My 1983 Rabbit convertible went in for its regular oil change yesterday. My mechanic unknowingly used the 5th gear lockout plunger doodad to top off my transmission fluid. Upon leaving the shop I promptly discovered that I no longer had 4th or 5th gear. It went back and after a brief look at my repair manual (which lives in my back seat) my last 2 gears were returned. This time upon leaving the shop I found my car would slip out of gear at higher RPMs. Most noticeable in 3rd, 4th, and 5th. It is not physically slipping out of gear, as in the stick does not move, but if I attempt to accelerate too fast the engine will wind itself up but the car will not respond otherwise. If I let off and accelerate more gently it will stay in gear and accelerate. It is more prone to happening going up inclines.
My linkage is not in the best of shape but it does not appear to be the culprit. I have gone through resetting the 5th gear detent spring thingie with 2 people more mechanically inclined than myself and that appears to be doing what it is supposed to do. I have adjusted my clutch cable which also did not get rid of the problem. The clutch and cable are both new as of the beginning of summer.
I apologize for the rambling story but it is the only way I could figure out to explain my situation. Any insight on what is wrong with my Rabbit and possible solutions would be greatly appreciated.