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Is this a TH400 or 4L80??
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10-29-2022, 07:43 AM
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b454rat
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Join Date: May 2004
Location: Binghamton, NY
Posts: 3,454
Re: Is this a TH400 or 4L80??
TH400. 4L80 is easy to ID, has a waffle pattern on the bell housing.
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2000 GMC CCSB 454/4L80 6” lift SAS
1999 Chevy CCSB 454/NV4500 6” lift
1999 GMC Yukon 350/4L60 4" SAS
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