Originally Posted by daveb
Well when I rev up the engine while in drive (or any gear) the speedometer does not move. Transfer case is shifting correctly. Advanced Adaptors told me if the case shifts OK then it's probably good and suspected the transmission.
Another clue I just noticed is the overdrive light is in the off position and is blinking. It will not go into overdrive even though when it failed it was in overdrive. So anybody know what the blinking represents???
Trany fluid looks OK.
Hey, which transmission does your rig have?
I'm not familiar with how OD is handled on anything other than the E4OD, in which overdrive is achieved by a simple electrically-actuated lockup of the torque converter --- does yours get handled the same way?
If indeed your transmission achieves its OD by electric-lockup of the torque converter......then......based on the fact your OD light is blinking....I'm going to throw my hat in the ring and guess torque converter failure. (As was something I think Boywonder also threw out there as a possibility early in this message-board diagnosis session.)