My 2004 chevy impala transmission WAS act up & rained now the problem away ????
on 2004 Chevrolet Impala

The tranmission barely slips now it rained it seemed to magically went away !!!!!!

That's a good thing,no? I have no clue. Have the fluid checked, may need to be serviced.
I appreciate the reply ! i had fluid change by machine & had fliter gasket trans done I think maybe it's a wiring harass conection Maybe problem i'm guessing not correcting you thanks Sir/// hav good one