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FWIW, all I could find is that the M977 has a #3 axle with the NSN 2530-01-159-4859, not 2520-
(Shown in TM 9-2320-279-24P-1 (from DEC1998 ), Fig. 182, item 1.)
It would be great if someone had any newer TM's to share, covering the A4 HEMTT variants.
Yes, the winch assembly itself is exactly the same. Adapter parts and -numbers are described in TM 9-2320-272-24P-2, Fig. 470.
Some pics of those parts can be seen here, also.
That would be Tim Glance from Old Grouch (Chief_919); he is in Clyde, which is like 3 miles NE from Waynesville...
Give him a call; his number is posted here...
It really shouldn't be able to move-in much past that 1st notch. Could it be that the retaining snap-ring #53 is missing? It goes in the groove, in the splined end of shaft #4 and stops the shift collar #38 before it bottoms out at the end of the splines, on shaft #4.
Well, yes - if you mean...
Not difficult at all!
Maybe read this old thread showing seal numbers. Also post #8 in that same thread. (much easier to change seals and dust boots with the shaft removed, of course.)
The correct seal for the rear (aux.) output shaft would be Timken #254287 (1.25" hsg.bore; 7/8" shaft diam...
See below diagram....
Unscrewing 5 cap screws (#37) is all it takes to remove the whole rear auxiliary drive unit and take a look inside.
It should come off easily; if not then the front nose of the output shaft (#40) could be stuck in the corresponding shaft assembly #4 and that would already...
Here is how...
https://www.steelsoldiers.com/showthread.php?59917-How-to-post-pictures-a-tutorial&p=1295196&viewfull=1#post1295196
or
https://www.steelsoldiers.com/showthread.php?59917-How-to-post-pictures-a-tutorial&p=2026066&viewfull=1#post2026066