So I have done some research and it sounds like our transmissions basically suck lol. But anyway, here is my situation. I have a 2006 Monte Carlo SS and when I am on a hill it will want to slide back almost as if it were a manual. It just does not want to hold it's ground when on a hill like an automatic should. Is this just because it is front wheel drive? or could my transmission be starting to go? My car still shifts great. I had a 1996 thunderbird and I rebuilt the trans in it and my monte still shifts better now then that car did when it was rebuilt (and that car shifted pretty damn good). so I have no clue what is up. I would think if the trans would be going I would be able to tell by the gears.

 

R u saying it rolls backwards with no throttle applied?
Isnt that why theres a break pedal?????

I dont get what your asking????

 

yes it rolls backwards. Any automatic transmission car/truck I have driven even when on a hill will try to hold its ground a little bit even when your foot is off the brake pedal. And I'm talking about fairly small inclines where the car just from being in drive should stay in one spot, and not roll backwards. Hopefull that makes a little more sense

 

If it holds in gear pointing uphill.
Its idleing to high!
Its normal to wanna roll backwards...
If you don't want it to roll backwards..use the brake or put it in park.

 

Perfectly normal to roll backwards on a hill. If you have a car that can hold itself, it's not good to do that.

 

As everyone has already mentioned, nothing is wrong with your car. Don't make a habit of letting the tranny hold the car on a hill anyway, it's not great for the tranny.

 

yep, and i notice your other car was a '96
You may be used to that, thats why, sometimes in the early-mid 2000's i believe manufacturers changed trans so they would roll back to save wear on them.

Myself having never really owned a new car i thought the same thing was bad.
I actually called the dealership when my new 2010 dodge van was rolling back on a hill and they told me thats what cars do now.

 

This is really a matter of the torque converter itself. A factory torque converter (everything else being equall) will stall (slip) to about 800 rpms. When the engine revs up above this the torque converter will begin to spool the fluid inside which in turns creates pressure on the 1-2 clutch band moving the car forward. You will have some engagement before 800 rpms, but for the most part full engagement takes place above this. This is why you do not want to sit on a hill and use your tranny to hold the car. It will cause the tranny to wear the 1-2 clutch excessively and overheat the fluid as well.

 

Mine holds but I think it's because my idle is set higher because of the cam, and I make a boatload of torque around that area.