I recently bought a 2000 Chrysler T & C Limited from a used car dealer. Of course, when my husband and I both test drove it on 2 different occassions, for approximately an hour each time, it ran like a dream. So, about 30 minutes after we bought it, it started acting up. PERFECT TIMING!! When you get up to about 50 mph, it shudders a bit and then kicks on up into high gear. I looked up similar instances on this forum, and seems as though there is a "speed sensor" that can cause your car to go into "limp home mode" and make it do this. So, I took it to a local mechanic and he initially said to me that it sounded like a bad "speed sensor", until he drove it. Then he said he believes it is the torque converter going bad or the switch inside the torque converter. He says the torque converter is locking up and keeping it from going into high gear and then when it unlocks is when you feel the shudder and then it kicks on into high gear. He says I will have to have the transmission taken completely out to get to it and that a bad torque converter could also possibly mean I may have to have my transmission rebuilt or buy another. Does this sound correct? Should I pursue the "speed sensor" thing or does it sound like the torque converter?