As many of you know, I have a Cat 248. It's a 2000 model year and currently has just under 1900 hours on it. I use it as back up and in severe conditions a primary snow removal machine. I bought it before 2 speed units were available and driving it around during a storm between jobs is a drawn out affair. I'm considering trading it for a 2 speed model which would essentially halve the drive time. I'd like to stick with Caterpillar brand but I don't recall when 2 speeds became available and on what models. Requirements would be high flow, minimum lift rating of 2000 lbs and heated enclosed cab. What years/models should I be looking at? Thanks!