UNITED STATES

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                              ---------------------

                                    FORM 8-K

                                 Current Report

                     Pursuant To Section 13 or 15(d) of the
                         Securities Exchange Act of 1934

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        Date of Report (Date of earliest event reported): March 31, 2005

                             TENNECO AUTOMOTIVE INC.
               (Exact Name of Registrant as Specified in Charter)



                                                           
            Delaware                         1-12387                       76-0515284
(State or other jurisdiction of      (Commission File Number)          (I.R.S. Employer of 
 incorporation or organization)                                  Incorporation Identification No.)





           500 NORTH FIELD DRIVE, LAKE FOREST, ILLINOIS          60045
             (Address of Principal Executive Offices)          (Zip Code)


       Registrant's telephone number, including area code: (847) 482-5000



Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions:

/ /  Written communications pursuant to Rule 425 under the Securities Act 
     (17 CFR 230.425)

/ /  Soliciting material pursuant to Rule 14a-12 under the Exchange Act 
     (17 CFR 240.14a-12)

/ /  Pre-commencement communications pursuant to Rule 14d-2(b) under the
     Exchange Act (17 CFR 240.14d-2(b))

/ /  Pre-commencement communications pursuant to Rule 13e-4(c) under the
     Exchange Act (17 CFR 240.13e-4(c))






ITEM 1.01    ENTRY INTO A MATERIAL DEFINITIVE AGREEMENT

     On March 31, 2005, Tenneco Automotive Inc. supplemented its existing senior
credit facility agreement by (i) increasing from $220 million to $285 million
the amount of lenders' commitments under the revolving credit facility portion
of the senior credit facility and (ii) reducing from $180 million to $170
million the amount of lenders' commitments under the tranche B-1 letter of
credit/revolving loan facility portion of the senior credit facility. Under the
terms of the senior credit facility, the company has the ability increase the
commitments under the revolving credit facility up to an additional $15 million,
in the aggregate (with a corresponding dollar-for-dollar decrease in the
commitments under the tranche B-1 letter of credit/revolving loan facility), to
the extent there are new or existing lenders who are willing to make the
additional commitment to the revolving credit facility. The company continues to
seek such additional commitments.

ITEM 3.03    MATERIAL MODIFICATION TO RIGHTS OF SECURITY HOLDERS

     See Item 1.01, above, which is incorporated herein by reference.





                                   SIGNATURES


     Pursuant to the requirements of the Securities Exchange Act of 1934, the
registrant has duly caused this report to be signed on its behalf by the
undersigned hereunto duly authorized.


                                            TENNECO AUTOMOTIVE INC.


Date:  April 4, 2005                        By:  /s/ Kenneth R. Trammell
                                                 ----------------------------
                                                 Kenneth R. Trammell
                                                 Senior Vice President and
                                                 Chief Financial Officer