Re: Rebuild your 203?
To adjust the linkage, put the t-case shifter in neutral. Crawl under the truck and locate a small hole in the shifter housing just above the shifter ears. With the shifter in neutral the hole in the housing will line up with the holes in each shifter ear. Use a drill bit the size of the hole and run it through the housing and shifter ears. Adjust the linkage. You will probably find that the linkage has too much slop in it.
I rebuilt my NP 203 for about $150.00. New chain, gasket kit, and new bearing assembly behind the plantery gear. If you are considering a part time kit, install it during the rebuild. However, you can install the part time kit with the case in the truck. Biggest job is getting the case out and in. It is very heavy and at an angle where the weight is not equally distributed. I build a jig and bolted it to may floor jacket. A Haynes mannual does a pretty job explaining the shifter adjustment and tear down of the case. Hope this helps.