I have a 91 Honda Accord that is in great condition but recently developed a shaking problem. It shakes when I reverse and when I start going past 25 until I get to 35 and then it stops shaking. It also shakes when I sit at stop lights but some days are worse than others. Sometimes I will put it in neutral while I wait for the light to change just to get it to stop shaking so bad but then other days it barely shakes at all. I have been unable to figure out the conditions that cause the shaking....as in it doesn't only shake when it's cold or after it hasn't been used for awhile. Also it seems to lose power when I attempt to accelerate from 40 to 50. It just doesn't want to go any faster and takes a very long time to accelerate up to 50 but once it gets to 50 then it's fine. I'm assuming this is a transmission problem? would it be worth it to fix the transmission? Should I keep driving it until the transmission goes or look into fixing it now?

 

it's an automatic

 

I would inspect the rear motor mount and the other motor mounts as well. The rear one is vacuum actuated to change the stiffness to negate vibrations. It could be a problem with the actuator and/or the mount.

 

Does the engine idle smooth?

 

chk the mounts for sure ( rear ) ,, also chk the tires make sure not a broken ply if shaking happens while driving and under 35 MPH , and as asked.....Is engine running smooth at idle ???? misfire ??