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Unread 12-22-2010, 07:41 PM   #1
fatkid1983
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BAD vibtation under load

Here's the scoop, 1982 cj7 sbc turbo 350 dana 300 stock front and rear. When I take the jeep for a cruise I get a alot of vibe on acceleration and on deacceleration but if I shift it into neutral it goes away. Any help please as it has stumped me.

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Unread 12-22-2010, 11:23 PM   #2
Trapshooter
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Have you checked you driveline u-joints?

Did this situation just start or has this been getting progressively worst over time?
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Unread 12-22-2010, 11:53 PM   #3
ASteve
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X2...that is the first thing I would check...Driveline U-Joints...

Any time I get that type of vibration it's always one of my U-Joints...

SC
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Unread 12-23-2010, 01:27 AM   #4
Cutlass327
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Seeing the SBC and such - did it just start? Are your angles and such ok? If it just started out of the blue, u-joints. If it has been there for a while, it may be a lift or something has messed up your drive line angles..
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Unread 12-24-2010, 01:57 AM   #5
fatkid1983
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Not sure if its a new prob, been doing since I bought it. Ill check ujoints thanks
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Unread 12-24-2010, 02:14 AM   #6
kakai81
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If changing the u-joints doesn't help, check your driveshaft angles.
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Unread 12-24-2010, 11:38 AM   #7
gojeepin
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I see that your profile lists it as SOA. Is your spring allowing axle wrap? That will put the driveline angle out of whack under load.
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Vibration? Bump steer? Wandering? Read: Steering, suspension, and driveline basics. An article on how it works and where to look for problems.

83 CJ7, 4.1L 6cyl (4.0L bored .030" over), 35" tires, T-5 transmission, Dana 300 TC, Trussed AMC 20.
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Unread 12-24-2010, 01:05 PM   #8
Ken4444
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I'm just not seeing any entries for 'vibtation' in the FSM. This is a new one!

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Unread 12-24-2010, 02:08 PM   #9
80cj
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Quote:
Originally Posted by Ken4444 View Post
I'm just not seeing any entries for 'vibtation' in the FSM. This is a new one!

vibration, vibtation, I think we all know what he means. I have a bad habit of clicking on the "submit reply" button before prof reading myself.
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Unread 12-24-2010, 03:27 PM   #10
fatkid1983
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Sorry about the incorrect spelling. We call that fat finger syndrome
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Unread 12-24-2010, 04:08 PM   #11
Ken4444
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Quote:
Originally Posted by fatkid1983 View Post
Sorry about the incorrect spelling. We call that fat finger syndrome
Just being funny My posts are full of typos.
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Unread 12-24-2010, 04:23 PM   #12
BESRK
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Maybe you could post some pics of the rear driveline anlges.. try to shoot the photos from the side so it shows how much angle is in the rear driveline.. both upper and lower part of shaft/yokes.. this would help to point out any obvious angularity problems.
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Unread 12-24-2010, 09:26 PM   #13
fatkid1983
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Not sure how to post pics yet ill try
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Unread 12-25-2010, 12:02 AM   #14
gojeepin
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Quote:
Originally Posted by fatkid1983 View Post
Here's the scoop, 1982 cj7 sbc turbo 350 dana 300 stock front and rear. When I take the jeep for a cruise I get a alot of vibe on acceleration and on deacceleration but if I shift it into neutral it goes away. Any help please as it has stumped me.
It sounds like axle wrap to me... tipping the pinion up then down.
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Vibration? Bump steer? Wandering? Read: Steering, suspension, and driveline basics. An article on how it works and where to look for problems.

83 CJ7, 4.1L 6cyl (4.0L bored .030" over), 35" tires, T-5 transmission, Dana 300 TC, Trussed AMC 20.
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Unread 12-25-2010, 01:02 AM   #15
fatkid1983
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How do I fix the axle wrap
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