Yesterday when i was driving home from work i was going about 70 and in 4th gear,, then when i hit the gas my rpm would hop up to4-5 rpms and when i let go of the gas it would go back to 3 but it does go slow like usualy it go up and down fast this is only my 3 gear and up,,, any one have any idea ? and when im in 3rd gear and i hit the gas it goes to 4rpms and then stays there for a few seconds and then goes up idk.