8-3/4 Noise After Rebuild..What's Normal??

a gear set 195-227, bearings and shims 95-125 and clutch posi rebuild
kit 60-75....350-427 retail
if it was a real good gear set(higher price) there should be no noise or so very little it's not bothersome...provided it's set up correctly
...the popping noise your hearing when turning sounds like the posi not doing right. ask them if it was a clutch type or cone type (the cone type is
"somewhat" rebuildable but doesn't take a clutch kit(that they charged $$)
all the parts should have been on the invoice with the 400.00 labor for your total of 877.00 or so. they must know what parts they put in????
ask them where they got the parts for yours...or did they put in "used parts"
any noise you hear now will NOT get better with time..