How does a transfer case lowering kit work. - JeepForum.com

Reply
 
LinkBack Thread Tools
post #1 of 28 Old 01-21-2009, 08:32 AM Thread Starter
blackcat471
Registered User
2003 TJ Wrangler 
 
Join Date: Dec 2008
Location: Hesperia, ca
Posts: 248
How does a transfer case lowering kit work.

Okay I was reading the instructions for the transfer case lowering kit and i'm a bit confused as to how it works. It looks to me like it's just spacers that lower the skid plate that goes under the t case not the t case itself. The t case is connected to the tranny and I don't see how that can be lowered without disconnecting from the tranny. Can someone please explain how they work. Thanks in advance.

blackcat471 is offline  
Sponsored Links
Advertisement
 
post #2 of 28 Old 01-21-2009, 08:35 AM
TheBoogieman
Disturbed
 
TheBoogieman's Avatar
2003 TJ Wrangler 
 
Join Date: Aug 2006
Location: CharlottesHELL
Posts: 33,437
The transmission/t case. is bolted to that skid,lower the skid,lower the transmission.
TheBoogieman is online now  
post #3 of 28 Old 01-21-2009, 08:36 AM
jeep95xj
Web Wheeler
1995 XJ Cherokee 
 
Join Date: Dec 2008
Location: Long Island NY
Posts: 1,810
On a TJ the t-case is bolted to the skid plate so when you lower the slid plate, you also lower the t-case. Follow the instructions and you will see. Sometimes a visual is easier
jeep95xj is offline  
post #4 of 28 Old 01-21-2009, 08:37 AM
BlazinJack
Registered User
2006 TJ Wrangler 
 
Join Date: Oct 2008
Location: Denver
Posts: 592
your correct, you put the spacers in between your t-case/tranny crossmember (skid plate) and the frame. you dont need to disconnect anything. just use a floor jack to hold the plate, unbolt the (6) bolts lower the skid, and install the spacers, and bolt it back up.

"No beer and no t.v. make Jack something something..."
Colorado Jeep Club #145!!
Black Jeep Society
BlazinJack is offline  
post #5 of 28 Old 01-21-2009, 08:39 AM
TheBoogieman
Disturbed
 
TheBoogieman's Avatar
2003 TJ Wrangler 
 
Join Date: Aug 2006
Location: CharlottesHELL
Posts: 33,437
Quote:
Originally Posted by BlazinJack View Post
your correct, you put the spacers in between your t-case/tranny crossmember (skid plate) and the frame. you dont need to disconnect anything. just use a floor jack to hold the plate, unbolt the (6) bolts lower the skid, and install the spacers, and bolt it back up.
You're supposed to loosen the 4 bolts under the skid also,that way the transmission can shift when lowering it.
TheBoogieman is online now  
post #6 of 28 Old 01-21-2009, 08:48 AM
NotOfThisWorld
Registered User
2006 KJ Liberty 
 
Join Date: May 2008
Location: Phoenix, AZ
Posts: 472
Or... you do a 1" motor mount lift and keep your clearance under your skid plate. Accomplishes the same purpose, especially if you plan on doing a 1" body lift.

Blue Jeep Club Member #151
Arizona Jeep Club Founder
NotOfThisWorld is offline  
post #7 of 28 Old 01-21-2009, 08:52 AM
Faramir66103
Registered User
1999 TJ Wrangler 
 
Join Date: Apr 2006
Location: Crescent Springs, KY
Posts: 1,134
I was wondering the same thing a while ago. What I was missing is that the engine has a mount on either side that acts as a pivot. The next mounting point of the driveline is the transmission and transfer case crossmember/skid plate. When you install those spacers, the transmission and transfer case come down and the engine pivots up at the front a bit, and down at the rear. This changes the angle of the rear driveshaft and reduces stress on the single universal joint and therefore reduces driveline vibration.

Many folks who don't want to lower their transmission/transfer case crossmember/skid (and thereby loose clearance) install a slip yoke eliminator (SYE) and constant velocity (CV) equipped driveshaft. The SYE shortens the length of the transfer case assembly (allowing for a longer driveshaft) with the end result being to relax those driveline angles similar to the lowering kit. The CV driveshaft has 2 universal joints to distribute the angles further, again reducing stress on the joints and shaft and therefore reducing driveline vibration. I also understand that adjustable control arms and/or longer than stock control arms can also figure into the equation, but I'm now at the limit of my understanding, so perhaps more knowledgeable folks will chime in.

