rear control arms. Total if you do the work yourself runs from 700-1000 with quality parts.



On the 2.5 lift, I would do a Motor Mount Lift and move the shroud up 1". On the 3.5 lift, you might could get by with a MML, but I would suggest a SYE and CV shaft.

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