How to Re-Gear, Replace, or Restore the Heart of Your 4x4

Case Files: Rockland Standard Gear has engineered a heavy-duty replacement for the NP246, NP261, NP263, and NP149 transfer case rear halves. In addition to being thicker than the OEM units, the Tranzilla HD case is said to eliminate a few costly fixes that tend to afflict longtime users of these T-cases.

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