Drive shaft angles - Off-Road Forums & Discussion Groups
Jeep-Short Wheelbase All discussion of short wheelbase Jeeps: CJ, TJ, YJ and JK

 
LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 12-28-2000, 07:23 PM
Reaver
Guest
 
Posts: n/a
Drive shaft angles

What is the maximum amount of suspension lift you can get away with on a CJ7 without adversely affecting the drive shaft.

Cheers.

Nick.

Hey, I`m new to this.
Sponsored Links
Advertisement
 
post #2 of (permalink) Old 12-28-2000, 07:36 PM
**DONOTDELETE**
Guest
 
Posts: n/a
Re: Drive shaft angles

Don't know for sure but every YJ lift add I've seen for 4" suggests transfer case modifications. You should be fine with about 3" of lift and 1" spacers between the trans case cross member and frame rails. Just a guess but the CJ7 and YJ are about the same size.

'88 Sahara
post #3 of (permalink) Old 12-28-2000, 08:09 PM
 
Join Date: Mar 2000
Posts: 611
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: Drive shaft angles

Well, what do you mean by adversly? If you mean no discernable difference over the stock setup then I wouldn't go more than 2.5 inches suspension lift. I have a 4 inch SUA lift, with a transfer case drop (1") and I have a vibration. Other than being a little annoying it hasn't caused any other problems. I did have to replace ujoints, which was probably attributable to messed up angles, but i don't know that for sure and they are cheap, so WTH. I've run my jeep for a year like this, but being trail rig and weekend driver that's only about six thousand miles. I will be eliminating the Tcase drop and going with CV shaft next month.

Max

dealing with your Jeep obsession;
the steps - recognition
denial
acceptance?
uhh...screw it, lets go wheelin'
CJ money pit is offline  
Sponsored Links
Advertisement
 
post #4 of (permalink) Old 12-28-2000, 08:37 PM
Keyboard Implanted
 
pontiac58's Avatar
 
Join Date: Jul 2000
Location: southern new jersey
Posts: 2,818
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: Drive shaft angles

With the 4in super lift kit and not dropping the tcase. I have no problems at all. No vibes and i havent broke a u-joint, but i am anal about greasing them after ever ride. If i dont wheel then once a month. The superlift kit came with shims for the back so that helps. The longer shackles also help by tilting the pinions up. I drive mine 6 days a week and wheel at least once a month.

80 cj7, 304, auto, 33" tsl swampers, 4" softride superlift
pontiac58 is offline  
post #5 of (permalink) Old 12-28-2000, 10:09 PM
 
Join Date: Sep 1999
Posts: 1,286
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: Drive shaft angles

After about 2.5" you'll need to lengthen the shaft.

As long as the angle of the t-case output shaft and the angle of the pinion are the same (or within a degree or so) there should be no vibration problems. But the more you increase the angles by lifting, the faster the u-joints wear out.
15 degrees is the manufactures suggested max, after that a cv joint is a good idea. I ran a shaft at 23 degrees for a few years and replaced u-joints about every 6 months, also needed to grind the yokes for clearance.

Wayne in Hawaii
77CJ5 "PYRO II" Web page
http://www.members.tripod.com/surfmac/Index.html
W.C. is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Off-Road Forums & Discussion Groups forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome