Hello. I have a 77 jeep cj5 304 with a T150 transmission.
Question: I'm getting a rattling noise while coasting in
gear with the clutch pushed in. this is the only time I get
the noise. I was under the jeep today (only had it a month),
it looks like a new T150, not even dirty. i drained it and
got quite a bit of very small shavings in what looked to be
pretty new 90weight. The yoke where the transfer case hooks
up to the rear drive shaft has some play, and there is evidence
of fluid leaking around the shift linkage for the transfer case.
Wondering if the shavings migrated to the transmission from the
transfer case? I was thinking the transmission was bad, but now
i wonder if it isn't the transfer case (dana 20)?
any opinions?
thanx

If you're getting significant play in the shaft of the t-case rear output, I think you've answered your own question.

Also, don't neglect the possibility that you may have two different problems. One may be causing the noise, the other may be causing the shavings.