Hi! I saw a few comments on this similar if not same problem from recent years and did not see any recent messages. It's a thump/thump/thump or popping noise some who have heard it said, almost like a hesitation. I saw in previous comments replacing the rear differential oil/fluid solved the problem? My technician thought perhaps was a drivetrain issue but they could not find anything awry and suggested a deeper dive analysis for $700 to check further to take off part by part and analyze. Any other suggestions? Thanks!