Well thanks ALL for the feedback! It's encouraging to know that I'm not just going crazy - and now I'm sure its the downshift into first. The first time I thought I had a short in the Montana brakes and locked em up.
I'll take it in the Dealer - due for oil anyway. Once it's fixed I won't be afraid to drive it with my false teeth in again
Steve - is TSB a Safety Technical Bulletin? Just thought I would talk to the Dealer about it.