My accent came up error code p1529 corrosion and I just replaced the tranny speed sensor and tranny 3 months ago shift fine clear till I get to bout 65 then rpm keeps going up past 3

Have the TRANSMISSION MODULE scanned by a professional 'mechanic' with a professional scanner!!!...P1529 simply means there is a problem with the trans!.. Got to have the proper equipment and expertise to do testing!... Zone does not have either, that is a parts store!! AAMCO may test it free of charge.