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Old 07-04-2011, 10:45 AM   #1
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what size axles come stock on a cj7

my first jeep i had was a 1976 cj5 but i had dana 60s under it amc 304 mini spoil in the back. warn lockers in the front. 6 inch suspension lift 2 inch body. and idk what gears it had but they were very low, almost like a tractor! lol. i was averaging about 6 mpg and it was my dd.. i couldnt afford it anymore, im only 17 with a part time job.. so i traded it for a 95 yj. i regret that now .. well going from the beast i had to this little thing i didnt like it... and i know if i run a tire bigger then 33 i need to upsize my axles.. and im not wanting to go into my dd that deep, so there is a 1983 cj7 sitting in a neighbors yard.. i would love to it and lift it and tires because those have lockers in the front and are more of a jeep then my yj so if i got it would the stock axles be strong enough for me to run 35s and go off in the woods? what size are they?

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Old 07-04-2011, 01:35 PM   #2
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Stock CJ's came with a Dana 30 front and a amc 20 rear. Some '86 cjs had a dana 44 rear. Gearing was 3.54 until around '80 and changed I think to 3.07. However I don't think any cjs came with front lockers.

As far as the tire size question. You will hear different opinions but running 35's is possible and many do it but I think is max size for the axles and run a higher risk than 33's. Aftermarket axles will help a lot. The rear will need 1 pc. axles for sure. But that is my opinion.

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Old 07-04-2011, 02:36 PM   #3
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What axles would you suggest? Itll be my dd but I go in the woods every weekend.. Id like to have 35's but id settle with 33's .. I want positive traction too cause I hate that about my yj
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Old 07-04-2011, 03:11 PM   #4
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Originally Posted by fmhyj
What axles would you suggest? Itll be my dd but I go in the woods every weekend.. Id like to have 35's but id settle with 33's .. I want positive traction too cause I hate that about my yj
I have a cj7 with the factory axles. I am running 33s but may go to 35s. Similar situation to you.

Dana 44 are awesome but if you are like me and on a budget I'd look for a set of axles already setup. I got a set with 4.10 gears and a rear locker and better rear axles for $600. I installed a Aussie frt locker so I'm setup for under $1k. There are sets like there out there just have to be patient. Beats $2k in gears and lockers alone.

I'd say run the factory axles and buy a set of extra axle shafts for those bad days. Save some money to upgrade later. Just remember what you got when you hit the trail. They will last if you do.
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Old 07-04-2011, 03:29 PM   #5
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Hey I appreciate ur advice! I'm buying this week.. 500 is what I'm giving for it.. it has a hard top and hard doors too. it has the 6cyl in it.. it was running a couple years ago I remember.. and the carb needed to be rebuilt so she parked it.. it won't take much to get it going... and tires and dry rotted now.. so ill buy cheap used tires for now... I'm super excited to have a cj again!!
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Old 07-04-2011, 03:32 PM   #6
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Hey I appreciate ur advice! I'm buying this week.. 500 is what I'm giving for it.. it has a hard top and hard doors too. it has the 6cyl in it.. it was running a couple years ago I remember.. and the carb needed to be rebuilt so she parked it.. it won't take much to get it going... and tires and dry rotted now.. so ill buy cheap used tires for now... I'm super excited to have a cj again!!
Cool. Great price. Top and doors are worth that.
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Old 07-04-2011, 11:24 PM   #7
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now as far as a lift i see you have a yj lift... what all is required to change on the frame to run that lift? and what are the advantages?
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Old 07-05-2011, 06:28 AM   #8
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now as far as a lift i see you have a yj lift... what all is required to change on the frame to run that lift? and what are the advantages?
The advantages for me to run a YJ lift is a better ride and more spring selection. I wanted to run OME and they dont make much for CJ's. The front springs are 1" longer and a 1/2" wider. This makes them the same width as the rear. I have not gotten to drive on the highway but it will ride much better than my rough country 4" lift I use to have.

Changes:

Rear: None! YJ and CJ have the same size rear springs. I recommend replacing things like spring hangers but not required.

Front: Move the front spring hanger 1 hole forward. You have to drill a rivet out on the frame and move the spring forward. Also have to buy wider u-bolt plates since the springs are 2 1/2" vs stock 2".

