Re: Timing Chain
Is there a specific problem that the truck is exhibiting that makes you suspect the timing chain? I can't remember if the 3.0 is an interference engine, but if it is, you will definitely want to replace the chain and gear set before it goes out.
As for other things to watch out for on the 3.0, the cam sync/ cam position sensor is a big one. They both need the be closely monitored as they are prone to premature failure, although you've gotten pretty far along without a problem i'm assuming. Either way, it needs to be checked, because if the cam sync fails, boom goes the motor.