Trandsmission Overdrive Light Flashing

[GT3000]

Hi, whenever I shift into 2nd(?) gear my overdrive light begins to flash. I took it to transmission shop where they serviced the transmission (dropped the pan and changed the fluid/gasket) where they said everything was in fine shape. I had the codes pulled and got DTC 452. The speedo is dead as well. What should be my first course of action?

 

[PopRichie77]

Dropping the pan and looking, in no way can they tell if everything is fine.

 

[Vic_Ferrari2002]

http://www.thedieselstop.com/faq/9497faq/maint/vra/vra06040.htm

http://fullsizebronco.com/forum/showthread.php?t=161210&highlight=psom

Should give you all the info you need to find and fix the problem.

 

[robert hamlin]

replace the transmission output shaft speed sensor is probably causeing your spedo not to work and can cause the vehicle to go into limp in mode ,