My 95 olds silouhette has overdrive issues. For the first twenty minutes or so of driving it will shift into overdrive and lock out, but after that it goes out of overdrive into drive (from 1,600 rpms to 2600 rpms at 60 mph) had codes read on it. Three of the ones that came up were the throttle position sensor PO123, shift solenoid B PO755, and one was PO740 TCC error. I replaced the thottle position sensor and the first two codes I just mentioned went away but it didn't change anything. It shifts fine up until overdrive, doesn't slip at all, but it's killin' my gas mileage. Any thoughts?
have the same problem?
Saturday, February 13th, 2010 AT 4:45 PM