Problems with movement in park

Right, but the parking pawls ratchet when going at speed, and I wouldn’t consider a slow skid would be considered speed, but I will definitely take that into consideration. I’m glad that someone actually put something other than stuff about the parking brake, so thank you.

 

Everyone keeps saying stuff about the parking brake because that's how you prevent this from happening. From page 162 of the OM:

On vehicles with an automatic transmission, always apply the parking brake, shift the shift lever to P, stop the engine and lock the vehicle.
Do not leave the vehicle unattended while the engine is running.
If the vehicle is parked with the shift lever in P but the parking brake is not set, the vehicle may start to move, possibly leading to an accident.

 

Point made, thank you for informing me.

 

No worries dude. Hopefully I didn't come off as dickish.

 

No, you didn’t actually, I just appreciate your erudition. Thank you.

 

I've slammed many a rental in park while pulled into parking spots. You'd be surprised at how slow you'd have to go for it to finally lock. Tons of inertia on a tiny little pawl.

 

It slid down because of snow

 

Real easy test: park in same spot, no brake but do it on DRY driveway.
Report back.

 

Wheels have to rotate before that happens. Sliding does not equal rotating lol.

 

I’ve done it on my truck once too, didn’t mean to, but it happened. It didn’t seem to like it much, And I do know that the little Pawl is not designed for stopping the 5000 lb vehicle, but I haven’t had this issue with my previous vehicle. But there are too many different variables to use that as a viable comparison.

 

OP, now you have an excuse to get a bump/winch. You can then anchor your rig at night...

 

Watch closer buddy

 

Doubt this will do anything because it only started rolling after it was sliding, but I plan on moving my truck back into the driveway anyway, so I’ll try it lol.

 

Who knows. Tire compound might even play a factor

 

It’s a taco, not a pirate ship

 

My 1989 Lincoln Town car rolled back about 12' while I was in the mall. Dry day, small grade uphill where I parked.... no brake.

Turned out to be a poorly adjusted transmission linkage, as I had just had the tranny rebuilt.

In your case, I would have the dealer check your...."park/neutral switch" to ensure that it's working properly..... It is on the side of the tranny with a bunch of wires running to it....it's responsible for gear selection, and can be adjusted if it is not allowing full engagement.

Good luck man.... OH, use your brake,..

 

Thank you

 

Use your parking brake. With the transmission in Park it locks the driveline but if one tire looses traction on snow/ice/mud or any other slick surface the truck could roll since the spider gears in the diff can allow each wheel to roll intependently even with the drive shaft locked up. The parking brake will lock up BOTH rear wheels and would force both tires to loose traction vs just one.

 

The rear wheels aren’t rotating, they’re just preloading and releasing thus giving the illusion of rotation, that coupled with awkward angle of IR security camera and shiny polished spokes on the wheel is why you’d think they’re rotating, they’re not. Fronts are.