I have an 02 blazer 4x4 the front diff won't engage I've changed the cable and checked the acuator and vacuum all good next thing to check? Any help please

 

What have you checked?


Have you made sure the transfer case is shifting into 4wd?


Are you sure the vacuum actuator is actually engaging the front diff?


If the transfer case is shifting, and the vacuum actuator is engaging, the problem is internal to the diff. the shaft collar might be stripped.