I think my tranny finally gave out (POS). Would someone be kind enough to tell me what code 124 from PORT A1 pertains to? My car goes forward even when I try to engage reverse. Even though the other gears are engaging, it feels like someone is stepping on the brakes when I accelerate. The upshift light never came on to indicate a problem, and there is no check engine light. This all happened right in my driveway about a half hour after the car had been driven a few miles with no problem and no prior symptoms. Went back out to drive the car a half hour later, and when I tried to engage reverse, the car only goes forward with driveability problems. Thanks in advance.