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Unread 06-11-2002, 01:53 PM   #1
Need A CJ-7
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Help w/ quadtratrac vs. 4wd

I've got an opportunity to pick up a nice 78 cj 7 w/ a 258 automatic w/ quadtratrac. My question is this: Is the q system worth it, or should I go for the 4x4 system? Any other things I should be looking for?? Jeep buying is new to me, but I do know a thing or two.
Thanks.


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Unread 06-11-2002, 05:42 PM   #2
buddhasbomb
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the q is nice because its alway there.the drawback can be repair costs.the regular is nice because you decide when to engage it.the q trac can be hard on fuel too but on a cj you wont see much of a difference. id say if its in decent shape and reasonably priced go for it
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Unread 06-11-2002, 06:14 PM   #3
Bulletproofcj7
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I have had problems in the past with my first jeep, It had quaertrac and i went through two transfercases because the chain loosened up and would jump the teeth on the gears thus no four wheel drive!
It is also rough on gas mileage.
I prefer the standard 4x4 system with a dana 300 TC. but you can always upgrade once you get the jeep if needed
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Unread 06-12-2002, 02:49 AM   #4
cj7traildriver
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If you do more on road driveing with it then off road will have more problems with the quad. Any time driveing on hard pavement in 4 wheel drive is hard on the drivetrain so Im not a fan of full time 4 wheel drive unless used for off road only then the advantage of full time 4 wheel drive is that you can have both pumpkins to one side.
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Unread 06-12-2002, 07:53 AM   #5
4wheeler4CJ
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Another vote for manual locking and regular 4wd. Quadratrac (in addition to everything already said above) causes heavy wear and tear on all drivetrain components, tires, tie rods, balljoints, etc, due to the full time 4wd. It is not like full-time 4wd that is in use in modern vehicles. The new systems tend to distribute traction where necessary. Quadratrac is not discriminatory like that.

However, if you can get it nice and cheap, buy it anyway, and drive it a while, while looking for a tranny/tc component to swap in some day. <img border="0" title="" alt="[Wink]" src="wink.gif" />

