DHD ZTSRK371 Transfer Case Synchronizer Blocking Ring Kit 261XHD 263XHD

Improve mode selection and correct synchronizer function with this blocking ring kit from DHD. The blocking rings act as the clutch in the synchronizer. Replacing this component will require transfer case removal and disassembly. Related seal kit for assembly: DHD 100-263.

Fitment:

GM NP261XHD or NP263XHD transfer case found in 2001 to 2007 GM Duramax vehicles.

Note: If your truck is struggling to complete a mode shift, 4wd to 2wd or vise-versa, there's a good chance this could be contributing to the issue. Worn blocking rings will increase the length of time required to make a shift and/or cause grinding during the shift. 

Subcomponent of:

50449, 12477939, 88962337