Back from Afghanistan and need help! - JeepForum.com
 
LinkBack Thread Tools
post #1 of 10 Old 08-16-2011, 08:38 PM Thread Starter
thunderstar99
Registered User
1990 YJ Wrangler 
 
Join Date: Apr 2010
Location: Ft Campbell, KY
Posts: 63
Back from Afghanistan and need help!

I just got back from Afghanistan and installed my 3 1/2 inch lift with 1 inch shackles and was wondering if I needed to upgrade my rear driveshaft to make it longer with that much lift. Thanks, William

thunderstar99 is offline  
Sponsored Links
Advertisement
 
post #2 of 10 Old 08-16-2011, 08:44 PM
dillonjm
Registered User
2013 WK 
 
Join Date: Jun 2003
Location: Wichita Falls, TX
Posts: 4,167
Welcome back bro.

The answer is: it depends. If you're not getting any driveline vibrations after the install at highway speeds then you don't need to worry about it.

Did your kit have a t-case skid drop with it?

13 GC Overland - 5.7, stock
dillonjm is offline  
post #3 of 10 Old 08-16-2011, 08:54 PM
Dlambright
Registered User
1995 YJ Wrangler 
 
Join Date: Jul 2010
Location: lovelady texas
Posts: 195
Welcome home & thank you for your service! To answer your question, no you dont. You may need to shim the pinion up a bit if you get some vibes, but the driveshaft is fine with that much lift. You used a t-case drop kit with the lift right?
Dlambright is offline  
post #4 of 10 Old 08-16-2011, 10:39 PM Thread Starter
thunderstar99
Registered User
1990 YJ Wrangler 
 
Join Date: Apr 2010
Location: Ft Campbell, KY
Posts: 63
Yes I used the t-case drop kit and I also got it all put back together and the rear shackles are facing the wrong direction so I have to go back and take care of that. I had never done anything that big before and was surprised how easy it actually was. Had to replace a lot of other stuff because the po didnt maintain it mechanically. I will try to put some pics up. Thanks for the info I really appreciate it as this is my first jeep and first build and I think Im addicted.
thunderstar99 is offline  
post #5 of 10 Old 08-16-2011, 10:48 PM Thread Starter
thunderstar99
Registered User
1990 YJ Wrangler 
 
Join Date: Apr 2010
Location: Ft Campbell, KY
Posts: 63
023.jpg

024.jpg
thunderstar99 is offline  
post #6 of 10 Old 08-16-2011, 10:52 PM
DavidHoover
Registered User
1994 YJ Wrangler 
 
Join Date: Apr 2010
Location: Indianapolis
Posts: 123
That's one of the best looking YJ's i've seen in a while!!!
DavidHoover is offline  
post #7 of 10 Old 08-17-2011, 08:52 AM Thread Starter
thunderstar99
Registered User
1990 YJ Wrangler 
 
Join Date: Apr 2010
Location: Ft Campbell, KY
Posts: 63
Still have to retorque everything after it settles and then touch up on the paint to help with the rust and then on to the next part of the build.
thunderstar99 is offline  
post #8 of 10 Old 08-17-2011, 11:13 AM
dadstoy
Registered User
1995 YJ Wrangler 
 
Join Date: Dec 2005
Location: Livingston
Posts: 1,134
Torque your shackle bolts to 45ft/lbs or so. Flexes better and rides better.
dadstoy is offline  
post #9 of 10 Old 08-17-2011, 11:34 AM
Alfons
Registered User
1992 YJ Wrangler 
 
Join Date: Jul 2005
Location: Ontario, Canada
Posts: 2,217
Quote:
Originally Posted by thunderstar99 View Post
I just got back from Afghanistan and installed my 3 1/2 inch lift with 1 inch shackles and was wondering if I needed to upgrade my rear driveshaft to make it longer with that much lift. Thanks, William
Have a look at the slip yoke and see how far out the lift has pulled it, you'll see some clean steel where that part of the yoke was behind the seal & the farther out it is, the less connection there will be between the yoke and the output shaft. The drive shaft isn't affected by the body lift & with only a 1" shackle lift, the shaft extension shouldn't be bad, so you probably don't need to do anything. Be careful about the t-case drop kit, this can sometimes change the U-joint angles to the point of causing vibration - there are a number of pictures around on what the angles should look like, but ideally the t-case and pinion u-joint angles should be the same (unless you have a double-cardan joint at the t-case).
Alfons is offline  
post #10 of 10 Old 08-17-2011, 11:45 AM
dtn8tr
Registered User
1997 TJ Wrangler 
 
Join Date: Mar 2010
Location: Waconia
Posts: 1,323
Look at your front shackles...they are backwards. The rears are good. The front should have the short side of the shackle attached to the frame and the point should point into the center of the vehicle like this... > <, front and rear.

1997 TJ, 5" IRO front with 4.5" HD IRO WJ rear, 35x12.5x15 Mickey Thompson MTZ, JKS disconnects
dtn8tr 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



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
Jeep Wrangler Rubicon Driving Through Afghanistan Mountains! strokera4 Wrangler General Discussion 7 01-06-2011 01:28 AM
Returning from Afghanistan, need help spending $ Washi TJ Wrangler Technical Forum 22 04-24-2010 06:28 PM
Needing a little bit of help in Afghanistan OEFsahara YJ Wrangler Technical Forum 4 11-30-2008 08:24 AM
Back From Afghanistan JSimmons Wrangler General Discussion 27 06-10-2008 08:43 AM

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