I have a 96 Vw Jetta. I'm having problems with 4th gear. It shifts a little hard from 1st to 2nd, fine into 3rd, and will go into 4th. As soon as pressure is applied to the gas pedal to speed up, it slips out of 4th gear, (kinda like it won't downshift to 3rd). If you let off the gas pedal it will catch 4th again, but again if you apply any pressure to the pedal it will slip right back out. It used to be an intermittent problem but lately it does it all the time. Changed the wire harness, solenoid, TCM, and the plastic plugs in the valve body. When I recently replaced the TCM it seemed fine, but we had to drop the pan and fix a leak in the pan and ever since then the 4th gear issue has been an everyday occurance. We've tried scanning for codes, but haven't come up with anything on the tranny. It is NOT in limp mode. I'm on the verge of just taking a baseball bat to the car. Any help would be greatly appreciated.