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Unread 10-08-2003, 09:33 PM   #1
edge1
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Join Date: Jun 2003
Posts: 68
shifter vibration

My 86 CJ7 (4 sp manual) has just developed a severe vibration in the two shifters in third gear only, about mid way through the rpms. It is not happening in any other gear or at hwy speeds. I put on a new set of OME springs with about 2" of lift several weeks ago (things had been ok until now). What could be the problem?


Last edited by edge1; 10-08-2003 at 09:38 PM..
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Unread 10-09-2003, 06:13 AM   #2
jadams68
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1984 CJ7 
 
Join Date: Aug 2002
Location: Downingtown, PA
Posts: 2,898
Problem may be that when you lifted the jeep, you threw off your pinion angle enough to produce driveline vibrations.

However, I'd check the following first.

a) Transmission mount is failing or broken.
b) Motor mount(s) need replaced.

You could drop the transfer case about 1/2" with a t-case lowering kit.
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Unread 10-09-2003, 08:21 AM   #3
edge1
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The engine and tranny mounts are both new (along with my rebuilt engine). From what I have been told, the angle should not be a problem until you get close to 3" of lift. It's worth a shot, though.
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Unread 10-09-2003, 08:31 AM   #4
jadams68
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1984 CJ7 
 
Join Date: Aug 2002
Location: Downingtown, PA
Posts: 2,898
Take it to the shop that did the work and ask them to measure your pinion angle on the rear pumpkin. It'll take 5 minutes and then you'll know definitively if that's your issue.
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