The 2000 series are far from your typical MTD rider. Yeah, it's still MTD Corp. MTD has owned the Cub Cadet name for what ~30yrs now, yet they still pump out some great garden tractors based off old school designs.
I owned a Cub 2544. A 2005 model year that was the last of the 3-pc metal hood design. Same as the 2542, just a 3-bladed 44" deck as opposed to the twin blade 42".
They are shaft drive from the engine to the transaxle. The shaft is coupled to the hydrostatic drive, which is bolted to the input of the rear differential. It's a bullet-proof drive system that holds 6qts of oil and has a huge spin-on filter. Basically the differential housing is the oil sump.
They're very tough and comfortable machines. The only issue I had with mine was caused by my own stupidity. I got a front tire stuck in a deep rut and wrenched on the steering wheel too hard trying to get it out. This resulted in a sheared steering input shaft and I split the steering gear case open. This was all easily replaced with used eBay parts. Dealer parts were a bit pricey and had to be ordered, but that's common on any machine today.
This was my 2544. The only reason I don't have it anymore is I gave it to my father-in-law who was in dire need of a 'new' machine. I miss it.
The only issue I have with the 42" deck is it's ridiculously small for this machine. As you can see from my 2544, the 44" barely extends past the wheel base which makes close trimming a pain.
Don't let the MTD naysayers sour you. You never get past one post without someone dropping that bomb. Sure they're not the best money can buy, but I GUARANTEE you, it's the most new garden tractor you will get for your money. My 2544 cost me $2999 brand-new in 2005. An extremely capable machine for the money.
Joel