4wd.com and Quadratec both sell YJ conversion kits that come with all new stuff. Going to what I did is not the cheapest by any means but I got what I wanted.
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Old 07-05-2011, 07:12 AM   #9
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as stated swap in some 1pc rear shafts, and check the condition of the front hubs. 33-35 tires will work. 83 will have the wide trac axles. T-case should be dana 300. Though its really a trade off between the yj and cj once you start comparing what you have to do to each of them.
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Old 07-05-2011, 11:57 AM   #10
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so is a stock cj7 a true 4x4?
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Old 07-05-2011, 12:57 PM   #11
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so is a stock cj7 a true 4x4?
By 4x4 I think you mean all 4 wheels spin.

I do not know of a single production vehicle that comes with front and rear lockers from the factory except the rubicons.

All the cj's I have ever messed with have open front axles and either open or limited slip rear axles.
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Old 07-05-2011, 02:00 PM   #12
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Inregard to cj and real 4wd"
Perhaps you are thinking about locking the hubs in vs a locker. the hubs just make it so you can get power to wheel vs. free wheeling.
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Old 07-05-2011, 06:15 PM   #13
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I'm not understanding this.. I'm still young and only been a jeeper 2 years.. So even if it has lockers that doesn't mean they will spin at all times when in 4wd? And What is open axle?
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Old 07-05-2011, 07:12 PM   #14
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Quote:
Originally Posted by fmhyj
I'm not understanding this.. I'm still young and only been a jeeper 2 years.. So even if it has lockers that doesn't mean they will spin at all times when in 4wd? And What is open axle?
I'm sure there are people on here that can explain this better than me but I will try.

First off the "locking" hubs on the front axle only engage that side of the axle to accept power.

Open differential. Only 1 tire spins and usually is the one with least resistance. Not good if 1 tire is in the air.

Limited slip differential. 1 tire spins causing the other to start. Most common differential in vehicles. Still not turning both tires 100% of the time needed.

Locking differential. Both tires spin when power is applied. Examples detriot soft locker, Aussie locker. These are automatic lockers. Some are mechanical some are clutch. Electronic and air lockers are popular as well. These use air to force engagement which makes the axle feel as though it has a spool. These are great because they can be turned off when not needed. This leads to the next type.

Spool/mini spool locks both wheels mechanical. Not very nice for road and hard to turn. Used in drag cars.

Lastly is "Lincoln" locker. This is welding a open differentials spider gears together to lock wheels. This is done but I don't recommend.

If you have true lockers all wheels will spin.
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Old 07-05-2011, 07:55 PM   #15
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So even with lockers and both of them turned to the lock position with the tires in a bind both will or will not move? Sorry I'm not comprehending this
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Old 07-05-2011, 08:06 PM   #16
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So even with lockers and both of them turned to the lock position with the tires in a bind both will or will not move? Sorry I'm not comprehending this
No problem. This is the place to learn. Other forums would have had a a$$hole come by and well be one.

The turn lockers refers to the type of differential inside the carrier/pumpkin.

What you are calling lockers is commonly called locking hubs. If this is still confusing pm me and I will send you my cell #.
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Old 07-07-2011, 12:15 PM   #17
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I do not know of a single production vehicle that comes with front and rear lockers from the factory except the rubicons.
The Dodge PowerWagon comes with lockers and a winch from the factory.

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Old 07-07-2011, 12:32 PM   #18
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Locking Hubs are different than lockers. With locking hubs, if they are not in the locked position, your tires are the only thing spinning on the front axle. If you lock them in, it connects the wheels to the differential allowing them to receive power in 4wd. However, this does not mean that your DIFFERENTIAL is locked. If you only have locking hubs but no differential locker, and get a tire in the air you will only receive power at the tire in the air but not to the tire on the ground. If you have locking hubs AND a locking differential, your tires will spin at the same speed no matter what.

Think of it this way. Jack up the front of the jeep with locking hubs, make sure both tires are off of the ground. Unlock the hubs. Now if you go to one tire and spin it, it will only spin that one tire, not the other one. Now lock the hubs. If it is an open differential and you spin one tire, the other tire will spin the opposite direction. While the tires are spinning, have a friend pick a tire, and hold it. Now his side is not spinning, but you can still spin yours. If you were to lock it with, say an ARB, and you would not be able to hold one tire while you spin the other...both tires would have to spin at the same time.

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