Tech

iTrader: (1)

A friend of mine is looking to replace his factory 3.23 10-bolt due to axle bearing failure.

His primary criteria for finding a rear end are:

• Quiet
• 4-channel ABS
• Highway friendly gears (sub 3.73)

He's not a drag racer or a hot rodder. He just likes tinkering with toys and doesn't mind paying for expensive parts if they fit his needs best. It seems his options are to rebuild the 10 bolt, S60, 12 bolt or 9".

I personally only have experience with 10-bolts and Moser 12-bolts. Regardless as to what people claim, every 12-bolt I've heard is noisy. It seems hit or miss with 10-bolts.

He's not looking to set land speed records or withstand launches off a transbrake. What do you guys think the best option is for him?

djfury05

iTrader: (30)

http://midwestchassis.com/f-body-bol...ed-9-rear.html

garygnu

check out the 8.8 threads.maybe check out Bob at brute force,he sells moser rears.

LS1-IROC

iTrader: (4)

Ford 9" with a Ford factory set of gears and a Trac-lock posi will be quiet as a mouse as long as it's set-up correctly.

Tech

iTrader: (1)

Are you saying that your rear end is as quiet as a factory 10 bolt? No whining? No clunking?

Seems like noise from 9" may be common...
https://ls1tech.com/forums/gears-axl...out-whine.html

djfury05

iTrader: (30)

Mine was just as quiet as stock until I did 5500 rpm launches on slicks at the track with it which prolly threw the gears off a little or something. Still very quiet though.

arock24

iTrader: (4)

If he doesn't mind spending money, a fabricated 9" from Mwc will be the lightest set up but IMO the best 'bang for the buck' is the s60 through crp. It's heavier but it's damn near invincible and doesn't have a lot of complaints with noise.

Tech

iTrader: (1)

Most of the friends that have had them say the same thing. My friend doesn't care about weight, or really even strength (10-bolt was fine). It needs to be quiet. Even a small whine is too much.

djfury05

iTrader: (30)

Sounds like maybe he's better off trading his car in for one of these then if he's scared of a few little noises...

Tech

iTrader: (1)

The first criteria listed in my original post was that it was quiet. You suggested a rear end that howls. Thanks for all of your help.

Anybody else have feedback on which design(s) are suitable for my friend?

djfury05

iTrader: (30)

Do you have a lack of reading comprehension by chance? You clearly stated in your "first criteria" that he wouldn't be doing any drag racing. Why would he have any other reason to launch at high rpms? I said mine was perfectly quiet until I launched at high rpms and stressed them.

Tech

iTrader: (1)

Anybody else?

therabidweasel

iTrader: (5)

If the 10 bolt is suitable, why not rebuild or shell out a few hundred for a salvaged unit...I am assuming a spool would be unacceptable, so you might be talking about a $3k rear for a guy that doesn't need one
o
My mwc has a very slight amount of noise with 3.70, you have to listen for it with the windows open...don't see how any rear could get much quieter with bigger than stock gears. .but it is still new.

From my reading on here I'm fairly convinced it's all acrap shoot. If you want quiet above all else buy motive or Yukon gears and have them set by an old timer that gets paid by the hour . and make sure you use a stock torque arm and rubber trans mount.

Bob@BruteSpeed

iTrader: (16)

Aftermarket gearsets are designed for strength and tend to produce some gear whine. No one can guarantee that there won't be a little gear whine. The 9 inch rears tend to be quieter than the 12 bolts. Bob