The older rangers did in fact suffer in the engine braking department. That's fixed with the 1000's (2018+). The newer ones have a helix in the center of the clutch that springs out when the driven clutch tries to drive the primary clutch (down a hill at idle speed), which puts pressure on the belt and slows the machine down. The Generals still use the older style but they don't freewheel anymore-the ECU increases the engine speed to the point where it will apply a little pressure to the belt and slow the machine. I own one of those, and it's fine. It is a non-issue anymore.
Rhino's used a dual clutch setup. There was your traditional belt drive (CVT) which in itself requires a little maintenance. The primary is full of grease, and once you get dirt/dust/water in the grease, your speed drops from a top speed of 38/39 mph to about 10-12, on the rev limiter. But that's not the big issue. The big issue is the wet clutch (which drives the CVT). Yes it has engine braking, and it works great-when it works. Once the one-way bearing dies (and it will-at some point they all do), it's about a $1500 fix to get all 3 parts, the gasket, 3 quarts of oil, and new grease/bushings/rollers for the CVT since almost nobody services the CVT like they should. In addition, that wet clutch inside the engine, runs on the same oil as the rest of the engine and transmission. So if you're running low speeds, say checking fences, creeping along like you would in a truck, or pulling a load behind you on a lawn cart or whatever, that clutch slippage heats the engine oil up, which can contribute to an overheat situation-in other words they are a little bit sensitive to overheating. They still use this design on most if not all of their side-by-sides. It works, and does what it's supposed to, but it's not completely bulletproof. None of them are really. So really, you're trading one set of problems (supposed lack of engine braking) for another (expense to fix the rhino). I've had 3 rhino's in my lifetime. The newest Rhinos are now 10+ years old, with no telling how many hours, and no telling what kind of maintenance was done (usually none to very little), and a few parts are being discontinued for them. It was a great machine in it's day, but stuff has come a LONG way since then. Also Rhino's don't have power steering and they don't have a way to unlock the rear end, both of which make it a little more challenging to drive especially in tighter trails where you're making lots of turns and such. I sold and serviced 2209 of them from 2004 through 2012 to ONE company, plus thousands more to "normal" customers-including farmers, ranchers, and trail riding individual owners.
Since I'm "in that mood", I thought I'd let y'all in on something else I ran across. Defender 1000. The skid plates, they have to come off to do driveline maintenance and repairs. They are held on with RIVETS, about 400 of them (well I didn't count exactly how many, but it's a LOT of them). Typical, you just drill the rivet head off and pop them loose. Easy enough, except they're (I think) stainless steel and you'll wear out a couple drill bits, and those cheap horrible freight drill bits will dull so fast that you MIGHT get one or two of them drilled off before the bit is gone. Biggest complaint, however, is that once you drill the head off and do your repair, now you have a bunch of rivet boogers stuck inside the frame, creating quite the annoying rattle. Not much you can do about it either. Can-Am really screwed that design up, along with a few other things. Storage boxes are removable-I like that. I don't like the lack of storage under the seats. Battery is a little hard to get to. Electrical accessory install is subpar in comparison to the Rangers' use of the pulse bar--where everything just plugs in. Light bar? 15 minute install using the pulse harness and switch kit. Clean, easy. Can-Am doesn't even come close, they put their accessory connector under the dash instead of under the hood. In fact the HD-10 I am looking at, there is nothing under the hood because there is VERY little room under there, a winch contactor and some wires, and that's about it. But hey it's got a nice big 1000cc v-twin that runs smooth and somewhat quiet so? Again--trading one set of issues for another. But that skid plate deal.....HUGE turn off for me. Ranger skidplate comes off in 15 minutes once it's on the lift. This defender, I'll be into it about 2 hours not counting the actual repairs I have to do with it.
wonky 4x4? Visco-lock. Nothing more needs to be said. Has been problematic and requires maintenance. Way too complicated, pumps, lines, dedicated fluid, etc--just to engage the 4x4. And when it has issues (and it probably will based on what I'm hearing), bend over and don't expect a kiss. Polaris's Hilliard front diff? Been on the market for decades, it works, it's not that complicated, easy to work on, and supported heavily. Polaris, when you engage the AWD (that's what it is, AWD not 4wd), it takes 1/20 of a turn of the wheels to lock. Visco-lok may be 1 turn, or it might not engage at all due to it's complexity. Or it might take 25 turns of the rear wheel to finally engage the front. Could have been a lot less complex and a lot easier to work on but I don't design them. Yamaha's front diff is pretty nice setup where it mechanically LOCKS the drivelines, and when in diff lock, it mechanically LOCKS both front axles together for a true 4wd. I do like that however in the non power steering machines, it becomes impossible to steer them in 4x4 diff lock. Real dangerous in certain situations; which I found out first hand when it jerked the steering wheel right out of my tight grip and broke my thumb. I put power steering kit on it after that, and its STILL tough to steer in diff lock, but a lot better than without EPS for sure. It was a good investment at $600 at the time. The Vikings come with EPS, or more specifically are available with it (you can still buy a non EPS I think). I like most things about the Viking, but I am not a big fan of the cylinder and head design. Overheat them, and get ready to replace the head and cylinder as they often warp and/or crack. The Wolverine 700cc is a completely different engine that doesn't have that issue too much. Just keep the radiator washed out and it's not an issue. On that note, Polaris has a removable grille so you can access most of the radiator to wash it out. Some other brands don't have that feature, so you have to get creative in how you can get access to the radiator with a water hose. I generally don't recommend a pressure washer as it has a tendency to bend the fins over especially on some of the machines where you can't take the grille out so you have to spray kinda sideways.