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Unread 01-04-2006, 08:21 AM   #1
Big_Black_YJ
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CJ-7 Drivetrain

just curious, as i don't know much about CJ's

there's a CJ-7 at my local junkyard with a 258 motor that they claim shot a rod.

I'm just wondering what model tranny or tranny's came with them...cuz i'll probably end up buying it if you guys tell me it's worth it.

Either i'll restore it, or swap the drivetrain into my YJ depending on which is in better shape!

thanks in advance!

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Unread 01-04-2006, 08:24 AM   #2
John Strenk
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You can check here for year and model "Stuff" and some pictures of each
http://www.off-road.com/jeep/swb/articles/specgrid.htm
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Unread 01-04-2006, 08:29 AM   #3
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It depends on the year really, do you know more information about the Jeep? If you are going to get it, make sure to see how the body and frame is or you might end up chasing your tail to get all that fixed prior to getting the engine to run or replacing the engine.

jeeptech.com has some info on the engines/trannies, etc. that came with the Jeeps. Find out what year it is.

Also, if you need another motor, there are usually some in the for sale sections or free sections.

cb
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Unread 01-04-2006, 08:32 AM   #4
Big_Black_YJ
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so the T-5 it has is probably no better than my puegeot, buuttttt

the dana 300 is worthy of a swap?


i was afraid to say it because i know it's blasphmeny, but what i REALLY want is to do a CJ nose-conversion, and i know i can get the truck pretty cheap. I was just wondering what else is worth taking off of the Jeep.

but if it's worth re-building the CJ i definetly won't take her apart...
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Unread 01-04-2006, 10:37 AM   #5
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I was looking at the link posted. I read that the 79' has a quadratrac t-case? I was under the thinkng that the 79's had the Dana20.

Anybody sure that chart is 100% correct?

I'd like to be sure of what I have. I need to crawl under her again, but it's hard to tell what's what with the amount of grime I'm seeing.
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Unread 01-04-2006, 10:47 AM   #6
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I think the info needs some updating because it says the same thing for 76 and I know I have a D20... and it was stock.

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Unread 01-04-2006, 10:53 AM   #7
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The quadratech is used with an automatic tranny (GMTH400?) used at that time. THe Dana 20 was used with the manual trannies (T-18 T-150). Looks like they forgot to add the Dana 20 for those years.
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Unread 01-04-2006, 10:57 AM   #8
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That's cool. I haven't done much to my Jeep like I had planned, but one of my upcoming projects is to rectify the rear driveshaft situation I have.

Not being a longtime Jeep guy most of my info is printed from this site, and what others have told me.

If you asked me to pick a Dana300 from a Dana20 from a Quadratrac in a lineup I'd be lost....

Thanks for the heads up John.

Blair
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Unread 01-04-2006, 11:12 AM   #9
John Strenk
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Actually, just look at the oil pan. The Dana 20 has a deeper oil pan than the Dana 300 and the Quadratec has the front and rear yokes on the same end.
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Unread 01-04-2006, 11:44 AM   #10
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Quadra Trac was used with the automatic in years 76 through 79.

John is also correct with the Quadra Trac case. Both front and rear axles have passenger drop differentials.

John, did you get your 1 piece alxes in?
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Unread 01-04-2006, 12:13 PM   #11
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What years is the CJ in the junkyard? If it's 82-86 it has the wide trac axles.
I would keep the YJ tub (it's galvinized) and swap out everything else. The older Dana 30 front and AMC 20 rear, are a lot strong then the axles you have now. FYI the Dana 300 transfer case started in 1980 and went until 86' 79 and older had the Dana 20 unless it was a auto trans.
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Unread 01-04-2006, 12:14 PM   #12
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Quote:
Originally Posted by Sprkplug
...John, did you get your 1 piece alxes in?

"You want it when?"

I was going to do that first week of Chrismas vacation but the wife had other plans.

Basically just waiting to bolt them in some day I have a couple of hours to spare.
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Unread 01-04-2006, 01:21 PM   #13
Sprkplug
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Quote:
Originally Posted by John Strenk
"You want it when?"

I was going to do that first week of Chrismas vacation but the wife had other plans.

Basically just waiting to bolt them in some day I have a couple of hours to spare.
I know I felt bad thinking I had a good part. Should have look better before offering Live and learn
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Unread 01-04-2006, 01:50 PM   #14
Big_Black_YJ
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Quote:
Originally Posted by dawgates
What years is the CJ in the junkyard? If it's 82-86 it has the wide trac axles.
I would keep the YJ tub (it's galvinized) and swap out everything else. The older Dana 30 front and AMC 20 rear, are a lot strong then the axles you have now. FYI the Dana 300 transfer case started in 1980 and went until 86' 79 and older had the Dana 20 unless it was a auto trans.

i think it's an 82-86

they had two, one was totaled head-on and i snagged the hard-top from it for $50, and this one sits complete in the back of the year...it's got the paddle style doors on it....and if i recal....the 81 and older Jeeps had a different handle, right?

i thought the amc 20 was weaker than the dana 35 because it's got two peice axles and the axles tubes aren't really held onto the pumpkin? Myth, or just wrong information?

Say if i trussed it and got those one-peice axles...what size tire could i run up on this puppy?

thanks for all the help

EDIT: i know it's a manual, and it's a 6 cylinder, but i don't know if it's a four or a five-speed?...were all 258's 5 speed T-5's?
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Unread 01-04-2006, 02:24 PM   #15
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Quote:
Originally Posted by Big_Black_YJ
i think it's an 82-86



i thought the amc 20 was weaker than the dana 35 because it's got two peice axles and the axles tubes aren't really held onto the pumpkin? Myth, or just wrong information?thanks for all the help

An amc 20 is plenty strong with one peice axles and welded tubes,truss etc. I ran 33 swampers to hell and back and lincoln locked the thing and never even spun the factory hubs. They are a 29 spline ,A 44 is only 30 spline I beleive. The transfer case will need to be flipped if you are not going to change your front end. As your drop is on the drivers side.

Yes all the 258s with a five speed were using the t5s. Some of them had a t176if I am not mistaken.
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