I just got the NP205 in, with a new driveshaft. This is coming from a 203. So, when either going from no throttle to moderate throttle (in low rpms) or from moderate throttle to no throttle, there is a pretty bad knock. Also does it going from park to reverse or from reverse to drive. It does it in either 2H or 4H. Please note that I don't have a front driveshaft on yet. Could this be part of the problem? I'm almost positive it's coming from somewhere near the transfer case. Feels like there is slack there but I can't isolate the problem. Also, it has a rebuilt t350. The new driveshaft has spicer yoke etc. and the 205 has new seals and hardware as well. By the way, there was no such knock with the 203. Maybe it's normal, but it sounds a little excessive to me and I don't want to ruin any of these new parts! Thanks for any insight.