Need to change shift fork,

1 drain the oil 2 remove bell housing with the release fork
, bearing and hub still attached 3 remove back up light switch 4 remove gearshift lever retainer 5 rotate the shift ro housing counterclockwise and then disconnect the rod from shift shaft 6 unbolt and remove the extension housing 7 drive out the slotted pin and seperate the shift rod, housing and spring 8 remove the front bearing retainer 9 take off both of the front counter shaft covers and the spacer 10 remove snap rings from the input and countershaft bearings 11 remove the intermediate plate 12 when removing intermediate plate, leave all gears and parts attached!! 13 remove speedo drive geer. there are two reverse restricter pins. The pins are underneath the plugs on the extention housing. 14 REMOVE THE STRAIGHT SCREW PLUG/S FROM THE SHIFT FORK/S AND WITHDRAW THE SPRING/S 15 DRIVE THE SLOTTED SPRING PIN/S OUT OF EACH FORK.
16 SLIDE THE GEAR SHIFT FORK SHAFTS BACK AND REMOVE THE FORK/S
this process is for the W series 5 speed tranny other W series trannies use similar procedures.

I hope this help, HAWK

Transmission are kinda tricky. Yes you'll have to take the t-case off. Transmissions won't just fall apart when you break them open. But first things first. What's it doing. And if you don't really know anything about transmissions, I would give it to a shop to rebuild. Won't cost very much.