selloutstuartjoe

Ok after a fun overnight offroading trip i come back home and when i start up my car i hear a very high pitched vibration noise coming from the engine at idle...then again a tiny bit at high RPM. It goes away after the car is warmed up but sometimes is still audible at high pm....i feel no lose in engine power or anything other than the noise...but what the hell is it. If it helps diagnose the problem, while off-roading, when i was in 4-low i heard a small pop sound then none of my gears would engagne until i put it in 2-hi then back to 4-low. does that have anyhthing to do w/ my high pitched vibration? Anything anyone could tell me would be great. Its a 1991 22-RE
-joe