car troubles please help!!!

[VPS2]

ok about 4 days ago my car was put in for a service about a day before it went in for the service it wouldnt start in park but would start in nuetral so i started to trip balls really bad so wen it went in for a service i told him and he sed that he put in a new nuetral starter switch i think it was and it now starts in park but last night i went on ACC and my car was blowing a shit load of smoke was coming from underneath my car i thought maybe it just needed to cool down or sumthin but when i was going home my trans felt weird it wouldnt change gears it would just stay in say first for ages like it would be driving with about quarter throttle n it would rev out a bit this may be normal or sum shit i dunno but it neva happened before so yer thought i might ask so if u might have an idea of wats hapening please tell

[naf33n]

man use punctuation, makes it easier to read


im guessing a transmission line or something similar is leaking on your exhaust(hence the smoke) now you have no oil or very little in your gearbox so it cant change gears easily

pop your head under the car and look for leaking oil

[vtmanualv6]

yeah i also think your trans is low on oil and not shifting properly,
better to get it checked out sooner then later might still be able to save some stuff

[Demon76]

take it back to the guy who replaced your neutral starter switch.