In the 70's Jeep had Quadra-Trac transfer case, which was chain drive,
full-time 4WD, with a high and low range planetart reduction unit, and a
"emergency" drive capability (which locked the limited slip differential in
the transfer case)

Later on came the Selec-Trac system which is a full-time/part-time transfer
case with shift on the fly. (The was also a Command-Trac part time transfer
case)

This was optional on XJ Cherokees

Then came Quadratrac II on the Grand Cherokee, which is the same operation
as Selec-Trac, but a few different transfer case models were used over the
years.

Quadra Drive is the latest system which uses the same transfer case as
QuadraTrac II and adds limited slip/locking gerorotor differentials front
and rear, and is quite a capable system.

-Andy W



"Kurt R. Todoroff" <sharkone@aol.comDELETEME> wrote in message
news:20030724102920.01045.00000378@mb-m22.aol.com...
> My mother just traded her 1999 Grand Cherokee Laredo for a 2003 (4?)Grand
> Cherokee Freedom. The center console has a plate under the transfer case
lever
> that says "Quadra-Trac II". I thought that Quadra-Drive replaced
Quadra-Trac.
>
> I visited the Jeep web site and did a search on Quadra-Trac and
Quadra-Drive.
> The search returned information on Quadra-Trac but nothing on
Quadra-Drive.
> When I clicked on 4WD systems, the site provided information on
Quadra-Drive
> but nothing on Quadra-Trac.
>
> Can someone help me to understand this?
>
>
>
>
>
> Kurt Todoroff
> sharkone@aol.com
>
> Markets, not mandates or mob rule.
> Consent, not compulsion.
>
> Remove "DELETEME" from my address to reply