For while now been having these strange jerk like shifting motions only in the first and second gear. If I keep on the accelerator pedal it keeps going past normal rpm’s and takes while to catch gear then jerks at the shift. But if I let go of the accelerator pedal, which is annoying, it catches gear. Am I looking at a shift solenoid? Is that very common or a whole new transmission since taking it out and rebuilding it will cost more than most vehicles?