pas

Need advice. Did complete flush from return line in tranny 2003 F150. 162k miles original fluid. Used Castrol mercon v. Like title says fluid is brown after 200 miles and over drive light back on. seemed to run good for a few days and I was checking fluid every couple of days color was fine. Checked it tonight and its brown. Thanks

chayes627

I hate to tell you but the trans is proli on its way out.

Martian

Probably flushed out all the gunk that was built up on the discs from the last 162k miles. You can expect chatter now. Might want to go to rock auto and get a rebuild kit.