No overdrive

[85 toy]

I have a 1995 Chevrolet K2500 5.7 with a 4L80E transmission. It has been slow going into od but now it doesn't shift at all. Everything else works, just no overdrive. Does it operate on a vaccum modulator or is it all electronic?

 

[transman731]

it's all electronic.
it could be a lot of different problems, my first advice is to get it somewhere they can check it for codes. being a 95 it doesn't have to set the cel if throwing a trans code.

 

[85 toy]

Can you repeat that in english? You lost me at the cel.

 

[snappy]

Check engine light ..... Cel

 

[85 toy]

OK, thanks

 

[transman731]

sorry, i should have clarified that.

 

[85 toy]

Thats fine, I probably should have known that.