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front end vibrations

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Offline SKAsammy

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  • 1991 samurai
front end vibrations
« on: February 28, 2008, 07:19:27 PM »
its a 91 sammy... the front end vibrates pretty hard, but only when im in 4wd i thought maybe it was the u joints and they needed to be replaced anyway so i did em but the vibration is still there and has gotten worse over the last 4 or 5 months, I dont know much about working on axles but am willing to learn if someone can help diagnose my problem. any help is appreciated, thanks in advance
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1991 SAMURAI
6"spoa
2" body  lift
8000 lb winch
30/9.5/15 BFG all terrains roll on bedliner in and out homemade bumper 1996 Silv. 4" lift 35's many mods
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Offline SKAsammy

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Re: front end vibrations
« Reply #1 on: February 29, 2008, 02:04:35 PM »
anyone??? ???
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1991 SAMURAI
6"spoa
2" body  lift
8000 lb winch
30/9.5/15 BFG all terrains roll on bedliner in and out homemade bumper 1996 Silv. 4" lift 35's many mods
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Offline ripsnort

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Re: front end vibrations
« Reply #2 on: February 29, 2008, 03:21:36 PM »
Check to see if your front drive shaft is balanced.  I may be bent as well.... I have a rock crawler that has a home made front shaft and it is miserable at anything above than 10-15 mph.  Hope this helps.
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Offline Drone637

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Re: front end vibrations
« Reply #3 on: February 29, 2008, 05:30:54 PM »
It sounds like a front drive line issue, like ripsnort mentioned.  A good way to test would be to pull your front drive line, then drive around with your hubs locked in.
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96 Geo Tracker, x-SJ-410,  x-White Rabbit, x-Project Trouble
Crawlers NorthWest
x-Trouble Racing
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Offline ack

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Re: front end vibrations
« Reply #4 on: February 29, 2008, 06:46:31 PM »
Take a look at this video at Ack's FAQ:

http://www.acksfaq.com/driveshaftvideo.php

Care to guess why I made this video???
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Ack

'88 Samurai, '88.5 Samurai TT, '11 Ford Transit Connect XLT
Ack's FAQ  http://www.acksfaq.com
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Offline Drone637

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Re: front end vibrations
« Reply #5 on: February 29, 2008, 07:27:39 PM »
You know, I had been wheeling for years before anyone mentioned that you had to do that to your drive lines.  Guess I never went fast enough for it to matter.  :D
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96 Geo Tracker, x-SJ-410,  x-White Rabbit, x-Project Trouble
Crawlers NorthWest
x-Trouble Racing
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Offline Cuthulu

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Re: front end vibrations
« Reply #6 on: February 29, 2008, 09:57:52 PM »
Quote from: ack on February 29, 2008, 06:46:31 PM
Take a look at this video at Ack's FAQ:

http://www.acksfaq.com/driveshaftvideo.php

Care to guess why I made this video???


If I ever meet you in person I am so going to buy you some drinks.
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Offline SKAsammy

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  • 1991 samurai
Re: front end vibrations
« Reply #7 on: March 03, 2008, 02:08:04 PM »
sorry, i forgot to mention i already checked my d shaft and it is aligned i also replaced my d shaft with another used one in case it was bent but it still has the vibration.  If i take it off and ltry to drive it in 4wd will anything get screwed up?
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1991 SAMURAI
6"spoa
2" body  lift
8000 lb winch
30/9.5/15 BFG all terrains roll on bedliner in and out homemade bumper 1996 Silv. 4" lift 35's many mods
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Offline Drone637

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Re: front end vibrations
« Reply #8 on: March 03, 2008, 07:03:25 PM »
Nope.  In reality though, you don't have to drive in 4wd, just have your front hubs locked in.  This will allow the parts in your front end to rotate freely.  Of course, this test only works if you have manual hubs... should have mentioned that. 

I was picking up some vibrations, it ended up being a problem in the diff.  With the drive line disconnected I rotated the diff by hand and could feel it binding up.  A quick tear apart and reassembly fixed the problem.
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96 Geo Tracker, x-SJ-410,  x-White Rabbit, x-Project Trouble
Crawlers NorthWest
x-Trouble Racing
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Offline SKAsammy

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  • Gender: Male
  • 1991 samurai
Re: front end vibrations
« Reply #9 on: March 04, 2008, 05:26:41 PM »
cool thanks, ill try it this weekend and let you know what happens
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1991 SAMURAI
6"spoa
2" body  lift
8000 lb winch
30/9.5/15 BFG all terrains roll on bedliner in and out homemade bumper 1996 Silv. 4" lift 35's many mods
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