Rearend noise

Many of the new gear sets are cut at what is called 3-5 I think .
It means they are not cut with as many passes as the old style gears .
I think,,,lol ,,,I could be wrong .

If I read it correctly,,,It means they don’t have as many clean up cuts,,so they are a little louder until break in .
The set of 4.10 gears we got for my sons truck ,,,it actually stated they would run hot for the first miles until they seated in .
That wasn’t the case as it turned out,,,but I was nervous about it and was not originally too happy about the purchase .
They were a little noisy for about 150 miles on break in,,,,but after that they calmed right down .
Actually worked very well,,,,used regular gear oil,,,,and of course a bottle of additive for the Sure Grip .

But,,,,it all still boils down to who setup the gears,,,,,I’ve done a few,,,,,but even race shops have new guys that get put onto jobs that they aren’t qualified for .

Tommy