Rand McNally TND-740 magnet mount.

I use the 540 no magnet mount on it. If size don't matter to you lol.

 

Can only speak for my experience, mine hangs in mid air off the dash lip on a T680, nothing anywhere to help hold the screen onto the magnet mount, and never had it fall off yet.

Even bouncing down 20 thru Shreveport last week didn't knock it off. Been there about 6 months now.

 

I have their higher-end tablet products, which also use the magnet mount. The older 8-inch tablet, they sell a rubber casing for, which offers some protection if the tablet falls off of the magnet. I also use the power and audio connectors - if the device falls off of the magnet, the connected cables will catch it, or at least break it's fall.

In fairness, though, the only issue that I have had with the magnet, is when initially mounting the tablet to the windshield. During this procedure, I have the tablet attached to the magnet, so that I can position the suction cup on the windshield in an appropriate location. If the suction cup fails to stick well, the whole arrangement may fall to the dash, and this is where the tablet separates from the magnet, and then falls to the floor, and out of the open door onto the pavement, cracking the screen. Don't mount the tablet while the door is open - that helps. Put a drop of water on the suction cup - that helps it to stick to the windshield. And if possible, don't put the tablet on the magnet, until the base is securely mounted to, and positioned on, the windshield. This can require a good eye.

If you are OTR, you shouldn't have to mount and unmount the base very often. If the water sealing the base to the windshield freezes, you might have to remount to the windshield, but other than that, you should be okay. I slip-seat, so I have to go through this, every day. Sucks to be me...

 

I have had the RM740 since august. At first I had the mounting box gripped in a phone mount. It fell off once or twice. Then I used windshield suction cup mount in center of windshield and The RM740 sitting on top of the dash. It never falls off. Never.

 

I would worry about slamming the door causing your GPS to fly off the magnet mount if it's attached to driver side window.
A "kludge" would be to add extra magnets added to the mount, if you want to pull the GPS from the mount. Although being that close to you, you may not need to remove it from mount. These "rare earth" magnets are cheap and available on eBay for maybe $1 each. You have your choice of square, rectangle, circular, and various thicknesses. They are STRONG. I bought 10 or 20 in a pack that are 1/4 inch by 3/4 inch and I can barely pull them off the fridge door unless I pull the paper they are holding on the door. These are not typical fridge magnets that barely hold a piece of paper on the door.

The mount is square, but similar to a hockey puck. You can gorilla glue a small L-bracket to the mount and gorilla glue or super glue a magnet on the back of the GPS. Or you could use L-brackets on the mount and Velcro on the back of the GPS.

Another method is mono-filament fishing line, with a short bungee cord on the back side of the mount. The fishing line would be over the screen and the 6 inch bungee would be pulling the fishing line tight from behind the mount.

Now that I think about it, you could probably use a drop or 2 of red Loctite between the mount and GPS. It's nearly permamnet for daya to day use, but a little force and the red Loctite breaks free. I guess it depends on how often to need the GPS to come off the mount. I take my GPS home when I go home. So I need it to be temporary on the mount.

 

I wouldn't recommend this on any suction-style mount - or really, any kind of removable mount, at all. The stresses on the structure of the mounting bracket, and even just the vibrations during opening and closing of the door, on the electronics... most of this stuff is made out of molded plastic. It just can't take that kind of force. If you can't mount it to the windshield, the next best solution probably involves velcro on the dash. These things are designed to mount to the windshield... if that isn't going to work for you, then you might want to get an app for your phone, put your phone in an Otterbox Defender case, and roll the dice with a less-than-optimal mounting arrangement, with that. At least if that falls, the Otterbox is likely to protect it...

 

Or if you have the 740 you can always call in to RM CS and ask for the upgraded Slice (Magnetic Mount)

As for Traffic it is free now. Since the TND-720 the traffic went to Internet based. The first year TND730's you had to pay for traffic, but now it is free. This has been about 3 years now.

Tablets - you have to create an account with the RM Market (Apps) and then download traffic.

Mark

 

Never had a problem with the suction mount that The 730 comes with. I’ve had this one just about 4 years. I gave up on RM’s power cords and just use a generic cable I bought at the Pilot. Otherwise no problem with the unit. I keep a short bungee attached to it, to catch it, should it ever fall off. Haven’t needed it yet.