im assuming that its an automatic,if so then its just because your transmition is messed up,or your rear gears(not the trans gears)are damaged.
clutch is worn out
As your driving steer left and right u will here a baring grind one way or the other
Grown, grasp, green, great, greet, grind, going, grand, grace
probably the cv joint(s). common problem in any vehicle. turning is when you really hear those little guys going bad. if that goes all together you wont be going very far. get it checked out.
bad transmission
if u keep your foot on the gas a little it will grind till u come to a complete stop then it will go into gear smoothly not coming to a complete stop before shifting out of reverse
calf grind their teeth to keep them from going weak it's like you brushing your teeth
bad synco rings
There is no grind area for guildwars, the game is made to be anti grind. But if you are going to grind, do it outside lions arch, this way you can use the Henchmen of the quest insted of the henchmen inside, this way you get all the exp and all the gold.
get into bed and get on top of him, then just kind of grind/shag...quite fun and could end up going all the way ;);) x
Usually if your rear diff is going bad it will start to howl or grind.
Of course it will you idiot. Think about it... while the car is going forward you slap it into reverse and the gears need to stop turning the other way BEFORE the can turn the other way around or it will grind all the gears and then you have just ruined your transmission