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  #71  
Old 03-24-2018, 05:43 PM
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Towing this trailer on cruise control 60 mph the average mpg is 15 (between 14 and 16 mpg).

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  #72  
Old 03-25-2018, 10:39 AM
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The biggest 2 advantages of the Execuhitch (which I like) are (1) cosmetically clean, (2) no ball mount receiver rattle/clunk. But if you want a system that is compatible with standard American-style 2" receiver parts then you should go with something else (OEM is pretty good and cheaper at around $425 for the whole package). with a bit of reinforcement you can use a WD hitch (if you don't have rear self-leveling), or a tongue weight scale integrated into the ball mount (great if you tow a variety of loads/cars).

I chose to go the latter route, but regret not cutting off and redoing the loops for the safety chains because they prevent you from using those cheap devices to eliminate receiver clunking. I usually leave a cheap ball mount in there when I'm not towing, as this greatly reduces the amount of rear bumper damage you will get from park-by-feel drivers in parallel parking situations (often here in Boston). I'm one of the guys that did a very tight cutout of the bumper, so it's visually not a big deal. Besides it's a utility vehicle and I think a hitch is part of the look.
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  #73  
Old 03-25-2018, 12:04 PM
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What reinforcement you can do to use a WD with Execuhitch?
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  #74  
Old 03-25-2018, 01:26 PM
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Quote:
Originally Posted by bono View Post
What reinforcement you can do to use a WD with Execuhitch?
I've got an OEM. the drop arms should be reinforced, and some folks add a torque arm that attached just aft of the rear differential.

I don't have an Execuhitch.
Sorry but I can't help you. Just call them and ask.
The only reason to go with a WD is if you plan on having a LOT of tongue weight AND you don't have self-leveling or aftermarket airbags inside the springs.

If you keep it reasonable (under 400lbs), you should be fine. Anything above that and the extra weight becomes noticeable in the steering and handling. The only time I felt WD was really necessary is when I was towing a trailer with over 1000lbs of tongue weight.
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  #75  
Old 03-25-2018, 03:43 PM
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Sorry, I thought you were referring to reinforcement of Execuhitch to use WD. I reread you post and this was my mistake. I have OEM hitch and have Can Am type of reinforcement. My tongue weight is between 700-850 lbs.

Just one remark - self-leveling or aftermarket airbags do not transfer the weight. Therefore, if you have significant tongue weight, you want to use WD, regardless of the suspension.
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  #76  
Old 03-25-2018, 06:33 PM
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Quote:
Originally Posted by bono View Post
Sorry, I thought you were referring to reinforcement of Execuhitch to use WD. I reread you post and this was my mistake. I have OEM hitch and have Can Am type of reinforcement. My tongue weight is between 700-850 lbs.

Just one remark - self-leveling or aftermarket airbags do not transfer the weight. Therefore, if you have significant tongue weight, you want to use WD, regardless of the suspension.
That was my point too. But air bags or self-leveling are still nice to have.
If I needed to go over 600lbs on the tongue, I'd have my OEM hitch reinforced an get a WD setup. When I towed that monster trailer (over 1000lbs on the tongue) it was equiped with WD. Otherwise no frickin way it'd be safe.
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  #77  
Old 03-25-2018, 07:44 PM
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WD on a unibody? How is the weight transferred to the front, there is no ladder frame?
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  #78  
Old 03-25-2018, 08:28 PM
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Unibody is stronger than body-on-frame. The most challenging part are the mounts point for the hitch. Many unibody manufacturers require WD to achieve full tow capacity.
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  #79  
Old 03-26-2018, 12:08 AM
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Quote:
Originally Posted by bono View Post
Unibody is stronger than body-on-frame. The most challenging part are the mounts point for the hitch. Many unibody manufacturers require WD to achieve full tow capacity.
I don't know that this is true. Depends on the vehicle.
I'll bet an F350 is stiffer in bending (fore aft) than an E70.

The point is, WD works if there is any longitudinal stiffness. But of course, the stiffer the better. BMW unibodies are generally very good on bending stiffness. I took my E70 to a CAT scale once with the big trailer and WD hitch. The WD was putting an extra 250-ish lbs on the front tires and taking about the same amount off the rear tires.
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  #80  
Old 03-26-2018, 12:25 AM
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There is even youtube videos showing this - no problem with opening doors / tailgate in X5, when the car goes off road. Truck frames are flexing in similar situations. This is pure engineering, any car engineer will tell you that unibody is more rigid than body on frame.

Quote:
Originally Posted by bfeng View Post
I don't know that this is true. Depends on the vehicle.
I'll bet an F350 is stiffer in bending (fore aft) than an E70. (...)
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