GEN 2 Slow speed rear ended, damage unknown

[ddpt]

Good discussion by all and it is appreciated.

Maybe the 2020 Raptor will relocate the parking brake near the gear shift allowing its use intermittently while driving.

My previous BMW X5M had this feature and my MB have it built into the brake pedal to engage. In both these cases the vehicle remains in drive while the parking brake is applied. Gives you a chance to rest at stop lights.

I haven't used the Raptor electronic brake in this way because I don't believe it was engineered to be used like the BMW and MB parking brakes.



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[jaggwaa]

First sorry to hear that u got rear ended. Secondly, did u tried the same steps again, park the truck at a slope and see if it behaves the same way as before, if it keeps moving while in park, then u have broken pin, if it behaves like usual on that intersection, then nothing is wrong.
to answer some other questions, in automatic transmissions, always first firmly apply the break until u r completely stop, apply the e brake and then you can release the foot brake and the car should not move, then u put in P.
Once my brother called me and asked his civic 8th gen is stuck in P, gear lever wont move, it was parked on incline surface. Eventually 3 guys pushed it little forward and it came out of P

 

[Daniel Henley]

I disagree. The argument really is when to engage the parking brake. Is it BEFORE putting the transmission in park or after? That is what the argument is. I think almost everyone agrees using it is wise although admittedly in Flat Florida I never use it.

I guess it really depends on your pocket book. Since brakes are a little cheaper than transmissions, I make it a habit of first applying the parking brake to avoid unnecessary pressure on the pin.

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[SilverBolt]

This isn't from the 10r80 trans but it is a good representation of what a park pawl looks like. That little tab is what you are relying on to support the full weight of the vehicle. What typically happen is the pawl wears. That rocking motion you feel when putting the vehicle into park is the tab on the pawl bouncing back and forth in the mating notch. Over time the notch and pawl both wear. It does not take much wear for the notch and pawl to no long fit together properly.

 

[EricM]

Again, I have never heard of an automatic transmission where the parking pawl failed. I see a lot of hand wringing over it, but has anyone ever actually seen it happen?

 

[Oldfart]

Again, I have never heard of an automatic transmission where the parking pawl failed. I see a lot of hand wringing over it, but has anyone ever actually seen it happen?

I have never heard of a pawl breaking but I have seen many times where it feels like your are going to snap off your shift lever to get the trans out of park on a hill because of all the pressure on it. Seems to be worse on cars/trucks with some miles on them. I know I was always taught to park like below.
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Dear Tom and Ray:

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I told a friend that she should use her parking brake before she puts her automatic transmission in Park. I told her that she should do this to save the wear and tear on the parking pawl, and prevent it from breaking. Another friend of hers (who happens to be the General Sales Manager of a car dealership) said that this is the most idiotic thing he has ever heard. We've agreed upon you as our impartial judges in this matter. What do you think?
Michael.

TOM: Well, I think if that's the most idiotic thing this car dealer has ever heard, he obviously hasn't listened to OUR radio show.

RAY: The parking pawl--for those who have never heard this silly name--is the thing that keeps the car from moving when you put the transmission in Park. And your advice is correct, Michael, but it only really matters if you're parked on a hill.

TOM: You may have noticed that when you park on a hill, your car rolls a little bit after you put the transmission in Park and release the foot brake. Then, when you come back, the weight of the car resting against the parking pawl can make it almost impossible to get the shifter OUT of Park. And that's why we suggest you use the parking brake.

RAY: Here's our advice: When parking on a hill, come to a stop with your foot on the brake. Then apply the parking brake. Once the parking brake is set, shift into Park. When you're ready to drive away, do just the opposite; start the engine, put your foot on the brake, shift out of Park, and then release the parking brake. Then you should be able to take off with no problem...and smash right into the Mercedes that squeezed into the little space behind you.

 

[SilverBolt]

Again, I have never heard of an automatic transmission where the parking pawl failed. I see a lot of hand wringing over it, but has anyone ever actually seen it happen?

Yes. Typically on higher mileage vehicles. A few occasions on newer vehicles where there was an issue with the pawl material (bad heat treat). I have spent a few years in the transmission parts business (many years ago) and my buddy currently owns a transmission shop. Most of the failures are just wear.

 

[GCATX]

Again, I have never heard of an automatic transmission where the parking pawl failed. I see a lot of hand wringing over it, but has anyone ever actually seen it happen?

I have. Rock crawling, kid stops jeep on a hill, places jeep in park, gets out to spectate an obstacle, along with others. Jeep comes barreling down hill minutes later, jeep hits tree.

 

[Daniel Henley]

Yes. Typically on higher mileage vehicles. A few occasions on newer vehicles where there was an issue with the pawl material (bad heat treat). I have spent a few years in the transmission parts business (many years ago) and my buddy currently owns a transmission shop. Most of the failures are just wear.

Additionally, police have an issue with failing pawls because they like to slam their cruiser's into park before coming to a complete stop.

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[ddpt]

Update. No damage to the vehicle with the exception of the aftermarket hitch cover.

Dealership (Ford)/Collision Center placed on rack, inspected all parts and at the end of the day, there was no damage.



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