2016 BUICK LACROSSE Power Train Problems

Cars shudders 20-30 MPH. Started last year, I needed to get my wife for cancer treatments. Basically, shifted the car manually.

control module,left and right rear wheel speed sensors

When braking from 50 mph or 40 mph coming to a stop my car jerks and it’s very hard to stop it uncomfortable hesitation, Jerk, or lurch. Almost caused accident twice where I couldn’t stop the vehicle this is very unsafe for me and my family also transmission downshifts and up shifts are really hard in this vehicle

AT 25 - 30 MPH AND AT 45 - 50 MPH THE CAR SHAKES VIOLENTLY. I TOOK IT TO THE DEALERSHIP FOR A DIAGNOSTIC. THEY SAID THEY KNEW EXACTLY WHAT IT WAS. I NEED A NEW LOWER AND UPPER TRANSMISSION. THAT IS THE RECOMMENDED FIX. THAT IS SOMETHING THAT HAPPENS TO CHEVY TRANSMISSIONS AND THE COST IS $5400. IT SEEMS TO ME THAT IF THIS IS SOMETHING THAT GOES WRONG ALL THE TIME, THAT'S A PROBLEM THAT I DID NOT CREATE. MY VEHICLE IS WORTH LESS THAN THE COST OF THE FIX AND I STILL OWE MORE THAN TWICE THE COST OF THE FIX.

WHILE DRIVING AT HIGHWAY SPEEDS (65+ MPH) THE INFORMATION CENTER WILL DISPLAY 'REDUCED ENGINE POWER' AND CAR WILL DOWN SHIFT AND ONLY REACH 45 MPH. CAUSING CLOSE TO REAR-END CRASH. YOU HAVE TO LEAVE THE HIGHWAY TRAFFIC IMMEDIATELY AND TURN OFF ENGINE. RE-START ENGINE AND CONTINUE DRIVING. IT HAS HAPPENED TWICE NOW. SEEMS LIKE A SOFTWARE PROBLEM. *TR