When is it OK to run 4 wheel drive either for the NP205 and NP 203 with part time kit. I ran my NP 203 with part time kit across the stateduring a snow storm many years ago. Parked it for a week and when I hit reverese the t-case chain slipped on the sprokets. I put in a NP205. So I can't run full time 4x4 on pavement I guess. Is off-road dirt the only place to run it full time. I thought about fixing my NP203 and going back to full time.