PTXer

You can get those RPO codes from the label on the inside of the glove box.

What is your RPO code? That should narrow it down. It might be stamped/labeled on the case as well.

Does it make noise (clicking/clunking) at low speed going around a sharp turn? That's usually how they sound when first starting to fail. Just a matter of time though with a cut boot. I dont think they are too expensive and not terribly hard to replace.

My 03 has a vibration at 65 and I too have already replaced hubs. Another thing I have not checked that supposedly can generate vibrations is U joints. Not sure the easiest way to check those, but they're relatively cheap so might just replace them for the heck of it. Glad to see you back on the forum Chris. You've been absent for awhile.

I have a set of replacement fuel lines ready to go too, but am not looking forward to that bellhousing nut. I supposedly have to remove the ABS module and torque tubes crossmember to get the back half of the set in. I have also read to remove the front driveshaft and use two 12" extensions and a swivel socket to get that thing off from the back. Also read that someone sat up on top of his engine and reached down around and got it off that way. Let us know how it goes....