Does trans fluid wear out

inkjunkie said

Might want to try reading my Duramax with a cheapie scan tool, aint gonna happen. Might want to read here about obdII coverage. Save you the trouble, quoted form the above link.........Since the OBDII standard covers only emissions-related powertrain systems and sensors, there is a lot information you won't be able to see with a generic OBDII scan tool.......I have a generic scanner as well as the one form the above link & it will not read any powertrain codes on our 99 Exploder or the 02 Duramax. Not trying to argue with you, just trying to help.

Click to expand...

True. To an extent. Only P0xxx codes are required by EPA... I've never ever run into ANY vehicle, including Duramaxes, Cummins, or PS on my $150 Harbor Freight scan tool that I can't access the trans data. Granted the data is limited, but it's there. Maybe you have some extremely cheap scan tool I have no experience with. I'd assuse HF would be considered cheap. Especially my nice snap-on ran $3,000+.

Your truck is 100% OBDii compliant, it's required by law. There is absolutely no questioning that, unless it's a pre '97 diesel or pre '96 for gas.