Drive shaft angle - JeepForum.com

 
LinkBack Thread Tools
post #1 of 8 Old 03-06-2012, 04:40 PM Thread Starter
buggycj7
Registered User
 
Join Date: Feb 2011
Location: naples
Posts: 2
Drive shaft angle

So I keep busting universal joint clips which in turn means my axle falls loose on my lifted cj7 front drive shaft. Anyone know what the 'most' acceptable angle is for my front drive shaft? I have a Dana 300 using 13-10 u-joints. I'm looking into putting a 'u joint knuckle' in to see if it fixes the problem but would like to know if dropping my Dana 300 is necessary?!

buggycj7 is offline  
Sponsored Links
Advertisement
 
post #2 of 8 Old 03-06-2012, 04:59 PM
ASteve
Registered User
1972 CJ5 
 
Join Date: Oct 2009
Location: Nor-Cal
Posts: 1,616
Go through the CJ section here:

http://www.4xshaft.com/

Also, some photos would help a lot to see just how steep your drive line is and your pinion angle etc...

SC
ASteve is offline  
post #3 of 8 Old 03-06-2012, 05:02 PM
79indcj7
Registered User
1979 CJ7 
 
Join Date: Mar 2011
Location: INDY
Posts: 69
How much lift? Does it have a transfer case drop? Pinion angles vary from front to back. I want to say a decent pinion angle is about 15 degrees give or take a few from that. Front axles are different you cant push up your pinion real high because it will affect your caster (death wobble and darting)
79indcj7 is offline  
post #4 of 8 Old 03-06-2012, 05:25 PM
nshefbuch
Registered User
1982 CJ7 
 
Join Date: May 2009
Location: piqua
Posts: 1,928
15 degree is max on a conventional u joint and binding will occur. This being said, at rest you will want about 7 degrees allowing for more angle when suspension flexes. The knuckle you mentioned is a cv joint which many cj7's have from the factory.

CJ7/SOA YJ leaf/5.3LS/t18a/d300 clock/37"Pitbull Rockers/H1's/14 bolt/d44 ARB 4.10 High Steer
nshefbuch is offline  
post #5 of 8 Old 03-06-2012, 05:28 PM
RobsCrawlin7
no balls
 
RobsCrawlin7's Avatar
2001 TJ Wrangler 
 
Join Date: Feb 2005
Location: Triangle
Posts: 3,257
please fill out your jeep info

'01 TJ 4.7/NV3550, 2" lift, 35's, locked.
'79 CJ7 stock, 304
'98 XJ sold
'79 CJ7 sold
'82 CJ7 parted
'89 MJ sold

SSG David Mejias, SSG Eric Vick, SGT William Bowling, SGT Robert McDowell
1 April 2007
Rest In Peace Brothers
RobsCrawlin7 is offline  
post #6 of 8 Old 03-06-2012, 05:52 PM
BagusJeep
Registered User
1981 CJ7 
 
Join Date: Jul 2009
Location: Bali
Posts: 5,281
As it is your front prop that is giving trouble it would not be an improvement to drop the Dana 300 as such. You can turn it and "clock" it but this will cause other issues and reduce clearances.

It is not clear which CJ you have as you have not filled in your profile but I assume it is an early 80s CJ7. The front shaft is, depending on gearbox, around 3-4" LONGER than the rear shaft. It is more common to have problems with the rear shaft when you lift the suspension as the angles will be acuter in the back.

If it was a CJ5 this would be an even truer observation.

So, why are you having problems with the front and not the back? Most users have their CJs in 4WD for only short periods and the shaft should be at rest. Are you only using it off road or are you using it in 4WD on tarmac?

When you say the clip fails do you mean the securing bolts that hold the bearing caps on to the shaft?

If it is your joints breaking or wearing out what grease are you using and howw pumped are they with grease? What brand of joints are you using? Spicer are reckoned to be superior.

I am just surprised you do not have these problems at the rear.

If you want to find out more about angles look up Tom Woods website.

BagusJeep lives in Bali.

1981 CJ7 258ci - Bagusjeep
1984 CJ7 258ci - Puthijeep
1981 J20 258ci - Gladys
1951 Willys CJ3A/MB/M38 - Little Willy
1995 Cherokee 4.0 - CHEROKEE
BagusJeep is offline  
post #7 of 8 Old 03-07-2012, 07:12 AM
CSP
Registered User
 
Join Date: Aug 2002
Location: Colorado
Posts: 15,506
Angles don't really come into play in the front shaft as it's not usually spinning fast enough to cause a vibration.

If the angle was really the problem you would be breaking ujoints instead of clips. Sounds like there are other things at play like possibly a damaged or worn out yoke.

At which end of the shaft are the clips breaking, axle or tcase?
CSP is offline  
post #8 of 8 Old 03-07-2012, 10:15 AM
80cj
Web Wheeler
 
80cj's Avatar
1980 CJ5 
 
Join Date: May 2002
Location: Hawaii
Posts: 6,270
Another thing that may come into play is if you have a lift that is extending the shaft too far. Going over bumps would tend to extend the shaft beyond it's intended length.
80cj is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com 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 e-mail address for yourself.



Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may 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 Off
Pingbacks are On
Refbacks are On

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