bmxer8699

iTrader: (16)

I did a few searches but im getting mixed posts from people.

I have had a dana s60 since i bought my 01 Z28 a year ago, it has 3.73 gears in it, not sure what brand. But when driving it has always been loud as heck, people that get in the car think its broke Just wondering if it was normal, took it to the track a few times and its just fine. Some people say its quiet, some people say its a loud rear end.

Is there anything i can do to quiet it down or is this just how it is?

wrd1972

iTrader: (12)

Another classic case of a bad gear setup. Going to ahve to but new gears and have them set up right the first time and it should run rather quiet. Nothing you can do with the current gears. They are garbage.

kenSS

iTrader: (1)

sorry man. Mine is quiet.

Blackbirdws6

iTrader: (7)

Quiet here with 3.73`s...best to have it looked at.

bmxer8699

iTrader: (16)

what would you all recommend for gears brand wise? And how do you think they were setup wrong?

wrd1972

iTrader: (12)

Motive Performance gears are what I like.

How could it be set up wrong:
Pinion depth could be too shallow
Pinion depth could be too deep
Pinion preload too loose
Pinion preload too tight
Pinion bearings not replaced or installed incorrectly
Crush sleeve if used overly crushed
Too much gear backlash
Too little gear backlash
Too much carrier bearing preload
Too little carrier preload
Carrier bearings not replaced or incorrectly installed
Ugly gear pattern indicating bad gear mesh
Incorrect gear break-in
Not enough gear oil
Improperly machined or lapped gears

As you can see, there are many possibilities that could result in a bad gear setup. It takes some skill and a little luck to nail it.

EPP

iTrader: (22)

You can also have two gearsets that appear to be identical, both set up the same, and one can be louder than the other. Bob

wrd1972

iTrader: (12)

Yup, gears are just weird like that. How the auto manufacturers do it and keep them rather quiet, in mass production is beyond me.

The gears in the rear-end have many, many times more adjust-ability and range than any other component or assembly on the car including the motor. You have to find the perfect (needle in a haystack) spot in order to ensure they run quiet.

bmxer8699

iTrader: (16)

thanks man for the info, sorry i didnt respond earlier, i havent had time to get on recently. So basically my gears could be fine, just loud "just because". I kinda get it now. If thats not the case how will i know if something is wrong?

As you listed there are MANY factors in setting it up right.

MY99TAWS6

iTrader: (3)

Once they have bad pattern pretty sure too late to correct pattern and get them quiet.
The newer dana are supposed to have oem gears,supposedly strange switched over at least think in the lower ratios like my 3.54. My rear end has some decel whine but not much accel whine. However have been fighting some vibration issues but not sure exactly what is the cause yet. And do have a crossmember mounted torque arm which also might transmit some additional noise.
I have heard good things about yukon gears and really if you get a OEM gear for the Dana and its setup right no real reason it should't be pretty darn quiet.