i originaly bought this car to restore but divorce forces me to drive it , ONLY at 20 miles an hour 1500rpm i feel the car is jerking , feels like tires are out of balance badly but tires are ok no bent axles and feel it in 4 gears cant do 5th doing 20mph ONLY when i push in the clutch it goes away , at higher speeds i feel nothing .what gives bad something please help. also please read my other posts i need answers thx