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post #1 of 14 Old 09-15-2006, 10:09 AM Thread Starter
sefh
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CJ DriveLine

Can someone tell me the difference between a CJ5 and CJ7 when it comes to swapping driveline parts? What I really want to know is if a CJ5 motor, trans, t/c will swap into a CJ7. The motors are both a 304. The 5 is an auto and a 7 is a 4 speed manual.

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post #2 of 14 Old 09-15-2006, 10:44 AM
No_Bs
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Everything except the rear driveshaft should bolt right up.
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post #3 of 14 Old 09-15-2006, 02:17 PM Thread Starter
sefh
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What is the difference in the driveshafts? Would the front work?
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post #4 of 14 Old 09-15-2006, 03:04 PM
jeepskate
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Difference is 10" in wheelbase length which directly impacts the rear driveshaft length. Now from there you will also have different driveshafts lengths depending upon the trans/t-case combo...ie: A CJ-7 and CJ-5 with the same drivetrain will only be different in the rear driveshaft...change the trans and/or t-case and you potentially change both driveshaft lengths...ie: a CJ-7 with a T-150/D20 combo will have different shafts from a CJ-7 with a TF999/D300 combo.

'86 CJ-7 Laredo: 4.2,T-999,D300,D30/D44,'94 YJ tub, full cage, Shrockworks rockers, OYR corners, AC,cruise,restored seats,3 tops,2.5" Superlift,F-T shackle reversal, RS9000x's,35" Dunlop Mud Rovers.
'83 Scrambler: time & money pit under construction with parts from CJ's,YJ's,TJ's,FSJ's,GM,Ford,IH,Honda,Toyota and a whole lotta aftermarket & custom stuff.
http://www.jeepskate.net
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post #5 of 14 Old 09-15-2006, 07:52 PM Thread Starter
sefh
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What years were the CJ5's in? The frame my buddy bought was a 78 or 79. The owner was not sure and he has a 86 CJ7 that he is planning to exchange the motor, trans, t/c from the CJ Frame that he bought and I was just trying to help him out. What is the wheelbase for a CJ5 so we can tell if the frame was a 7 or 5.
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post #6 of 14 Old 09-15-2006, 09:00 PM
jeepskate
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CJ-5's were the longest running model...they ran from 1955 to 1983. CJ-7's ran from 1976-1986, so your safest swaps between the two are 1976-1986. The are various differences in the CJ-5's pre-'76. CJ-5 *never* came with an auto, so that makes me a little doubtful about the chassis that you bought being from a CJ-5. CJ-5 from that vintage should have about an 83" wheelbase.

'86 CJ-7 Laredo: 4.2,T-999,D300,D30/D44,'94 YJ tub, full cage, Shrockworks rockers, OYR corners, AC,cruise,restored seats,3 tops,2.5" Superlift,F-T shackle reversal, RS9000x's,35" Dunlop Mud Rovers.
'83 Scrambler: time & money pit under construction with parts from CJ's,YJ's,TJ's,FSJ's,GM,Ford,IH,Honda,Toyota and a whole lotta aftermarket & custom stuff.
http://www.jeepskate.net
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post #7 of 14 Old 09-24-2006, 06:43 AM Thread Starter
sefh
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Ok I picked up the rolling chasis yesterday and now I have questions.... My Jeep is a 86 CJ7 304 T176 Trans and a Dana 300 and the chasis I bought is a 78 CJ7. It has a 304 with a Turbo Hydro Matic trans. I plan on switching the trans, t/c, driveshafts and rear axle for the 78 to the 86. But the transfer case from the 78 does not have a shifter on it it looks like it is done by vacuum is the true and if so what switch do I need to buy for this to work and also on the 86 I have manual lockout in the front and the 78 has automatic lookouts do I need to switch front axles also........Thanks for the help
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post #8 of 14 Old 09-24-2006, 07:01 AM
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Sounds like the 78 has a quadratrac. IMO, I would try and keep the Dana 300 as it is definitely a stronger tcase. I believe you also will be going from the 86 widetrack axles to narrow tracks. Again, another swap down IMO. I would just look at swapping the engine and trans if that was what originally motivated this project.
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post #9 of 14 Old 09-24-2006, 09:27 PM
jeepskate
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Yup, that's q-trac. Narrow track axles, chain drive t-case, and full-time 4WD (*not* auto-locking hubs...it has drive flanges). Not the greatest swap idea.

