MattZ28

iTrader: (4)

When I first installed my Moser 12-bolt, it was dead quiet. After a few launches on the street, it whined slightly on decel. Last night at the track, I launched on spray 4 times, and cut 2 low 1.6 60's. Now it whines all the time. It's not incredibly loud, just something I noticed.

I just wanted to make sure this is normal.

I don't care how much it whines....as long as the damn thing doesn't break. Then I'll have to start shooting people.

mcamarols1

iTrader: (9)

mine was quiet too p untill i took it to the strip and did a moderate run. then it whined on the accell. im having issues with mine right now too i also have a thread that you posted on matt. thanx for the suggestion. im kinda pissed though all that money and it still leaks and whines. i heard its because the gears are stronger than OEM gears im also cool with the whine i just dont want it to break!!!!!

ls2 bait

iTrader: (11)

this is the exact reason i havent dropped 3 grand on a 12 bolt yet. for the money they get for them it shouldnt be making noise.

2MuchRiceMakesMeSick

Alot of mosers will do that after a few hard launches.
Main reason why I opted for a 9"

MattZ28

iTrader: (4)

but is it normal?

CRL 01 SS

iTrader: (4)

Is it normal for a Moser 12 bolt to whine after a few launches? Yes.


Are the Moser 12 bolts supposed to whine after a few launches? No.

86irocz

I guess thats what happens when you don't watch your heat treat process.

EPP

iTrader: (22)

My Moser 12 bolt whines somewhat, but it doesn't bother me. I've had it for close to four years, and it's taken a pretty good beating. Bob

86irocz

I've been leaving off of a trans brake for the last 3 years, cutting some low 1.3's 60' times and my 9" is dead quiet. Good thing I went with a 9" cause I think I would have a pile of broken 12 bolt parts to use as paper weights.

MattZ28

iTrader: (4)

Huh? I heat cycled it 5-6 times before getting on it at all.

86irocz

I'm talking about the manufactures heat treat process. The castings need to be a certain hardness so they can still cut then without tool life issues and still be hard enough to handle torque loads. I would say they are too soft cause I see a lot of posts about having gear noise after a few hard launches. This meaning that the casting may be distorting under load and it is unable to keep the pinion to differential bores in tolleremnces.

Ryan02SS

iTrader: (3)

If I spent $2K on a axle that whines I would be really pissed! The 8.8's, 9"s, Dana 60's we've built for offroad rigs do not whine. Many get beat on alot harder than the average 12 bolt ever does. IMO it's simply a shoddy product.

MattZ28

iTrader: (4)

I can understand that those rears undergo a lot of stress and all, but I would think the shock of a car launching on slicks would be greater.

glennster

iTrader: (1)

Its normal.I bought mine used and it was DEAD QUIET untill I did some hard launches with DR's.It screamed like a banshee on decel until you stopped.I couldn't live with the noise so I installed a richmond gearset and solid pinion sleeve.Its been great with slight whine at a 55 mph target area but you need the windows up w/no radio.Then again,I haven't had it to the track since the gear.Also the "screaming" ring and pinion looked perfect.

MattZ28

iTrader: (4)

Good to hear, thanks glennster!