question rear end howl/whin

[twoolley08]

well time to go jack this lil 10 bolt up an spin some ds and do some countin ill let yall kno what the verdic is

[Iroc'nthe87]

did it stop after they where replaced??

Yes. Pop off ur diff cover and check it out.

[twoolley08]

alright guys i jacked her up spun the ds th wheel went around once, the ds about 1 7/8 turn

[my95z28]

Lol, go try again. That would mean that you have like a 1.875 rear end. I'm going to guess that you missed a revolution and over estimated a bit, and that in fact they are 2.73.

[twoolley08]

Lol, go try again. That would mean that you have like a 1.875 rear end. I'm going to guess that you missed a revolution and over estimated a bit, and that in fact they are 2.73.

haha maybe so but the rpo on the door states its a 3.23

[my95z28]

haha maybe so but the rpo on the door states its a 3.23

Lol, I don't know then, that was just my guess because a 2.73 gear is close to 2 3/4 turns of the driveshaft. Or the 7/8 that you said.

[1BADAIR]

alright well i found that info, it states its a 3.23 gear. except i found a site that supposably tells you your gear by speed rpm and tire and it says 3.73 sooo im inclinded to think that it has been changed

the factory tach is usually off by about 200-300rpm

[tenpin842]

90% of aftermarket gears are going to make noise.
My 3.73 gears make a little noise.
My Nephew just paid for a brand new rear end for his 72 Formula.
That has a 4.11 gear in it, that also makes noise.

I have a Richmond, and hes got an Eaton.

But if it didn't make noise, and now its making noise. 1st thing you do is check the gear lube in the rear end.
Its supposed to be changed every 25,000 miles.

[twoolley08]

ok didit a couple more times came up with 2 7/8 and 2 3/4

[my95z28]

then you have 2.73 gears.

[twoolley08]

i counted the ring gear there are 42 teeth

[1BADAIR]

i counted the ring gear there are 42 teeth

sounds like a 3.23.
it should have 42 and another number stamped on the gear

[OIF1VET]

I have aftermarket 3:73's and they've howled since I owned the car. Accel, Decel, steady speed.. Had em checked out, changed lube, everything was fine. Just noisy gears..