Originally Posted by Cyr220
I'm having some trouble with my Tranny too. I have to drive it for an hour or so before it will start using lock out properly. I have heard of sensors going bad but I'm wondering what sensors could cause this.
You should probably start a new thread in a different forum. This particular forum is for 3rd gen (2002-2008) trucks with 5.7L engine, which have a 545RFE transmission. Your truck (2000 with 5.9L engine) would be a 47RE transmission, I believe. So the info here may not apply to you.
When you do post a new thread, please clarify what you mean by "lock out." Do you mean the O/D OFF function (locking out 4th gear), or the Torque Converter Clutch (TCC) engagement (typically called lockup)?