Fits years 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997

The TX10A to D300 Doubler by North West Fab allows you to keep the low gears of your stock TX-10A transfercase and add a Dana 300, Atlas or Stak Transfercase behind it. This will, at very minimum, double your crawl ratio.

Available with a 23 or 31 spline output