BrightRhino

Hello, Car has 140K miles on it, and runs well overall. I replaced the front passenger and driver axles a few months ago with remanufactured axles, which growled for a while and settled in over the months and are pretty quiet now. In the box was a slip of paper that mentioned I may need a new transmission mount since the new axles were stiffer than the old ones and could push back on the transmission, or something to that effect, which I just remembered as I type this. In the last two or three weeks I started hearing a faint ticking noise, which only happens when I am accelerating, or going uphill. It's speed is matched to the tire speed, not the engine speed. If I take my foot off the gas, the sound stops immediately. The sound has gotten louder and louder, and is now easily audible. I have been searching the threads here but don't seem to be able to find the right search terms. I have seen suggestions in other threads on different vehicle types it might be a bearing in the front differential, a bearing in the transmission, the U joints in the driveshaft. I would like to fix the car, and pass it down to my son when he is old enough to drive in a couple of years. I was planning on putting the car up on jackstands this weekend and looking over the drivetrain to see if anything is visible. What could be causing this? Thanks, Alex