Im confused. Ill be driving in my 98 lude for about a half an hour or so, when all of a sudden Im in first gear hitting 5000 rpms and going about 5 mph. Same in 2nd. I try to accelerate but cant get past at most 20 mph. Idk what it could be. The problem was first diagnosed by my very reputable mechanic as my clutch, so I had it replaced about a week ago and the problem is still there. I havent gotten a chance to tell him yet. In the meantime can anyone think of any other problems this might be. Thanks.