Series 60 were used a lot in the production range I was searching 2000-2007. I think Cat was sometimes installed but later it became more common.Quote from: luvrbus on July 01, 2026, 02:41:52 AMSlides are a game changer, me personally I will never buy another RV without slides but I do think 4 slide are a over kill. I fought slides for years with my wife before giving up saying she was right. Installing slides in a bus unless it is a Eagle is cost prohibited Gary at B&B Coach in Vegas did slides for around $3000.00 a foot unfished, but he never would do a MCI. A 12 ft slide would cost you 50 + grand now. For another 50 grand you can buy a Prevost with factory slides and a series 60.A good friend of mine has the only MCI that they ever made with a slide his is a MCI J model, he has for sale asking $345,000.00.I am looking at Newells with C-15 Cat but all I can find with the Cat C-15 are equipped with the funky 10 speed Z/F transmission and I don't want the Z/F transmission