Black Betty just turned 54K miles and the MM popped a B13 code on the iMID. I know what the codes mean, but this is the first "3" that's been displayed. I've been waiting for the MM to call for a transmission fluid change, but does Honda mean a total flush, or just a drain and fill? If it's a D&F, how much fluid it needed? I do my own oil/filter changes, and will do the trans-axle also if it's just a D&F. I've done the D&F on all of my prior cars with no issues.