Odd Tranny Concern

[cancruiser]

Hey all, I have just recently found this forum and am hoping that you might give me some insite on a odd issue with my 96 XLT Sport.

Everyday when I get going in the van, I'll drive about 10 minutes then the overdrive light on the shifter starts flashing. If I slow down and put the tranny in Neutral, then turn off the van and restart it the light goes out and will not come on again during the drive.

Also, the tranny clunks when downshifting from 2nd to 1st. I've had it in to a very well trusted tranny shop and they couldn't reproduce the problem (figures) but did fix another issue I had with the tranny cooler.

The fluid level in the dip looks good and I've had the filter and tranny fluid changed early in 2004 trying to solve the same issue.

Any ideas??

TIA

Kurt

[RexNfx400]

If the light blinks, a trouble code has been stored in the PCM. A scan tool will retrieve this code and point you in the right direction. It will shift abruptly while the light is blinking because its in "limp-home" mode. While it still drives in this mode it is very hard on expensive internal parts of the transmission. They should have been able to retrieve a "history" code.