just had a nice long talk with
@Stephen at ord and we got a good game plan before i pull this unit for tear down .
talking with him and getting info from hm i had forgotten has gave me a good play to try .
1st = shifters in floor to let me test the system 100%
2nd = try low in 203 range box and see if noise ( marbles ) gets 2x faster .
3rd = try front wheel drive only for clunking test . if gone its in the rear end area . if there more thinking involved yet .
4th = remove rear shaft from the system to check for clunk still there in road test using front wheel drive .
5th = drain fluids and pull pto covers and check for major junk and also see if end play in gear set of 203 on lower shaft .
6th = possible refill with gear oil and re-test as atf has a lot less cushion in these units compared to atf i have in them now . yes they will work with both . but stephen said he has had less noise problems with gear oil over atf .
7th = total up results for next step plan of action.