Shakes or Wobbles problem
1993 Buick Skylark 55,000 miles
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If I drive above 60 mph for a bit (highway driving) then break to about 10 mph the car will begin to shake and then shut off. It happens at tolls or red lights. I have found that it is less likely to happen if I down shift into drive 2 or neutral when I decelerate to 30 mph and finish the stop in that gear. I have recently had a new alternator, cleaned fuel injectors, and a new fuel filter. Please help!

is engine a four cylinder?or six? possible the transmission lock up solenoid is bad.when car is warmd up does it stall when u put in drive?