transmission problems 2000 galant

i tryed taking my car down a flooded road and well it didnt make it. afterwards i had tranny problems i had it flushed and fluid changed. it makes a weird sound going into i believe 2nd gear and shudders at 3rd and 4th. i had the tranny swapped out and that didnt fix it( 950 dollars later aaaahhhh) so could any one pleaseeeeeee help me. im a female with not any knowledge of these problems thanks so much

Did you flood the passenger compartment? If so, you may have flooded the transmission control unit, or damaged some other electrical component. Just a guess.

Did you flood the passenger compartment? If so, you may have flooded the transmission control unit, or damaged some other electrical component. Just a guess.
The passenger side had about 3 inches water in it. But completely flooded it no. Do you think the moisture from it sitting there could have still done the same damage? Thanks Juelle

I think it's real possible. One time I bought a car which has some real problems trying to run from a lady, and she just happened to mention that she ran the car through the car wash with the windows down. Sure enough, I took out the ECU from under the passenger seat and poured water out of it! It's not related to your 2000 Galant, but the story has the same theme. I would suspect your Transmission control box or your ECU. I'm not familiar with your car, so I can't tell you where to begin.

Another thought.... Water is also in your wiring harness connectors, which in turn has lead to corrosion and bad connections. It probably just a bad connection. You need to disconnect things and look for signs of moisture or corrosion.

Thanks so much for all the input/ideas. Where abouts is my wiring harness, is it easily gotten to, so me/myself could look at it? Oh and I wanted to mention it really dont start acting up until car is good and warmed up? If that means anything.