hey all, we have a hill at a light in town that I noticed the other day the wifes car will not hold itself with just the transmission, you have to hold the brake, if you let off brake it starts to roll backwards. I'm guessing its a 2% grade which I think is like 5 degree maybe. just curious if this is common with these beast lol. I have a Pontiac ssei and 2001 f150 with 256000 miles that holds on same hill with no brake . thanks