Hi guys , I got a question.When I swap the NP242 into my jeep , with it having the ESY , instead of the ISY like the NP249, do I have to grease the hell out of the drive shaft and output shaft inside that rubber boot? I know the internal lubricated itself , but not sure about the external yet.Once it warms up ( it is -38 here for the next few days) <img src="/forums/images/graemlins/scared.gif" alt="" /> I plan to do the swap.The new seals are on the transfer case , I have a new rear seal for the transmission , and I also have the donor driveshaft seeing as it is external instead of internal like the 249.Looking at the driveshaft side of the boot , it seems there was some grease in there.