Hi. I have a 1988 Toyota Corolla 2-door Sport Coupe. It has apx 212k miles on it. I have gradually been experiencing a lurching or jerking that has been worsening over time (over a year), but when I take it to the dealer, the car doesn't demonstrate the problem so they said they couldn't do anything about it. It can happen in any gear (manual transmission). A lot of times it happens in first gear. Other times it happens on the highway, sometimes it's very subtle, other times it kind of scares me. A few times, I have heard a very loud "clunk." Other times, the stick shift actually shifts like when you take your foot on and off the gas, but this happens when I keep my foot on the gas. It has a carburetor, no fuel injection, no computers, nothing fancy like that. Any ideas on what might be wrong? Thanks!