I saw a thread about this but no solution . My car (2006 g35 coupe automatic) started having this issue 2 days ago where it shoots around 2-3k rpms and barely moves. Also when I floor it, the car hardly even accelerates. . The car doesn’t move once I let go of the brake when I’m fully stopped, I have to push on gas hard to get it moving. Going up a driveway that’s steep takes a while to get moving. Any help or advice ? I’m taking it to a shop soon if I can’t find the solution.

 

Check your transmission fluid level.

 

Checked it, liquid was brown . Went to buy some trans fluid and changed the old trans fluid with some new. Drove it and it still has the same problem , I noticed that brake tightens up . I didn’t want to risk going over 50 bc of the brakes .