Tranny

[stroker_1999]

Hey guys I was racing my buddy tonight and my over drive light started to flash then the SES light came on dont know what that was all about maybe you can give me a answer on that the tranny still shifts ok.

wes

[bigcountrysg]

When your OD light is flashing that is like your CEL coming on. There is a transmission default trouble code put out by your trans.

Your CEL coming could be from high boost readings, from your map sensor. But the only way to be sure is to scan your truck for codes.

[stroker_1999]

O ok well i have a boost fooler what does that tranny code normally mean

[stroker_1999]

Fig out what the code was P1249 wastgate code cause I have the wastgate blocked off no tranny codes tranny shifts good so I think thats all it was but why would the O/D light flash tho

[2005F250]

O/D flashing could be a speed sensor. My dads truck did this and his MPH gauge didn't work until he got to 35.

[Fast_Ashley]

O/D light flashing means the trans threw a code....

[lilredpowerstroke]

You have to have a scanner that will read tranny codes. Im gonna guess the tranny sensed too much slipage and threw a code.

[Mikes7.3]

When my 0/D light flashed I wish I had stopped.
Cost me 3500 for a knew trans. The only good part about it was I got John Woods to build me one.