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Re: THM 4L30-E 2nd clutch drum
Posted to Transmission Forum on 1/20/2011 1 Reply

The fore-runner of this transmission is the TH180. It was around from 1970 till about 1988. The three speed section of the 4L30 shares many components with the older unit. One component that is not interchangeable is the 2nd clutch drum.

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