joe_and_jeep
NAXJA Forum User
- Location
- Pittsburgh, PA
The Victim, 1984 XJ 2.5, 5Sp, NP207/NP207, HP44/9IN, 4.10 gears, 110:1 crawl.
The first transfer case is a stock XJ unit with the 27 spine output. To mod the case for installation of the adapter, take off the 3 bolts that hold on the tail housing. Also your gonna have to cut the front yoke off. Take the T-Case out and remove the chain. Then sorta bolt it back together. You can see where I cut mine just a hair to the left of the check plug. You do this so the driveshaft will clear. When you cut it, (dont know if you can see in the picture) leave the two bolts that bolt the halves together for strength. Thats all the farther over you have to go.
My "Adapter" is a 1/4 in plate of aluminum with a 1.5in hole cut in the center. Your gonna have to drill 3 holes for it to bolt onto the back of the first case. Centered of course. Then get a stock T-case adapter off of a S-10/Blazer and drill 4 holes for that to bolt onto the first adapter.
For the second case I used a NP207 out of a 1985 S-10 Blazer with an auto and 2.8. It has the 27 spline input. The second case will slide over the output of the first case. The output is too long and will bottom out in the input of the Chevy 207. So slide it on as far as it will go and measure how far it needs to go and cut that X amount off of the output of the first case.
Now the second should bolt to the rear of the first case. (IF your adapters arent centered then it wont bolt together)
Also your gonna have to build a second cross member for the second case. I built mine out of 1.5in .120 square tuve with a notch cut out for the front yoke of the t-case and plated with .5in steel. The front cross member your gonna have to make driveshaft loop because your front shaft is pointing straight at it.
What I didn't mention -
You'll need to make a block off plate and seal it for the first case cuz now you got a big hole in it.
Driveshaft length will be custom
Motor mounts, your rig will destroy the drivers side because of the gear reduction. Go solid or run a torque chain with a turnbuckle for a slight preload.
RTV and silicone are your friend.