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I of course agree that trucks have a wide range of ratings because they have an almost dizzying array of configurations of engines, axles, gears, etc.
As for leveling, it is not the same as weight distribution. I'll see if I can find the YouTube video of a test/demo of this that I saw using both methods. Without the weight distribution physics, all of the weight remains on the rear axle - even if it is now level. With a WD hitch, some portion of the hitch weight will have shifted to both the front axle and the trailer axles. Leveling is actually a side effect of weight distribution. Whereas weight distribution is not a side effect of lifting the rear end to make the to vehicle level. Leveling with air is not bad, but it is not the same thing.
Actually, here is the YouTube video link.
If in fact the new Discovery comes out with 7700 lbs I will be all the more disappointed with JLR. Not changing the number suggests that they have not done the SAE certification. This SAE certification for towing capacity was introduced about three years ago and has been adopted by a number of manufacturers. Here is a good albeit somewhat dated article on this new rating criteria.
http://www.trucktrend.com/news/163-0910-truck-towing-capacity/
Now to be clear, if you are towing a lighter weight trailer (3-4K#, etc.) with an LR4 I can't imagine you need to be concerned about all this stuff. For heavier trailers a safe hitch (meaning one rated to the appropriate tongue weight, etc. - whether you go anti-sway and/or weight distribution is up to you) system is important.
Another note on towing with an LR4 (and any vehicle with a good departure angle which I hope the Discovery will have) is that there is an advantage to having the rear axle closer to the hitch location on the vehicle. This often comes up on trailering forums where many will declare that you shouldn't two heavier trailers with an LR4 (or LC or likely the Discovery) because of the short wheel base. These people typically state that you should use a proper, longer-base, truck with the tow package. They have a point. But the LR4 and LC and presumably the Discovery have the hitch receiver closer to the rear axle so there is a "shorter lever" that might "lift" the front end a bit. That is good for the LR4 provided you are safely within the Gross Axle Weight for the rear axle.
Good points and good to hear from you, @Finlayforprez. FYI, I've been enjoying your IG feed and all the recent photos of your LR4 in New England. Good luck with the house closing.
ACK! 0:22 into the video...a horror I had not even planned on!!! The middle second row seat no longer folds flat independently on it’s own! The damn thing is attached to the driver's side 2nd row.
It looks like it does the "arm rest fold down" option, but you will not have bed space at the same level as the rear.... maybe some of you don’t understand the significance, but my car always has the two outside seats up (usually with baby seats in them) and the middle one flat. I slide surf boards and cargo in and out of that middle section. The dog crawls back and forth. Trips to the hardware store often don’t even require me to fold anything down. I just slide it in on it’s side. ***...
Did the designers of this thing even use an LR3/LR4?!?
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