This is kinda long, but hopefully has all the info needed to assess the problem.
I have a bone stock 95 SE ATX with 80K miles that has an intermittent shifting problem. When driving at any speed, although typically when the tranny is in OD, the tranny starts to slip and the RPM's rise. If I stay on the throttle when it slips the engine seems to hit a rev limiter at about 4K RPMs. Sometimes when I let off all is well for awile, but sometimes it shifts randomly into 2nd or 3rd - these random shifts are sometimes very hard and sometimes not. This may continue for a few seconds or several minutes. The problem then disappears and the tranny works perfectly for more than a week and several hundred miles - or the problem may return in a matter of minutes. This has happened in both wet and dry conditions, after only a few minutes from start-up or 30 minutes or more after start-up.
The first occurrance was about 6 weeks ago, the second about a week ago (and several hundred miles), the third was 1 day later, and now the fourth tonight. The check engine light (or any other warning light) has never come on and the engine is running very smooth and strong. The tranny fluid level is good and the color is a nice pink. The fluid was flushed about 6 months ago by a reputable mechanic using the type of machine that hooks up to the cooler lines and does a complete fluid change using the tranny pump (I watched him do it).
I think the problem is electrical, since such a major tranny malfunction from a mechanical failure would probably not be intermittent. I hope it is not due to the faulty wire harness problem - I inspected the wires in several locations under the hood and no signs of dry or cracked wire insullation.
Please help - I hate not being able to trust this thing!
