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1968-1970 Nova Muncie M20, M21, M22 4 Speed Transmission Case Casting Number 3925660
Replace your damaged or broken M-20, M-21 or M-22 transmission case with this new GM licensed OE style factory case. This case has 3925660 with U.S. PATENT and GENERAL MOTORS CORP. cast on it. Both fill and drain plugs are drilled and tapped.