Okay, I hope some people out there know some stuff about cars. I have a 2001 Hyundai Elantra Automatic with 117,000 miles on it. When I bought it back in November of 04, it was in great shape, and everything still is, except the trans. I bought it for 3400, which was also a steal for all the features it had. Anyway, a few months ago, I noticed the engine would "slip", meaning during shifts, the engine RPM's would go up real fast, yet the car would not go any faster. This continued, until one day I was pulling into somewhere and the when I stepped on the accelerator, the engine would'nt go, and the Check Engine light came on. Crap, I thought. I turned the car off, and back on, and everything seemed ok. (Yet it still slipped.) So, I take it on a trip to NJ, and on the way back, the same thing happens. This time, it stays like that, and I had to drive the whole way home on the highway at 55MPH with the RPM's up in the 3000 because it was stuck in that gear I guess. So, I take it up to Lee Myles transmissions (a national chain), and have them do a "Free Diagnostic Check" on it. After a week or so, the guy says he is 90% sure it only requires replacement of 2 computer sensors, and is not an internal trans problem that would have cost me a few thousand... So, he replaces these sensors, calls back and says he has to add a third one, so I said OK. Total repair cost-- $420. This was back about a month ago. He said the more I drive it, the better it would work because the sensors would "talk" to each other. So, during this month, things have been pretty good. Yet it still slipped I noticed in a few weeks after the repair. Now, I drove to Prom on Friday. The next morning I noticed a delay when I tried to accelerate out of my driveway... It also happened when I went to drive home for my lunch break... and on my way home. I looked it up and it is definitly a documented trans problem (called "morning sickness"). Also, the trans slips pretty bad, and it's about to the point where it was BEFORE I decided to make the $420 decision to have it "fixed". I just have a feeling in the next few days/weeks, the engine will conk out and I'll have the check engine light come on again. There is definitly something wrong.. and I can't afford to get a new/rebuilt trans. I don't know what to do....Anyone help me? ANYTHING would be appriciated... thanks guys.