Help!!! No Speedo And Wont Shift Out Of First!!

hey guys i need some MAJOR HELP HERE...ok i go to leave my house one day start my car and pull out on the road, accelerating normally as usual, but then! i notice very quickly that my car isnt shifting into second...i let off and push the accelerator again and my engine will rev up like the tranny is slipping but then it will catch n start accelerating again but never shifts! All the while my speedometer isnt working either! I replaced the VSS hoping that would cure the problem but to NO AVAIL...I REALLY NEED a quick answer because i am supposed to leave for houston on friday for a new job and i absolutely can not miss this! My car is a 1992 grand prix LE 3.1 with a 3 speed tranny! any help will be much appreciated!

unfortunately the 125C is not computer controlled. The only thing that is computer controlled is the TCC. Don't sound good that is slipping and won't shift. Is the fluid level correct? Did the speedo start working after the new VSS?

yes the fluid level is fine i just flushed it out about hmm 2 weeks ago...and no the speedo did not work after i changed the VSS...im afraid...very afraid...just a lil bit ago it stopped shifting into reverse...i fear the worst...but could it be the VCC?...or a stuck valve body maybe?...im stuck but thanks for the reply!

You stated that you had the transmission flushed. I wonder if that just shocked the system into failure. Sounds like a rebuild or major repair is needed, but I am not a tranny tech or capable for diagnosing those issues.

With it being a 92' I can only assume that you had really high miles when it was flushed.

Good luck.

ok guys! this morning i replaced a heater hose that was cracking and i started the car and it started to idle roughly and displayed SES so i got out my trusty paperclip and pulled the codes...code 33 map sensor high voltage, low vacuum..the transmission is vacuum operated correct? im about to go pull it up on the ramps n start lookin for a broken vacuum line...

Yea if the vacuum was bad you would get late shifts but.... it wouldn't slip and still would shift.

yaa i think the tranny is shot...it wont go into reverse now...thanks for all the help guys!