I just finished up my mini rebuild of my 1990 300FW and I am now getting a clicking noise coming from somewhere in the front end drivetrain. When I jack the machine up and have all 4 wheels off the ground, it does not make the noise at all when I spin the wheels and they all spin freely with no binding or anything. Once I set the machine back on the ground, it makes the noise only when I push it backwards and it does not make the noise when I pull it back forwards.
I was thinking, at first, that it was the front diff but then I got to thinking that if it was the don’t diff or even the transfer case, wouldn’t the noise be present with the machine lifted entirely off the ground? If the answer to that is yes, then it leads me to believe that it’s one of the CV joints and probably the one I just replaced the inner boot on for some reason.
What are your thoughts regarding the noise on the ground only and not in the air? Any help is sincerely greatly appreciated! Cman had been helping me a ton inside my other post.
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