I am really frusterated and have been searching for hours about this. Just past few nights Im having issues with first and reverse. When Im trying to just go meaning from a light , stop sign or pulling out a parking space. The car shakes like crazy and making noise from the front I think . Its really a pain to go from a stop. I replaced clutch a few weeks back and tonite changed out tranny fliud and rear diff. It all started I was driving a bit hard but not insane . car in all gears would get to about 4k then just slip and redline. I let the car sit for a few hours and shifts great but 1st is crazy now. any ideas?

2002 wrx 5spd
mods= TBE . perrin Turbo inlet / MAF tube , K&N flilter , JDM v7 sti intake mani /no tgvs , jdm v7 TMIC and a custom tune running 18 lbs

 

I would pull the tranny and check the previous work over again to insure their is nothing loose,,did you change the flywheel?