Go Back   Great Lakes 4x4. The largest offroad forum in the Midwest > 4x4 Talk > Axle Tech
GL4x4 Live! GL4x4 Casino







Search
Reply
 
Thread Tools
Old February 16th, 2008, 07:40 PM   #1
ddeadserious
Senior Member
 
ddeadserious's Avatar
 
Join Date: 08-20-06
Location: Plymouth, MI
Posts: 5,078
iTrader: (44)
Mentioned: 0 Post(s)
Send a message via AIM to ddeadserious
Default Pinion Angle

This is for me putting my 8.8 into my XJ.

I have a SYE/CV Driveshaft.

I know the pinion should point directly at the t-case, but I've also read that it should be a certain degree up or down to account for axle wrap..

So what is it? Straight at the t-case or slightly up/down?
ddeadserious is offline   Reply With Quote
Old February 16th, 2008, 07:46 PM   #2
Jeepaholic
Axle Guru Extraordinaire
 
Jeepaholic's Avatar
 
Join Date: 04-08-06
Location: Owosso
Posts: 7,289
iTrader: (116)
Mentioned: 2 Post(s)
Send a message via AIM to Jeepaholic Send a message via MSN to Jeepaholic
Default

down 2 degrees is what I hear a lot.
Jeepaholic is offline   Reply With Quote
Old February 16th, 2008, 08:31 PM   #3
tcxtreme1000
Mud Slut-Hit Every Hole!!
 
tcxtreme1000's Avatar
 
Join Date: 01-25-06
Location: Traverse City
Posts: 2,061
iTrader: (13)
Mentioned: 0 Post(s)
Default

Straight Would be perfect but you but it down a couple degrees to keep the ujoints in service longer.
tcxtreme1000 is offline   Reply With Quote
Old February 16th, 2008, 10:22 PM   #4
hosejockey4506
Visiting Admin
 
hosejockey4506's Avatar
 
Join Date: 11-04-05
Location: fenton
Posts: 8,746
iTrader: (42)
Mentioned: 4 Post(s)
Default

Quote:
Originally Posted by tcxtreme1000 View Post
Straight Would be perfect but you but it down a couple degrees to keep the ujoints in service longer.

i have always been told 2 degrees under pointing straight at it and the reason is not for u joint life which makes sense but that way under load the spring wrap lines it up to be straight.
__________________
one of Michigans 99% er club.
hosejockey4506 is offline   Reply With Quote
Old February 16th, 2008, 11:39 PM   #5
Jsawduste
Senior Member
 
Jsawduste's Avatar
 
Join Date: 08-02-06
Location: New Baltimore
Posts: 662
iTrader: (15)
Mentioned: 1 Post(s)
Default

Quote:
Originally Posted by hosejockey4506 View Post
i have always been told 2 degrees under pointing straight at it and the reason is not for u joint life which makes sense but that way under load the spring wrap lines it up to be straight.
This is correct. The torque loads will twist the center ever so slighty within the spring. The 2 degrees down will help to cancel that out.
Jsawduste is offline   Reply With Quote
Old February 17th, 2008, 08:22 AM   #6
whiterhino
I'm not old, honest...
 
whiterhino's Avatar
 
Join Date: 03-07-06
Location: Davisburg MI
Posts: 20,678
iTrader: (21)
Mentioned: 8 Post(s)
Default

I've done it both ways. Can't say that I've seen a difference in u-joint life. I kinda look at it this way. If you are straight, 2 degrees above isn't going to hurt you under load if your suspension limits you to that. On the other hand highway driving is not putting enough load on your suspension to twist it. Therefore, you are running down the road 2 degrees below, which may cause slight vibrations and hurt the long term life of the joint.

I think it can be argued both ways.
whiterhino is offline   Reply With Quote
Reply
Great Lakes 4x4. The largest offroad forum in the Midwest > 4x4 Talk > Axle Tech
Thread Tools

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

Forum Jump



All times are GMT -5. The time now is 11:06 PM.


Powered by: vBulletin, Copyright 2000 - 2012, Jelsoft Enterprises Ltd.
User Alert System provided by Advanced User Tagging (Lite) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
Copyright 2005 - 2012 Cracker Enterprises - Powered by Linux
vB Ad Management by =RedTyger=
Page generated in 0.09944 seconds with 22 queries