Good Luck!
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Unread 06-12-2002, 06:44 PM   #6
jeepdaddy2000
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I belive Mile Marker used to(still does?) make a part time conversion kit for the Q-track. Might be an alternative.
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Unread 06-12-2002, 07:36 PM   #7
knowlwk@snowhill.com
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Seems like I read that the quadratrac equipped jeeps have the drive shafts shifted to the right compared to the 20 and 300. So one or both of the axles were set up diferently and wouldn't match up with a 20 or 300. I could very well be wrong, so don't take that as a given... I just thought it would be worth confirming before buying a quadra'd jeep with the plan of changing the TC later...
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Unread 06-13-2002, 06:08 AM   #8
Bulletproofcj7
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</font><blockquote><font size="1" face="Verdana, Arial">quote:</font><hr /><font size="2" face="Verdana, Arial">Originally posted by knowlwk@snowhill.com:
<strong>Seems like I read that the quadratrac equipped jeeps have the drive shafts shifted to the right compared to the 20 and 300. So one or both of the axles were set up diferently and wouldn't match up with a 20 or 300. I could very well be wrong, so don't take that as a given... I just thought it would be worth confirming before buying a quadra'd jeep with the plan of changing the TC later...</strong></font><hr /></blockquote><font size="2" face="Verdana, Arial">Thats correct. If you were to convert to a non Quadratrac system you would need to replace the rear axle as well as the TC. would be a good time to up grade to wide trac axles to.
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Unread 06-13-2002, 07:55 AM   #9
4wheeler4CJ
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Sh*t, you're right, they did have the funky setup. Well, luckily, rear axles, especially narrow tracs, are fairly cheap, and are easy to swap. Just need to match the gearing to your current one. If going to widetracs, look for a matched pair with decent gears (ratio).
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Unread 06-13-2002, 09:33 AM   #10
GroundUpCJ7
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Uhh...correct me if I'm wrong, but the qtrac used locking hubs, at least mine does. Also, I have a lever to engage the qtrac, it's not always running in 4wd. I think a lot of disdain for the quadratrac stems from a lack of understanding of the system. It's a perfectly good system, and actually it still exists today, but replacement parts are hard to find. Now I know that there are companies out there making full time conversion kits for the qtrac, which would engage the driveline components, up to the locking hubs, full time, but that's only a last resort. Due to the lack of understanding of this perfectly fine T/C, you can usually pick up the qtrac fairly cheap. Don't let the driveline stop you from buying this thing. Good luck.
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Unread 06-14-2002, 08:06 AM   #11
Bulletproofcj7
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</font><blockquote><font size="1" face="Verdana, Arial">quote:</font><hr /><font size="2" face="Verdana, Arial">Originally posted by GroundUpCJ7:
<strong>Uhh...correct me if I'm wrong, but the qtrac used locking hubs, at least mine does. Also, I have a lever to engage the qtrac, it's not always running in 4wd. I think a lot of disdain for the quadratrac stems from a lack of understanding of the system. It's a perfectly good system, and actually it still exists today, but replacement parts are hard to find. Now I know that there are companies out there making full time conversion kits for the qtrac, which would engage the driveline components, up to the locking hubs, full time, but that's only a last resort. Due to the lack of understanding of this perfectly fine T/C, you can usually pick up the qtrac fairly cheap. Don't let the driveline stop you from buying this thing. Good luck.</strong></font><hr /></blockquote><font size="2" face="Verdana, Arial">You could be right, but to the best of my knowledge Quadratrac never had a TC shifter that disengaged the front drive (from the factory)only a high/low range shifter on some. I had one with, and another one, that was behind the 304 v8 that did not have any shifter, full time high range only.
They had a one piece metal plate that engaged the front wheels "full time"instead of hubs.( a good part to have on board incase you grenade a hub!) Installing lock out hubs is as easy as on any other jeep, they just bolt on more or less but the front driveshaft still turns as you can not disengage the tc( unless it has been up graded with a kit)
The transfer case is chain driven, That chain eventually stretches and jumps the teeth on the cogs. i dont recall whether or not there is an adjustment to take up the slack but once it loosens up you're hard pressed to limp it home on the road never mind getting it out of the woods!
I took the front driveshaft out when i was commuting to school to save on fuel(minimal saving i think) but if you do this you need to lock in the emergency drive in the glove box or you wont move!
That emergency drive is run on vacume, if there are any leaks in that system it wont work right, just another potential problem with the system.

If you have a good deal on a jeep go for it weather or not it has quadra trac! there are so many jeep parts around that they can easily be changed!
I rebuilt mine from the ground up, it used to have the Qudratrac system, i scrapped that and found a 82 CJ7 that i took the wide trac axles, TC and tranny out of and bolted it into mine.
Bottom line, if it is in good shape and everything works, its a good deal? buy it and worry about up grading it later if it needs to be, just drive it and have fun!
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1982 cj7. Frame off. shell valley kevlar body, stainless hinges, Bestop seats and supertop, KC titanium lights, Homemade swing out tire carrier with spare front wheel bearings/hub, Built 304,DUI,Edelbrock shorty headers with dual stainless 21/2 tubes into incynerator cans 21/4 dumped out the back,Edelbrock 600cfm, performer intake and cam, Borgeson lower column, Centerforce clutch, NV-4500, Dana 300 w/custom built twin stick, Homade 1/4" steel skid plate, 2.5 soft ride w/ 1" shackle lift, 33x12.5 mtr's. Stainless fuel and brake lines, Braided hoses. more...
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Unread 06-14-2002, 09:26 AM   #12
4wheeler4CJ
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What he said

Hell, my '77 CJ-7 in my signature used to be a Quadratrac automatic with a 258 from the factory.

Now, that is gone, and it is a 1972 AMC 360 with Fenderwells, 2 1/2" Aluminized Pipe, and Flowmaster Delta Flow 40s, T-18A Tranny, Dana 20 Transfer Case, and Warn Manual Locking Hubs.

These things are so easy to convert, regardless of what you want to do, so if the price is right, do it! <img border="0" title="" alt="[Wink]" src="wink.gif" />
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