EXHIBIT 99.1

                                POWER OF ATTORNEY
                                       AND
                              CONFIRMING STATEMENT

         KNOW ALL PERSONS BY THESE PRESENTS, that I hereby designate, appoint,
and constitute, and hereby confirm the designation, appointment and constitution
of, each of Karl A. Stewart, Timothy R. Donovan, Anne E. Frueh, Horace V. Draa,
Debra E. Kuper, J. Jeffrey Zimmerman and Robert P. Zapinski as my true and
lawful attorney-in-fact and agent, with full power of substitution, for me and
in my name, place and stead, in any and all capacities, to execute and file on
my behalf all Forms 3, 4 and 5 (including any amendments thereto) that I may be
required to file with the U.S. Securities and Exchange Commission and any stock
exchange as a result of my direct or indirect ownership of, or transactions in,
securities of Tenneco Automotive Inc. or its subsidiary companies. I hereby
further grant unto each said attorney-in-fact and agent all full power and
authority to do and perform each and every act and thing requisite and necessary
to be done in and about the premises, fully to all intents and purposes as I
might or could do in person, hereby ratifying and confirming all that each said
attorney-in-fact and agent or my substitute or substitutes may lawfully do or
cause to be done by virtue of the power and authority granted hereunder to each
attorney-in-fact. The authority of Karl A. Stewart, Timothy R. Donovan, Anne E.
Frueh, Horace V. Draa, Debra E. Kuper, J. Jeffrey Zimmerman and Robert P.
Zapinski under this Power of Attorney and Confirming Statement shall continue
until I am no longer required to file Forms 3, 4 and 5 with regard to my direct
or indirect ownership of or transactions in securities of Tenneco Automotive
Inc. or its subsidiary companies.

         I hereby acknowledge that Karl A. Stewart, Timothy R. Donovan, Anne E.
Frueh, Horace V. Draa, Debra E. Kuper, J. Jeffrey Zimmerman and Robert P.
Zapinski are not assuming any of the undersigned's responsibilities to comply
with Section 16 of the Securities and Exchange Act of 1934, as amended.


Date:   October 18, 2004
        ----------------------------------------

Signed: /s/ Jane L. Warner
        ----------------------------------------