92 maxima speedo works sometimes

not sure what the problem is i have tore out the dash cleaned all the connections, still no change have been told the speed sensors go bad a lot on these cars. could that be it and where on the tranny is it located? any help apprecated. i priced a new one their about 70.00 i guess you have to pay the piper for imports ,my aerostars is only 13.00 well thanks ahead of time.

Take speed sensor out (at tranny), rotate, measure 0.5VAC ... see FSM page EL-48. Then check you get this signal at speedo connector (drive). Maybe speedo itself is broken ... see all via http://www.cardomain.com/ride/748507/1

thanks for the help. sensor was bad 15.00 for one out of the junkyard