Because , 10 out out of ten so called mechanics don't know crap about the crossfire the S is for 1 through 5 gears the W the car starts out in 2 gear as for in sand or snow but if you floor it in w u will start in 1 gear if lag it could be the conductor plate starting to fail also make sure the elect conection at the transmission is not wet with transmission fluid if yes ,,that plug needs replacing. You could get a tuned TCU that would inprove the shifting. I have a tuned tcu for a srt6 399.00 i want for it.
before taking your car to any mechanic ask the question here and we have good crossfire mech all over the state of fl. check out this list.
https://www.crossfireforum.org/forum...air-shops.html