HTH,
Adam

'99 TJ Sport, 4.0 I6, 5 speed manual transmission, Hi Lift w/offroad kit, Viair 450C compressor, Garmin GPS, Skid Row Engine/Transmission, steering box & radiator skid plates, Kilby gas tank plate, AtoZ Fab full length rocker guards, Performance Accessories 1" Body Lift, OME 2.5" HD springs & shocks, JKS trackbars front & rear, BFG AT 33x12.5r15, EBC Yellow pads and Centric rotors
Faramir66103 is offline  
post #8 of 28 Old 01-21-2009, 03:30 PM
jeep95xj
Web Wheeler
1995 XJ Cherokee 
 
Join Date: Dec 2008
Location: Long Island NY
Posts: 1,810
raising the motor 1" can cause other problems. Fan problems, ac line problems, air intake hitting the hood problems (mostly on the XJ) Your BEST bet is a SYE kit otherwise do the t-case drop.
jeep95xj is offline  
post #9 of 28 Old 09-29-2009, 10:26 AM
rdping
Registered User
2006 TJ Wrangler 
 
Join Date: Jun 2009
Location: Orange Park, FL
Posts: 47
Will installing a 1" body lift and 1" motor mount eliminate the need for transfer case drop kit?
rdping is offline  
post #10 of 28 Old 09-29-2009, 10:49 AM
mdm
Farm Wheeler
2000 TJ Wrangler 
 
Join Date: Apr 2005
Location: Elkmont
Posts: 10,048
Quote:
Originally Posted by jeep95xj View Post
raising the motor 1" can cause other problems. Fan problems, ac line problems, air intake hitting the hood problems ...
Only the fan is a problem in the TJ and that is easily fixed.


Quote:
Originally Posted by rdping View Post
Will installing a 1" body lift and 1" motor mount eliminate the need for transfer case drop kit?
Maybe. I know it's not a good answer but that's the way it is. Each TJ is a little different and what might work for you may not work for me. A 1" MML does not change the output shaft angle as much as a 1" transfer case drop will. However, even if the MML does not completely eliminate the vibrations it will reduce the amount the transfer case has to be dropped. You can use washers between the skid and the frame and add/remove washers until you find the amount needed to take care of your problem.

Keep in mind that free advice can frequently be worth less than you pay for it.
mdm is offline  
post #11 of 28 Old 07-12-2010, 11:04 AM
npagnotta
Registered User
1982 CJ7 
 
Join Date: May 2010
Location: Atlanta
Posts: 26
I have a 1982 CJ7 with a 305 Chevy V8 and a 4 speed manual tranny. My front drive Axel in hitting the bell housing when I use my 4wd. I bought the jeep used and it looks like it has a 4" suspension lift and a 2" body lift. I am running 33 12x50's with plenty of clearance if that helps. Would a t-case lowering kit solve my problem?
npagnotta is offline  
post #12 of 28 Old 07-12-2010, 11:10 AM
mdm
Farm Wheeler
2000 TJ Wrangler 
 
Join Date: Apr 2005
Location: Elkmont
Posts: 10,048
Quote:
Originally Posted by npagnotta View Post
I have a 1982 CJ7...
You'd be better off asking in the CJ forum.

CJ Technical Forum - JeepForum.com

Welcome to the forum.

Keep in mind that free advice can frequently be worth less than you pay for it.
mdm is offline  
post #13 of 28 Old 12-19-2010, 07:18 PM
jlewber
Registered User
2005 TJ Wrangler 
 
Join Date: Nov 2010
Location: Covington
Posts: 6
By lowering the Transmission/Transfer case will this cause problems with the shifter? Finding rev?
jlewber is offline  
post #14 of 28 Old 12-19-2010, 07:44 PM
dcope17
Registered User
2006 TJ Wrangler 
 
Join Date: Sep 2008
Location: SoCal
Posts: 2,306
^^^ it can...

.

Life with Christ can be explained like a Jeep...
Being in the Word... grows your tire size.
Prayer... gains more ground clearance.
Fellowship... Is like having a good spotter.

The more of these you have... the easier it is to get over obstacles in your path.
.
.My Bible Thread
dcope17 is offline  
post #15 of 28 Old 12-20-2010, 02:14 PM
jlewber
Registered User
2005 TJ Wrangler 
 
Join Date: Nov 2010
Location: Covington
Posts: 6
I pulled my center consol apart and my shifter is hitting the tub when I put it in reverse. The inner rubber boot has a big hole in it, It must have been rubbing for a while. I guess I need to cut some of the tub out of the way so it wont rub any more.
jlewber 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
transfer case lowering kit jsa30 TJ Wrangler Technical Forum 5 02-22-2012 10:42 PM
Transfer case lowering or not cowboy1107 TJ Wrangler Technical Forum 6 08-31-2009 07:07 PM
Lowering the transfer case ? Silver04TJ TJ Wrangler Technical Forum 3 04-04-2008 02:19 PM
Transfer case lowering kit samger2 TJ Wrangler Technical Forum 3 07-26-2005 12:42 PM
Transfer case lowering??? tufmar YJ Wrangler Technical Forum 7 05-01-2002 10:51 PM

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