Originally Posted by wnytaxman
Now that's a great question and I'll bet that you will have a very hard time finding anyone at a NY DMV who can answer that question. Normally if you have a license of one class in another state it will transfer over to your new state. My guess is that you will only get that question answered at the NY State level in Albany.
Our move to NY was done and I was fortunate enough to go to a small DMV satellite office where the guy running it had the R endorsement himself. It took some time with Albany but he was able to cross my Pa. Class B non commercial over to an R endorsement since the weights and testing were the same. NY is more restrictive as I can only drive an RV over 26,000 lb. whereas my PA Class B allowed me to drive anything over 26,000 that was not commercial.
It was a pleasure to deal with a DMV person that was knowledgeable,patient and courteous. And seemed like a very nice guy on top of it.