quadra-trac - Off-Road Forums & Discussion Groups
Jeep-Short Wheelbase All discussion of short wheelbase Jeeps: CJ, TJ, YJ and JK

 
LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 03-01-2005, 02:53 PM
chrisce
Guest
 
Posts: n/a
quadra-trac

Thought I posted this earlier guess not.
Anyway what do you guys think about the quadra-trac transfer case? How are they off road? Any common problems? Is it best just to swap out or upgrade? How does the emergency mode work?
I found out that low range was an option are they hard to find?
This is for a 79 cj7.
Sponsored Links
Advertisement
 
post #2 of (permalink) Old 03-01-2005, 04:24 PM
Addict
 
Join Date: Sep 1999
Location: Atlantic City, NJ
Posts: 524
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: quadra-trac

If you do a search you'll likely find lots of good info on the qtrac. But here are some quick thoughts. I assume you mean the full-time 4wd used in Jeeps in the late 70's. If so, I had one for several years in my '77 CJ-7 and I liked it fine. Never had any major problems. Once I got the vacuum lines hooked back up the "Emergency Switch" worked fine. What it does is apply vacuum to a shift fork that "locks" the transfer case so that it applies power equally to the front and rear differentials. When not locked the power is biased and works like a limited slip differential applying an uneven split of power between the front and rear. The major complaint/problem w/the qtrac is that it is chain driven and that chain stretches over time. You can usually tell when it start slipping when you get a [img]images/graemlins/thud.gif[/img] or klunk during hard acceleration from a stand still. I have read folks getting around 40K miles or so out of a new chain. I have since swapped out my qtrac for a Dana 300 but that involved an expensive adaptor (got mine from Novak), moving/modifying the skid plate, and lengthening and shortening the front and rear driveshafts respectively. Now since I've never got my Jeep back on the road after I swapped the drivetrain into a new frames/body I can't say if it was worth the effort of the swap. Oh yeah, you also have to swap some internal pieces of the TH-400 auto transmission. I had this done when I had a bench rebuild done on my tranny. As for low range, it is a bolt on addition. I actually still have my old one and it worked fine. Only thing is you have to fab up a shift lever for it. If you are interested I'd be willing to sell my old qtrac stuff. I have 2 qtracs, both likely need chains but both worked when pulled, I also a low range unit that also worked and the old internal tranny pieces I swapped out for the 300 swap. These are all heavy peices so depending on where you are shipping may be prohibitive. If interested email me at [email protected] since I do not check this board everyday. Good luck,
rich
Atlantic City, NJ
fratt77CJ7 is offline  
post #3 of (permalink) Old 03-01-2005, 08:56 PM
Official Historian
 
WILL's Avatar
 
Join Date: Sep 1999
Location: Hot Springs, AR
Posts: 8,339
Thanks: 1
Thanked 5 Times in 5 Posts
 
Re: quadra-trac

That was a good reply. I have one too and like it as well. I mounted my switch just to the left of the headlight switch. I am in the process of swapping in a 700R4.
WILL is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Off-Road Forums & Discussion Groups 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 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
Trackbacks are On
Pingbacks are On
Refbacks are On

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