Sinking Creek 4WD Association

The dana 20 in my cj wont turn the front yoke in 4L. I can drive it in rear wheel, but the front driveshaft does not spin. 4H works as it should, as does 2H. Just 4L only spins the rear yoke. I had the 20 out just to replace a few gaskets and change the oil when i did my tranny swap and it worked previous to pulling it out so i dunno what happened. Im assuming ill have to pull it to fix it cause the linkage seems to be engaging it fine. If anyone has any experience on where to look inside this thing or just has one for sale, your help would be greatly appreciated. Thanks guys.
Nick

Check out BillaVista's D20 builds and tech articles on Pirate4x4:

here's one of 'em:

http://www.pirate4x4.com/tech/billavist ... index.html

yea ive looked through those before. thanks for pointing them out i forgot about em. ill see what i can find.....