2002 Ford Ranger Edge 3.0L 67k miles I bought the truck today and I posted about it in the forum under an oil reccomendation for it. Some folks recommended that I listen for a chirping noise while in operation to signal that the synchronizer would need changing. While test driving prior to the purchase, I did not hear anything remotely related to a belt squealing or a "bird chirping" type of noise while on a 10ish mile stop and go test drive. I did however hear a chirping noise as I was riding around the walmart parking lot looking for a spot to pull in to. It was only really hearable while moving and not so much while stopped at idle. YouTube mechanics say the synchronizer usually fails or starts failing around the 60-75k mile area. I'm not really bummed out about it mainly since it is only a $65 part with the sensor at my local oreillys. How long can I go before it needs changing?