'86 CJ-7 Laredo: 4.2,T-999,D300,D30/D44,'94 YJ tub, full cage, Shrockworks rockers, OYR corners, AC,cruise,restored seats,3 tops,2.5" Superlift,F-T shackle reversal, RS9000x's,35" Dunlop Mud Rovers.
'83 Scrambler: time & money pit under construction with parts from CJ's,YJ's,TJ's,FSJ's,GM,Ford,IH,Honda,Toyota and a whole lotta aftermarket & custom stuff.
http://www.jeepskate.net
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post #10 of 14 Old 09-25-2006, 08:12 PM Thread Starter
sefh
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Will the Quadratrac axles fit under an 86? I was thinking of swapping axles due to the fact that the springs are alot heavier and I plow snow with mine so that would help in the front.
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post #11 of 14 Old 09-25-2006, 09:09 PM
jeepskate
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The question is will narrow track axles ('76-'82.5) fit under a wide track CJ ('82.5-'86). The difference with the q-trac setup is that the rear narrow track axle has an offset pumpkin. Yes, they'll fit...the frames are nearly identical. You may have to fiddle with the front shock mounts. What you'll end up with is a narrower stance with less stability than your current setup. The q-trac, like most other CJ era drivetrain parts, is out of production and in addition has almost no aftermarket support (you *may* still be able to get some replacement parts like the chain and a part-time conversion kit from Milemarker). The springs have nothing to do with the axles. If you want the heavier springs, simply swap them over...the axle doesn't need to go with them. If I were going to run a q-trac in a newer rig (and I've considered it), I'd go through it and rebuild it, get a low range kit (some Jeeps had it, need to find one to snag it from) and part-time conversion, and grab the 44/44 combo out of a narrow track q-trac FSJ (move the rear spring pads, outboard the front springs)...been considering doing this the next time a cheap Scrambler comes my way.

'86 CJ-7 Laredo: 4.2,T-999,D300,D30/D44,'94 YJ tub, full cage, Shrockworks rockers, OYR corners, AC,cruise,restored seats,3 tops,2.5" Superlift,F-T shackle reversal, RS9000x's,35" Dunlop Mud Rovers.
'83 Scrambler: time & money pit under construction with parts from CJ's,YJ's,TJ's,FSJ's,GM,Ford,IH,Honda,Toyota and a whole lotta aftermarket & custom stuff.
http://www.jeepskate.net
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post #12 of 14 Old 09-25-2006, 09:25 PM Thread Starter
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Well I know that everone is saying that this is a downgrade but I have everything to do this swap and I only use my jeep in the winter and maybe a few times in the summer. All I really need to due is swap out the rear axle correct. The front looks the same beside the hubs. Can I use the current hubs and just lock them in when I lock in the 4wd?
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post #13 of 14 Old 09-25-2006, 11:39 PM
jeepskate
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Quote:
Originally Posted by sefh
Well I know that everone is saying that this is a downgrade but I have everything to do this swap and I only use my jeep in the winter and maybe a few times in the summer. All I really need to due is swap out the rear axle correct. The front looks the same beside the hubs. Can I use the current hubs and just lock them in when I lock in the 4wd?
The odds of the gear ratios matching are slim to none. Typically 70's 7's had 3.54's and 80's had 2.73's (3.31's with the towing package). The manual hubs are not directly switchable between the two...70's used a 6 bolt hub (much better), 80's used a 5 bolt hub.

'86 CJ-7 Laredo: 4.2,T-999,D300,D30/D44,'94 YJ tub, full cage, Shrockworks rockers, OYR corners, AC,cruise,restored seats,3 tops,2.5" Superlift,F-T shackle reversal, RS9000x's,35" Dunlop Mud Rovers.
'83 Scrambler: time & money pit under construction with parts from CJ's,YJ's,TJ's,FSJ's,GM,Ford,IH,Honda,Toyota and a whole lotta aftermarket & custom stuff.
http://www.jeepskate.net
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post #14 of 14 Old 09-27-2006, 10:08 AM Thread Starter
sefh
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I'm trying to find the switch that activates the transfer case and I found on through DORMAN Products but was wondering if it would work. Here is a link to it.


http://www.dormanproducts.com/cgi-bi...tegory_list=:0
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