[FWDLK] Reply - Where to get a 3.31:1 ratio 8 3/4" rear diff assembly?

[John Hertog <crossram@xxxxxxxxxxxxx>]

Hi Lou,

First, you do not mention whether your 3:31 is a Sure-Grip, or an open rear.
Actually, makes little difference; the only thing out there, for that ratio,
is junkyard.


Vibrations are a bummer. Most obvious culprit would be the front trunion
joint on the driveshaft .  Next would be the rear u-joint.

Have you tried Randy's Gear and Pinion? http://www.ring-pinion.com/  ; they
can probably rebuild your 3:31 .

I would suggest replacing the rear with a 3:23; the difference in ratio is
slight and the difference, as far as speedo, will probably be negligible.

Sincerely
John


----- Original Message -----
From: "Lou" <email4lou@xxxxxxxxxx>
To: <L-FORWARDLOOK@xxxxxxxxxxxxx>
Sent: Saturday, May 08, 2004 5:13 PM
Subject: [FWDLK] Where to get a 3.31:1 ratio 8 3/4" rear diff assembly?


> Ayone know if there is a place to get an assembled rear center section for
a 8 3/4" rear with 3.31 gears?
>
> I had another mopar tech expert test drive my car today, and he thinks the
vibration I have could be coming from either the rear diff assembly
(bearings, etc) or  the rear transmission bearing.   So now I am doing
research into parts availability and pricing in anticipation of having to
replace stuff.
>
> Given the cost of getting someone to tear into the rear assembly for
rebuild, and the scarcity of parts for the original foward look center
section, it was recommended to me that I might just want to buy a complete
assembly (later model 742 rear) and swap it in.  The thing is, it doesn't
look like you can get the 3.31 ratio that my car currently has (and I'd
rather not have to pick another ratio and then deal with the speedometer
gearing issue).
>
> Does anyone know where I could get a "new" 3.31 rear assembly (in the
event that I need one)?  If I am going to get into this thing, I just as
soon go new if possible.  I've tried some retail sites like summit, jegs,
etc, and precision gear, motive gear, and richmodn gear's web sites....no
3.31 ring and pinions even available.
>
> Regards,
> Lou
>