Re-gearing my 1991 yj - JeepForum.com

 
LinkBack Thread Tools
post #1 of 5 Old 02-12-2011, 10:48 PM Thread Starter
jrayjeepcj2a
Registered User
2006 TJ Wrangler 
 
Join Date: Mar 2009
Location: georgia
Posts: 6
Re-gearing my 1991 yj

I have a 4 or a 4.5 inch suspension lift with a 3 inch body lift. I am currently running 35x12.5 pro comp all terrains on the stock axles/gears. I havent really researched it much, i figured someone on hear could give me a hand. What kind of gear ratio would be best with the set up i have (4cyl amc 150, stock transmission, etc.). Also, my four wheel drive will engage into 4 low, however the front axle is not catching to rotate the tires. I really have no knowledge of the mechanical components inside the differential or the transfer case but im gotta learn somehow. If anybody has any advice for me that would be great!

jrayjeepcj2a is offline  
Sponsored Links
Advertisement
 
post #2 of 5 Old 02-13-2011, 07:20 AM
KLT88YJ
Registered User
1988 YJ Wrangler 
 
Join Date: Oct 2010
Location: Baltimore
Posts: 243
As far as your re-gearing I'd go with 4.88's in the Dana 30 & 35. That's the lowest gear set those axles can accommodate. Factory has 4.10's which is good for stock and possibly up to a 31 or 32" tire, but it gets Very difficult to maintain speed on the highway. You'll probablly want to look into a Dana 44 rear or a Ford 8.8 out of an explorer. They'll hold up better than the Dana 35 with the increased weight and stress of the 35" tires.

For the transfer case/ front drive shaft issue, the shift fork collar on the axle disconnect might not be fully engaging? There's a cover plate on the back right side of the front axle, this is the disconnect. If they loose vacuum or proper connection they will not function properly. Fixes are (least expensive to most$$): junkyard late model Cherokee or 97+ Wrangler passenger side axle shaft, posi-lock or warn chromoly cad delete shafts. Hope this helps.
KLT88YJ is offline  
post #3 of 5 Old 02-13-2011, 08:11 AM
leftlanetruckin
XJ on 37's
 
leftlanetruckin's Avatar
1998 XJ Cherokee 
 
Join Date: Jul 2006
Location: missouri via blackpool,lancs.
Posts: 10,625
Go to the YJ tech section and read the FAQ.
All your questions are covered there, as well as the next 25 you were thinking of asking...

Martin

1998 XJ on 37's.JK Rubi axles with chromo shafts and ctm's, 4:1 transfer case, etc etc etc.
2003 Range Rover HSE, 4.4 Quad Cam.
1998 Range Rover with a 6.0 LSx
1994 YJ, 4.3/700R4/OME SOA, etc
Western Star 4900EX 4 axle.
4.3/700r4/new frame buildup (YJ)....
http://www.jeepforum.com/forum/f12/swap-offically-underway-324622/
leftlanetruckin is offline  
post #4 of 5 Old 02-13-2011, 09:22 AM Thread Starter
jrayjeepcj2a
Registered User
2006 TJ Wrangler 
 
Join Date: Mar 2009
Location: georgia
Posts: 6
Alright, i appreciate it, hopfully this will help, im currently trying to graduate from college so hopefully i'll have some time to look into your advice. i really have no income so funds come and go as they please, haha
jrayjeepcj2a is offline  
post #5 of 5 Old 02-13-2011, 09:46 AM
KLT88YJ
Registered User
1988 YJ Wrangler 
 
Join Date: Oct 2010
Location: Baltimore
Posts: 243
Well the Nutter is pretty much free! Good luck with your build!
KLT88YJ 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
will 2004 wrangler rim fit 1991 cherokee oneoclock Tires & Wheels 1 09-13-2009 08:35 PM
1991 XJ swap crf450ish Engines & Drivetrain 0 08-04-2009 11:01 PM
1991 renegade fenders??? Goobersbro Fabrication Shop 5 11-05-2008 02:53 PM
Sensor Resistances For 1991 Up Please shinigami Audio, CB & Ham Radios, GPS, & Electrical 0 06-27-2008 02:24 PM
nv3350 into a 1991 yj? iking87 Engines & Drivetrain 10 11-20-2006 02:42 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