95'Jeep Wrangler SIerra- Recently replaced the frnt brake rotors/pads and rear brake drums resurfaced drums new pads and hardware. This jeep has spent most of it's life in SaltLakeCityUtah where undercarage corrosion is and can seriosly shorten the life span of components. Since we did the brakes we've been noticing that when braking theres a slight thump sensation. Our tech thinks it could be aging tires or posssible the U-Joints. We thought it could be one of the Drums slightly warped since it only started happening after we did the brakes. Any suggestions would be great.  

You won't feel anything from an out-of-round drum. But the shoes might be moving on the backing plate if they are not installed correctly. Sometimes things slip when installing shoes and it gets overlooked. A dap of high temp grease on the backing plate nubs so that the shoes can slide nicely.

If the rotors were turned because they were warped, they could have hot spots that would not be removed from turning. You will feel a chatter in the padal and/or the steering wheel. Also, the caliper slide pins should be checked, cleaned and greased. Make sure the caliper bolts are tight and the caliper slides easily.

You also have to be careful when compressing the piston that it does not get cocked in the bore, causing it to hang up.  

Thanks, I'll spend some time trying to better diagnoze the problem- stearing vibration, pulling to one side or the other. But, some really good advice thanks.