My XL7 sometimes goes into neutral by itself. It's happened 4 times in the last few months and is highly intermittent. I have 54k on the truck. This is what happens.
As you are normally accelerating from a stop the trans will go into neutral. If you press on the gas the engine revs up but it's not connected to the trans, as if you had put it in neutral. After a few seconds it will grab and go into gear and everything works normally. No check engine light get set or flashes when this happens. This is a pretty weird problem and I bet difficult to find and fix.
As you are normally accelerating from a stop the trans will go into neutral. If you press on the gas the engine revs up but it's not connected to the trans, as if you had put it in neutral. After a few seconds it will grab and go into gear and everything works normally. No check engine light get set or flashes when this happens. This is a pretty weird problem and I bet difficult to find and fix.
