ok, man i dont know how many times i have described my problem on this forum, but i will try to make it clear on whats happening this time. Ok first of all when i'am in gear i notice when i step on the gas slightly my revs go up and the car is moving but the speedometer sits at 0km?The car is diffinintly moving faster than 0km!!!!! its not moving at the same rate as the revs!! the second part is that my idle in gear is 900rpm. Ok now the funny sound when i step on the gas little bit i hear a deep groaning sound. I only hear it from the inside of the car, i reved the car from the throttle lever from the engine bay and i dont hear that groaning sound. What is causing this weird sound??? i only have a downpipe and midpipe as my two mods.

 

First question: Is it auto or 5spd

Second question: Are you "feeling" a low frequency vibration, or are you "hearing" a groan, as you called it.

 

its standard and its a groaning sound