With all due respect, mechanical knowledge is not genetically passed. Mechanical ability perhaps...
There are 2 different rotors that are called for on this truck. With or without front wheel abs. Was the identical one used?
What quality ones were used. Cheap ones are not made as well.
There are bearings inside the rotors that need to be meticulously cleaned and repacked with clean grease. They need to be looked at when the are clean to see if they are still good. Any sort of contaminants can cause problems. The axle nut can not be overtightened.
If there was a roughness issue on the replacement rotors, they should not have been used. IF the roughness was on the race that the bearing ride on, then I would plan on new bearings now.
I would suggest Raising the front end and spinning the wheels be hand to see which wheel is making the noise. They need to be pulled back apart and inspected. It is possible the dust sheild may have been bent and is touching the rotor...easy to do. When I am doing this kind of job, I always roll the wheel around before I put it back on the ground to eliminate having to bring it back in.
Hopefully your friend is okay with this. A shop would have to do this at no charge, but of course it would have cost more to have had this job done to begin with.
Thursday, January 7th, 2010 AT 5:59 AM