W124 722.317 transmission

[oel_brenner]

so the trans in my diesel 124 is slipping at high revs, its probably
ready for a re-build. I bought a used trans with "unknown" miles
but car ran and drove ( no further data on trans condition )

I got the trans cheap enough with the plan of re-building it
and swapping it out for mine and winding up with a spare trans core
that I can use down the road for the W107 car.

anyway, after looking closely at it it just seems way too "clean"
to be pulled right out of a 250K plus car, which makes me think it may have been recently been re-built
( the guy at the yard, says he did not clean this trans )

I know this is a long shot, but is there a quick way of checking the internal condition of this trans, without taking it too far apart ?

or do I swap this one into the car to check its condition
hope for the best, and plan to rebuild the original trans ?

I guess the only issue is if this new trans is worse then the unit in the car right now, I have to perform an extra trans swap.

thoughts ?

and does anyone have an opinion of the ATSG manuals as a rebuild guide ?

I have re-built auto trannys before, just not MB