Hey there - forgive me if this is a stupid question...I'm just a girl not a gearhead....a Toyota dealership replaced both rear axles, seals, bearings, and related parts in 2011. My new mechanic says the bearings in the pumpkin and/or pinion bearings are bad. I'm getting clunking shifting in P-R-D and a grinding or low rumble noise at 45mph/70mph - it's getting worse. Is there any relationship to the pumpkin and the rear axle or is this just normal wear and tear on my 99 4Runner. She has 239k. Thanks!