I had my front Wheel Bearings replace not too long ago (less than 1000 mi) and now I am going to replace the discs as they seem and give me some oscillation on braking. Just wondering what you all think of just ensuring they're well packed and sticking the existing bearing in the new Discs.

04 Ranger XLT 4x2. 123K

 

Have the rotors turned to remove any warping.

When brakes have a separate rotor that slides on over lug studs then new ones are not that costly so buying new is often just easier.
When rotor and hub are the same piece then turning the rotor for $15-$20 is better to do, not as costly

Yes, you can reused the wheel bearings.

Yes, pulsing felt at brake pedal on braking usually means one or both front rotors have been over heated and have warped, they can be turned to remove this warping one time, after that they need to be replaced usually.

But the cause of the warping needs to be addressed, if you were hauling a heavy load or a trailer and had to go down a long grade so front brakes overheated then that would be the cause.
But if that hasn't happened then you could have a bad caliper or brake hose that isn't releasing pressure fully and pads are rubbing, causing rotor to overheat, and warp.
Check pad thickness on both side, if one side has more wear then that side is "dragging".

And just as a heads up, if you do ever need to go down a long grade then use the gears to keep speed down, manual or automatic, only use the brakes once in awhile and allow them to cool down between use, so use the brakes to slow down MORE then needed, then allow speed to build back up before using them again.
If you ride the brakes you will be replacing rotors often.

 

Thanks,

I've decided to put high performance rotors and pads on with new bearings. Will be checking out the calipers as I replace the rotors.