Rep Power: 0

My Daughter has a 2001 Honda Civic EX 1.7L V-tec (123,000 miles) that just recently started vibrating and shaking when at a stop light but only while in gear... as soon as you put car in neutral or park or pull away she is fine... any ideas what could cause the car to do this?? All major maintenance has been kept up and 2 vacuum lines replaced ... Local yocal mechanic is stumped, he had the car for 2 weeks and has no clue what might cause this ... I need some help in a major way.. thanks for any suggestions!

 
Rep Power: 290

If a that mechanic had it for 2 weeks, and can't figure it out, it's time to take it to another mechanic.

If you're not overfilled or underfilled with fluids, and the mechanic has checked most major issues, my best guess would be that your motor mounts might be deteriorating and failing.

How bad is the shaking?