I Have 1.8 ,manual 5 spd. Sentra ,For about a month addthe Transmission gets hot I have been unable to shift unitedgeR, only way to get back into gear is to turn engine off and back on while driving...? Have good pedal nol leaks and doesn't seem to have Cllutch slipping , now it will not go into any gear at all .. do you think clutch or hydralics .?