Driveshaft angles ? - JKowners.com : Jeep Wrangler JK Forum
 
LinkBack Thread Tools Display Modes
post #1 of 12 Old 01-31-2012, 01:02 PM Thread Starter
Granite Guru
 
cajun01's Avatar
 
Join Date: Mar 2011
Location: Prairieville,Louisiana
Age: 43
Posts: 124
Feedback: 0 reviews
Driveshaft angles ?

I have a stupid question. I will be installing my double cardigan drive shafts front and rear. My pinion angle should be at zero in front and rear at the differentials correct. By zero I mean taking into account the pinion angle and slope of the drive shaft.

Rock Krawler 3.5
8 RK flex arms
Front and Rear RK Trac bars
Tera flex 2.5 bump stops
Procomp 17x9
315/70/17 Duratracs
Bilstein 5100s
XRC 10 winch
Homemade front and rear bumpers
jks disconnects

Last edited by cajun01; 01-31-2012 at 01:06 PM.
cajun01 is offline  
Sponsored Links
Advertisement
 
post #2 of 12 Old 01-31-2012, 01:44 PM
Granite Guru
 
Join Date: Nov 2009
Location: Colorado
Posts: 460
Feedback: 0 reviews

The rear pinion should be pointed up at the tcase output, in-line with the driveshaft. Up front, you have to tilt the pinion down a bit so you have enough caster to make it driveable. There is no correct angle that will work for everyone, but I would go for better driveline angles and low caster (which will give a bit of flighty handling) over more caster (better handling) and vibes. You may need to adjust it a few times to see what works for you.
GreenJK is offline  
post #3 of 12 Old 01-31-2012, 01:49 PM
Wheeler
 
bdeanjr86's Avatar
 
Join Date: Dec 2011
Location: Texas for now...MAINE is HOME
Posts: 10
Feedback: 0 reviews

Sounds like the same advice WayOfLife was trying to give you?!
bdeanjr86 is offline  
Sponsored Links
Advertisement
 
post #4 of 12 Old 01-31-2012, 01:50 PM
Gunnery Sergeant USMC (ret)
 
Uncle Sams Misguided Child's Avatar
 
Join Date: Dec 2010
Location: Tucson AZ
Age: 52
Posts: 22,000
Feedback: 8 reviews

Wow really? OP can you have a Mod move this over to Chit Chat? Please there are a few things I would like to respond too but this is in tech.

Quote:
Originally Posted by lohchief View Post
If people don't take a stand now,you'll be bitches under their thumbs tomorrow.
Quote:
Originally Posted by StubEXrube View Post
I think too much of a pressure variant between Earth and outer-space... lack of oxygen... something like that.

Last edited by Uncle Sams Misguided Child; 01-31-2012 at 02:03 PM.
Uncle Sams Misguided Child is offline  
post #5 of 12 Old 01-31-2012, 02:11 PM Thread Starter
Granite Guru
 
cajun01's Avatar
 
Join Date: Mar 2011
Location: Prairieville,Louisiana
Age: 43
Posts: 124
Feedback: 0 reviews

Greenjk, Thanks thats what I was thinking.

bdean, I couldn't quite understand what he was trying to tell me and it was starting to feel like a pissing contest.

Misguided, First thanks for your service, truly. Second let me know how to move this thread and I'll make it happen for you

Rock Krawler 3.5
8 RK flex arms
Front and Rear RK Trac bars
Tera flex 2.5 bump stops
Procomp 17x9
315/70/17 Duratracs
Bilstein 5100s
XRC 10 winch
Homemade front and rear bumpers
jks disconnects
cajun01 is offline  
post #6 of 12 Old 01-31-2012, 02:18 PM
JKO Addict!
 
SoK66's Avatar
 
Join Date: May 2009
Location: Four Corners
Posts: 4,128
Feedback: 2 reviews

Your rear angle should be about 1 - 2 degrees less at the pinion than the shaft. This allows for torque influence on the differential during acceleration. That is, the pinion nose will lift a it under acceleration, so you compensate at rest 1 to 2 degrees.

