Mazda 3i 2.0 2007 automatic transmission problem need help
 

I was driving on a highway going right about 90 to 100 . Well I was using my manual mode I noticed I try to switch to 4th gear it would not .. the AT light was on and I pulled over I turn the car off and quickly check my tranny fluid it was good and I went to my manual it said that AT means electrical problem so I drive my car home. Going 45 on a 65 with hazard on for good 30min and. Begin searching on the forum ..

most people say that it could be the speed sensor which I already replace and did not fix the problem so I went to the 2nd possible problem TCM however when I'm trying to work on today it was not on the top of the transmission like everyone said on forum . Well me I tried for hours to find it there was multiple site that I look at some saying it's inside the dash but could not fine it... i

i would appreciate if someone would help if they have the simillar problem with their Mazda 3i 2007. I believe that the tranny set up is different because the TCM is no where to be found ... it's been 3days I've been searching but no one makes a video on YouTube or most cars are 2.3 on the forums and it's different tranny . I hope it's nothing big .