Donor MJ

[MJHokie]

Hey all -

I'm just getting into my build and found a donor MJ that will practically get me all set up. I am concerned about a few things that I was hoping somebody can help me out on. This is my first build so I'm learning as I go.

 

My MJ is a 1990 eliminator, stock. All I've done so far is put in new floors.

4.0 AX15 NP231

 

The Donor is a 87 MJ Chief (apparently wheeled only once before a tree fell on the cab in a storm)

4.0 AW4 NP231

 

Here is what the donor brings to the table:

Dana 30 Front: 4.56 gears, lock rite locker, control arm skids, Johnny joints, TJ axle shafts

 

Dana 44 Rear: 4.56 gears, OX Locker complete with cable and shifter (never been fully set up and adjusted), set up for SOA.

 

Suspension: 6 inch bastard lift, 4 inch coils & 2 inch spacers from RE, Adjustable track bar, adjustable upper and lower control arms with Johnny joints (custom made from ¼ steel)

 

NP231 Transfer Case with SYE: possibly teraflex or JB, he couldn’t remember. Not a hack-and-tap.

 

extended brake lines, bumpstops, ect ect.

 

 

I have two questions:

1. I think the 87 t-case is a 21 spline input, my 90 is obviously a 23spline with the ax15. So I know they are not compatible. BUT, can I just swap the SYE from the donor into my 231? it is just the output shaft right, only the input needs to match up with the tranny..? Is there another relationship beyond the tranny and t-case spline count that I need to be aware of before swapping over these parts?

 

2.you guys think this donor would be a good deal at 2k if everything was in decent shape? Any tips on what pitfalls a newbie might miss? I'm on the fence.

 

Thanks guys, I appreacite any help or input!

:cheers:

[MJRemi]

Concerning question #1, I will let those more knowledgeable answer that.

 

Regarding the price of the donor, I think $2k is a high price if you are only after the above mentioned parts. A 87 that was caved in by a tree and with those axles would go for about $500 - $800 in San Diego.

[Jeep Driver]

Swap the complete trans, TC and all.

 

Go external slave if you can.

 

 

You have to judge the quality of the parts.......if nearly new and undamaged.........? maybe a great deal. If it's someone's cobbled up load of crap..........then I guess not.

[Jeep Driver]

don't' know where you are but round here the scrap..........damaged truck plus your left over parts.......all the scrap, will bring around $500 when you are all done.

 

 

This brings your donor cost to around $1500