For the past two weeks I have been experiencing some issues w/ my 03 WRX (82,000 m) and was hoping you guys could give a diagnosis. I will describe the issues to the best of my limited knowledge.
My car is having issues in 4th and 5th as I move through the power band between 3,000 and 4,000 rpms. Whenever I WOT at about 3,100 it disengages and shoots up to 4000 flutters for a brief second(like hitting a rev limiter). It then drop back to spooling level and sluggishly moves to a higher rpm. I have no problem driving my car at low rpms in lower gears. It usually moves through the rpms fine when I go through 1st,2nd, and 3rd.
I am not sure if this has to do with clutch, tranny, drive shaft, etc. Any help in diagnosing it and with rough estimates would be great. Let me know if you need any more info.