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Old 11-21-2008, 04:01 PM
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bashbro1 bashbro1 is offline
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A question about lifts and Driveshaft Angles

I recently purchased a 6" hellcreek suspension kit used from a member of this board. The kit is brand new and I see it had the wedges on the rear leaf springs to correct the pinion angles.

My vehicle is a 1984 Grand Wagoneer with the 360.

My mechanic swears though that I will need to either lengthen the driveshafts or drop the transfer case to prevent the drivetrain from damage.

Is there any truth or need for these changes. I have done a few searches and it seems that most everyone agrees that a driveshaft extension isn't neccessary. But has anyone heard of dropping the T-Case a little to compensate for the lift?

thanks

Lucas
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Old 11-21-2008, 04:16 PM
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Dmntxn77 Dmntxn77 is offline
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Dropping the TC is something that baby Jeep lift kits often come with. You wont need it on your FSJ...

Regarding driveline length, you should be fine. It is sometimes hit or miss especially on the front. Generally though, for up to a 6" lift you will be fine. However, at full flex, you could be real close.

Just put it all on, and flex it out in the driveway to make sure you are good before you hit the trails..



Also, my advise would be to install the lift yourself. These suspesions are VERY simple to work with. If tools is your issue, just take the money that you were to going to pay the mechanic down to harbor freight, and buy the tools. You will be a lot happier once its done if you install it yourself. Plus, when something brakes later on the trail, you wont be lost trying to figure it out...

Last edited by Dmntxn77 : 11-21-2008 at 04:20 PM.
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Old 11-21-2008, 11:16 PM
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Rich88 Rich88 is offline
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Several years ago I installed 4" lift blocks in the rear. I did notice that the wear mark where the driveshaft spline slips in was "out" somewhat indicating that the lift had the effect of pulling back on the driveshaft. No big deal.

Just how critical was demonstrated during the test drive I made after installing the lift. I had to make an emergency lock-'em-up stop, and next thing I knew, the driveshaft was sitting on the pavement.

Answer is: measure the distance between the old wear marks and the new position on the front driveshaft spline and have the driveshaft lengthened that much.
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Old 11-22-2008, 12:07 AM
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I just installed a Rustys 6"lift on my '86 Grand Waggy. Did it in my garage with basic tools. Only borrowed pitman arm puller. Both front and rear drivelines are good. I get tiny vibration from rear about 30 mph then gone. Drives good.Also installed BJs shackle lift so doesnt rake to rear. NO issues with front or rear driveshafts.
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Old 11-22-2008, 11:30 AM
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My biggest issue with putting 6" kits on is the rear ebrake cables being to short on some years. Otherwise you should be good to go.
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Old 11-23-2008, 03:27 PM
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I put a 6" BJ's lift on mine and had no problems with the stock shafts.
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Old 11-24-2008, 09:20 AM
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Thanks for the input. I will give it a shot. I did intend on installing it myself. My mechanic said we could use his lift after hours for the price of a case of beer.
You have to love small town economics

thanks
Lucas
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Old 11-24-2008, 11:30 AM
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I had to lengthen my rear shaft.
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10$ NP229 fix http://www.ifsja.org/forums/vb/showthread.php?t=2520
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