by Scott Pyle
I have a stock 99 auto 4l60e. I just had it rebuilt so the tranny is fresh but I still encounter an issue with it staying in overdrive. The cruise control acts up at the same time along with the tranny temp. But the main issue is the O/D. It's killing my mpg. It will sometimes not work at all and other times it wil obviously float into and out of o/d. How does the electronics play a part in this situation? And is the electronics the problem. Also a side note I do have after market wheels that are 335/35/18 is that a problem that can be corrected without getting rid of the wheels if it is a part or the whole problem?