I had my rear end up on jack stands to change out my wheels/tires, the truck was in park, and it didn't take much to get them to roll in the air. Should they do this while in park? I would think not but I don't know.

 

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Yes your tires should spin freely when both are off the ground. When you spin one tire, if the other tire spins the opposite direction or not at all you have an open carrier.
John

 

if in park, and 2wd the rear wheels should not spin, at least one of them, depends if you have an open carrier or not. the front wheels will spin 100% free

in park and in 4wd then the rear is like 2wd and the front should not beable to turn

 

Yea, found out I have an open diff

 

Open diff Yes one tire will spin and the other will go the opposite.

Limited slip, Maybe. My Level II would spin opposite until you kind of jerked the wheel back and forth, then it would lock and not spin.

~HJ

 

my LS will not spin while in park.

 

That's why I said maybe. The Torsen on the 04 would sometimes. The impala with the eaton won't and an old station wagon I used to have would.

~HJ

 

The brakes are in no way connected to or controlled by putting the truck in park. There is no way to activate the front brakes without stepping on the brake pedal.

 

Yeah, hence why I put 'I think'.

 

Maybe you should not think so hard. That statement was so far from reality, it should never have been included as technical advice.

Putting an automatic transmission in park will only prevent the driveshaft from turning. The type of differential will control from there how and if the the rear wheels will turn as has been already stated.

 

my ranger's do, you spin one clockwise, and the other one spins counter-clockwise.

my buddies trans am does it too. which doesn't make sense, cuz you give it a tiny bit of gas and both wheels hook up, ulike my ranger, the one wheel wonder

 

yes, oh, this is funny. my friend was in drivers ed with 2 other kids driving one day. well, the one driving was a girl and she was about to pass someone on the highway, and she was like..ok, how do i pass, and they told her "you gotta put it in 'P', for pass" so she does it hahahahahahhahahahahahaha.

 

How about "R" for really fast.

 

not possible... watch mythbusters, even reverse doesnt do anything to slow the car down....

im almost positive our trucks have a parking pin that locks the gears....


and if both spin in park then park on a hill and see what happens heh...

 

watch mythbusters why what did they do?

My wife used to have a 98 explorer which had the same drivetrain as my 98 ranger. She went from D to P one day and the ex stopped, tires locked up and skidded to a halt. Tranny was never the same.

 

^^^^My GF did that to my blazer, it just made a loud clicking sound (we did stop fast, but the tires didn't lock) I think it is a safety feature on the 4L60E....

 

tried to get a manual trans and an auto to stop/slow down quickly by throwing it into park or reverse.... both were unable to go into park/reverse at something like 40mph

 

They were trying to break the drive shaft not stop the car, I think

 

First mythbusters are not always right. I love the show but they go back and revist myths because they get some wrong the first time. Second not all vehicles are made the same.

My wife was only going 25mph when she did it sooo I guess the mythbuster's test doesn't apply to her situation.

 

Most relatively modern automatic transmissions have some safety interlocks to prevent it from being shifted into reverse while the vehicle is moving over a certain speed. The same thing will prevent it from going into first gear while you're cruising at 70mph.

Park gear on the other hand can usually be selected at any speed. Depending on design, you're either going lock up the wheels or the U-Joints will snap and you keep rolling.

 

my dumb@ss went from D to P once at the mall and it just made the awful clicking noise....total WTF moment for me there.....lol