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#431317 - 08/24/08 10:09 AM
Re: Boat launch gone bad...
[Re: Silverbullet]
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Never get out of the boat
Admiral
Registered: 02/07/03
Posts: 6545
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About Something I've noticed around here --and I can't figure it out why people are so stupid--but it's like NOBODY uses their park brake on the launch ramp. I can hear the CLANK of trannys all day around here, and if I'm close to the ramps it's not uncommon to hear (usually the wife) say "I can't get it out of park!"...
Wouldn't doubt for a second that the RV driver did the same thing... On many of these "tow vehicle sinkings", I'm betting using the parking brake is the wrong thing to do. The parking brake works on the rear wheels only - which are often submerged and on the slippery part of the ramp. You want to keep your foot firmly on the brakes - which locks the front wheels - and will keep the boat from dragging the tow vehicle in. I know this first hand. You bring up a good point about the parking brake and how it works. For that matter, park works the same way. I found out the hard way parked in my driveway that was covered with snow. Let off the brake and the truck slid down the driveway in 2wd. I launch quite often by myself, but I don't get out of the truck until the boat is floating. So, I don't believe pulling the truck in is a likely scenario. That being said, I will likely pop it into 4wd just in case. In 4wd, Park will hold all 4 wheels since the t case is engaged. Good reminder. I would wager that during AT LEAST 60% of boat launches, and 90% of boat retrievals, the driver leaves the tow vehicle. This means they're at the mercy of rear-only brakes. I know a vehicle can slide down slippery ramps, I've seen it happen, but never at our ramps. It's rare, and even more so with heavy vehicles with dual rear wheels. Regardless, the driver should make sure the vehicle isn't sliding before he gets out... As for the weight of the boat & trailer dragging the truck down the ramp, anything under water weighs 8x less than on land, so it's unlikely that would be a factor... Concerning 'bullets statement about "Park" holding all 4 wheels when 4WD is engaged, so will the park brake! In 4WD the front wheels won't turn if the back wheels won't turn. Putting the truck in 4WD is great advice, just USE THE PARK BRAKE! Your transmission's little half-inch thick parking pawl was never intended to hold a vehicle on a hill. And--there's a right way and a wrong way to apply the park brake. The WRONG way is to put the thing in park, THEN apply the park brake. Slack in the drive train can still put the full weight of the vehicle on the transmission. The right way is to set the park brake, release the foot brake, insure the park brake is holding the vehicle, THEN put the trans in park. Your transmission will thank you! 
_________________________
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