Low-speed "clunk" 1-2 shift, A-904

I have heard the clunk you are talking about in a lot of mopars I've owned. And never really been able to clear it up, but have also never had anything fail in a car that I could blame that on. I had one one time that got on my nerves so bad that I would shift it manualy to keep this from happening. I think that mine were just high mile rears that had to much slop in the diff. as mentioned by someone else in this thread. Another way to get an idea if you have a lot of slop in the rear end is to take the drive shaft loose and just move the yoke back and forth to see how much play you have back and forth. Man My 8th grade would really jump on me about that run on sentence. LOL