ok here it is,cat and claas have (had) a joint venture. cat got a combine line, and claas got challengers.They were painted class colors, looked pretty cool to. The tillage tractors, 65 to 95e are built by cat.The early row crop tractors 35 45 55 with serial numbers with a number, followed by two letters and then the rest of the number(1dr0000) are actually ford genesis tractors with tracks and cat engine.these were built in canada at rhe ford factory. they say every third genesis tractor on the line was a challenger. the later row crop tractors (ones with three letters,followed by the serial number(aen0000) are built by cat at the cat factory in delkab,illinois. Now the new mt700 series tractors are all cat. Why did cat get into bed with ford and claasIJ probably to get into these product lines quicker.who do you think makes the new tillage toolsIJ Krause does. whats in the futureIJ look for cat to introduce a wheel tractor soon. Who will they look at for help and needs help distributing a wheel tractor in north americaIJ there are two manufacures they are looking at, one is in germany the other a lower priced one in finland, any guessesIJ .One last thing, the 2002 models of combines are now being made in omaha. in a few years they will be 100% cat. Hope this answers all your questions, bottom line is....caterpillar wants to be a leader in the ag world, as fast as possible, and with a superier product than the competition.