89L98T56

iTrader: (8)

Alright so I bought a used Moser 9" off a member here about 2 months ago. He assured me it was good to go and only had 6k miles on it. He said that he had a "certified" Mechanic who specializes in gears and axles inspect it, and check the pattern and he said it was in great shape.. I took his word for it because we spoke on the phone and he has over 200 positive itrader ratings. Anyways I finally got my car going and right away, first drive, this thing is so freaking loud! It's an ear piercing whine. Top of third and up sounds like a freight train is barreling down on me! It gets louder the faster you go and as soon as you let off the gas it goes away. I was told it has 31 spline axles, 3.50 gear, and an auburn limited slip. So I guess my question is, Is this normal? I know some gear sets are louder than others but idk what this has in it. Some insight would be appreciated. Thanks,

-Sean

Carl at CRP

iTrader: (9)

What brand and weight rear end lube did You use?

89L98T56

iTrader: (8)

Lucas 85 140. Would that affect the noise?

Zmg00camaross

iTrader: (11)

Do you have aftermarket suspension parts with rod ends?

Carl at CRP

iTrader: (9)

You used a good brand! The question was more of a way to determine You indeed put in the necessary oil without sounding like an accusation.

You might pull the drain plug and get a sample of the oil from the face of the plug to see if there are metal grindings on it.

How much backlash is there at the pinion?

Carl

89L98T56

iTrader: (8)

No they are all Poly bushed.

Ah I see. That is a good idea. So are there any set-ups that are normally noisy? Or is noise a sign of premature wear?

killagt

iTrader: (3)

U say Lucas gear oil is good oil ? im asking cause i am using it now, and im thinking switch to different brand.

Carl at CRP

iTrader: (9)

Noise can be caused by so many different things, poor set-up, poor quality ring and pinion, bearings and the number one killer in this industry...abuse. But that is why we buy these parts so we can abuse them!

Take Your time, do some trouble shooting trying to pin the noise down and hopefully it will be something simple.

Carl

89L98T56

iTrader: (8)

This is a serious noise. Almost un-bearable to drive. I can't hear my radio or exhaust over it.

Carter Hays

It is not normal and you need to inspect it, or have someone do it.

Bob@BruteSpeed

iTrader: (16)

I agree, and in the end it may take a new set of gears. You can have two identical appearing set of gears and one can be loud and the other one quiet. Bob

93v8clone

what kind of trq arm ya runnin ? i know chassis mnts will channel a lot of noise thru . butttt if ya say ya cant hear your sterio over it ya deff have a problem beyond that . if its on accel id be lookin at ring and pinion make sure the yoke for the rear is tight and has no play . or drop the oil and see what it looks like . if ya dont know how to do rears id take it to someone who does , seein its its very easy to do but even easier to screw up in there

96lt4c4

iTrader: (5)

You need to stop driving it and pull the center section out and inspect it.

SS SLP2

iTrader: (8)

I would not drive with that much noise, I do not think pinion angle would cause that problem, but with a new install I would sure recheck it, if I were install new gears I would use a solid crush sleeve then when you get a good pattern it an't going to change
Johnny

89L98T56

iTrader: (8)

im running a stock torque arm and driveshaft and the car is lowered a lot. I have built multiple 10 bolts but never even seen inside a 9" thats why I am hesitant to tear into it.

garygnu

are any rear gears made in china?

SS SLP2

iTrader: (8)

if you are "lowered a lot" and running a stock TA I think your angle is going to be off quite a bit, now that may not be your noise problem but I think you need am adjustable TA.
as to the rebuild the 9" is a peace of cake compared to the 10 bolt

http://www.ford-trucks.com/article/i...ear_Setup.html
good luck , Johnny

Zmg00camaross

iTrader: (11)

Yeah lots of them.

89L98T56

iTrader: (8)

I was just thinking, I have the stock torque arm, and no LCA relocation brackets..... would severe pinion angle possibly be the culprit?

Carter Hays

If it is which I doubt you still need to tear that baby down. You got it used it needs a good look see. As mentioned the 9" is cake compared to 10, 12 bolts etc...