Front End Noise & PM Suggestions

[wesmabry]

New here. First post.

 

I went from stock 20" (270/55) rims to stock 18" (265/65) and am hearing a metal on metal grind coming from the front end at deceleration only at speeds of 12-18 mph and occasionally when braking. I was under the impression that I could go down to 18" with no problem, but 17s would require some type of adjustment. What would cause this noise if it was the rim downgrade? How do I trouble shoot this? I'm Going to look at pads and rotors real close this weekend. Torque converter by coincidence, maybe hub assembly?

 

Also, at 85K I'm knocking out some preventative maintenance repairs. Already did the thermostat & coolant temp sensor, will do plugs this weekend, and am running synthetics in the engine. Is it worth the expense to run synthetics in the tranny too? Recommendations on what to tackle next?

 

many thanks - wes

 

2007 Silverado / New Body Style / 6.0L / 4WD / 84K mi.

[00Silverado4x4]

Welcome to the forum.

 

I'd definitely get the front end jacked up and check everything out. Hopefully nothing too serious. As far as synthetics, your trans should already have Dexron 6 which is all I personally would put in it. Now as far as other items to check, transfer case fluid change, engine/AC belts, front and rear differentials. Since your already doing the thermostat you could flush the entire coolant system and check out your air conditioning for refrigerant levels/pressures.