FSJ-10 axles

i think it should be a dana 44 in the front and amc 20 rear. the amc 20 is stronger than the cj amc 20 as it has 1 piece shafts. some will argue that its stronger than a dana 44 because the gear is bigger
 
im about 95% sure its a dana 44 in the front. its the only axle they put up front in a j10 im pretty sure of. Its either a dana 44 rear or amc rear. it the diff cover is round its a amc20 if it looks just like the front cover its a d44. this is of course asuming its stock.
 
You should have the crappy very un-wanted vac disco d44 front axle in the front. AMHIK. The rear should be an AMC 20.

The front cover on the vac disco d44 will be very irregular, even compared to a regular d44. As stated before, the rear cover should be round like a basketball.
 
I dropped some coin and bought a 78-79 Ford Dana 60 snowfighter front axle to replace it, lol which is still sitting in my garage.
 
By "vac disco" I am assuming the vacuum type (what does the "disco" mean?)... dash push-button select-trac??

My neighbor talked about his old school buddy who had an "around this year...when it was new" Jeep when he was younger and his buddy's jeep Cherokee had the select-trac push-button engage...BUT... my 83 has the manual lockers on the hubs, and the little-ass paddle shifter on the floor.
 
disco=disconnect. There is a vac motor on the front diff that slides a sleeve over one of the axles and locks it in.

Not really sure why you would have locking hubs, what transfer case do you have? Do you have a vac switch on your dash?
 
There are no dash switches at all. I engaged the locks on the hubs and used 4 high the other day and it all seemed to work normal (at very slow speed, crawling over a log pile). The 4x4 dash light came on.

The rear diff has definitely the round case as the AMC 20 was described. Maybe a previous owner changed out the front axle, or I just have a different axle installed from the factory? I do not see any vacuum type switches inside the cab, just the little paddle shifter on the floor of the driver side.
 
You need to read the tag on the trans case and see if it is a np229 or np208. With manual hubs and no vac switch it should be a 208. If the front axle is vac disco, you will(should) see a vac actuator mounted to the front pumpkin. Pics right about now would be good.
 
I need to get a digi cam for pics! That's next on my list...

OK, I do have the 208 stamped 6/21/82. (maybe I really have a late manufactured '82 model sold as an '83??). The only connection I see on the front pumpkin is a hose (and only one) connected on the top of it (I can see it as I look down through the engine compartment, and the connection is on the top of the pumpkin, driver side) The hose, from the top of the pumpkin, goes forward towards the steering unit and I can not tell exactly where it goes to. I lose it as it merges with two other hoses on top of the steering unit. Is this a (the) vacuum hose?
 
FSJ10 said:
I need to get a digi cam for pics! That's next on my list...
OK, I do have the 208 stamped 6/21/82. (maybe I really have a late manufactured '82 model sold as an '83??). The only connection I see on the front pumpkin is a hose (and only one) connected on the top of it (I can see it as I look down through the engine compartment, and the connection is on the top of the pumpkin, driver side) The hose, from the top of the pumpkin, goes forward towards the steering unit and I can not tell exactly where it goes to. I lose it as it merges with two other hoses on top of the steering unit. Is this a (the) vacuum hose?
Click to expand...
That is the breather for the diff. Should be mounted as high as possible.
 
you have a 208 case, that would explain the locking hubs.
 
I have a 84 J10 d44 AMC 20 and no vacuum disconnect

running 35's with 4.56 gears no issues with either axle
 
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