In front there is a 6 degree offset between the pinion and caster angles. SO, if you have 4 degrees caster, you have two degrees pinion angle, 3 caster = 3 pinion, etc. It's ok up to about 3" lift, after which it's an utter fools errand trying to get it sorted. Requires either a compensated housing like the Dynatrac PR44 or manual hubs.
SoK66 is offline  
post #7 of 12 Old 01-31-2012, 02:18 PM
Wheeler
 
bdeanjr86's Avatar
 
Join Date: Dec 2011
Location: Texas for now...MAINE is HOME
Posts: 10
Feedback: 0 reviews

Quote:
Originally Posted by cajun01 View Post
Greenjk, Thanks thats what I was thinking.

bdean, I couldn't quite understand what he was trying to tell me and it was starting to feel like a pissing contest.

Misguided, First thanks for your service, truly. Second let me know how to move this thread and I'll make it happen for you


Roger that, I can see where you would've gotten that from reading his posts!
bdeanjr86 is offline  
post #8 of 12 Old 01-31-2012, 02:27 PM
V8 dreams
 
jvandy50's Avatar
 
Join Date: Sep 2010
Location: jonesboro, ar
Posts: 3,553
Feedback: 0 reviews

So does everybody over 4in lift with aftermarket shafts just have flighty steering?


Vandy


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
2010 Silver JKU
jvandy50 is offline  
post #9 of 12 Old 01-31-2012, 02:34 PM Thread Starter
Granite Guru
 
cajun01's Avatar
 
Join Date: Mar 2011
Location: Prairieville,Louisiana
Age: 43
Posts: 124
Feedback: 0 reviews

Good info.
I have read that the rear pinion will rotate up 1 degree under load. Also the front pinion will rotate down under load. I was a little confused because some people say to set it at zero.
I will be running the RK 3.5. My plan is to set the rear pinion at or very near 0 degrees.
Then set the front pinion at 3 degrees that should give me 3 degrees camber, then adjust it by putting miles on it and feeling for vibes.

Rock Krawler 3.5
8 RK flex arms
Front and Rear RK Trac bars
Tera flex 2.5 bump stops
Procomp 17x9
315/70/17 Duratracs
Bilstein 5100s
XRC 10 winch
Homemade front and rear bumpers
jks disconnects
cajun01 is offline  
post #10 of 12 Old 01-31-2012, 02:52 PM
Gunnery Sergeant USMC (ret)
 
Uncle Sams Misguided Child's Avatar
 
Join Date: Dec 2010
Location: Tucson AZ
Age: 52
Posts: 22,000
Feedback: 8 reviews

Quote:
Originally Posted by cajun01 View Post
Greenjk, Thanks thats what I was thinking.

bdean, I couldn't quite understand what he was trying to tell me and it was starting to feel like a pissing contest.

Misguided, First thanks for your service, truly. Second let me know how to move this thread and I'll make it happen for you
thanks but it can stay here.

Quote:
Originally Posted by lohchief View Post
If people don't take a stand now,you'll be bitches under their thumbs tomorrow.
Quote:
Originally Posted by StubEXrube View Post
I think too much of a pressure variant between Earth and outer-space... lack of oxygen... something like that.
Uncle Sams Misguided Child is offline  
post #11 of 12 Old 01-31-2012, 04:17 PM
Granite Guru
 
Join Date: Nov 2009
Location: Colorado
Posts: 460
Feedback: 0 reviews

Quote:
Originally Posted by bdeanjr86 View Post
Sounds like the same advice WayOfLife was trying to give you?!
Quote:
Originally Posted by Uncle Sams Misguided Child View Post
Wow really? OP can you have a Mod move this over to Chit Chat? Please there are a few things I would like to respond too but this is in tech.
You didn't get your drama fix over on that site, so you need to start it here too?



Cajun, when you get a chance, there is some good info and diagrams in the tech info area on Tom Woods website.

http://www.4xshaft.com/
GreenJK is offline  
post #12 of 12 Old 01-31-2012, 04:30 PM
Rock God
 
toymaster's Avatar
 
Join Date: Feb 2011
Location: Clark, Wyoming
Age: 48
Posts: 1,152
Garage
Feedback: 2 reviews

Quote:
Originally Posted by jvandy50 View Post
So does everybody over 4in lift with aftermarket shafts just have flighty steering?

Vandy
Nope, they just deal with a less than great pinion angle. It is best to remove as much as possible without causing bad handling. In the old days it did not matter much because we just unlocked the hubs when going highway speeds.

Quote:
Originally Posted by virtual_mage View Post
.....a dark forum, were people would sometimes be rude but yet be helpful.
JK 2dr rubi
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
toymaster is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JKowners.com : Jeep Wrangler JK Forum 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 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 On
Pingbacks are On
Refbacks are On

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