MIGHT be worth just dripping a bit of atf in the line going down to the alda and let it run down in there, might free it up. Have anything to lose?

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1996 s10 zr2 with a 6.5 turbo diesel
1996 c2500 suburban with a 6.5 turbo diesel
1981 300sd with a turbo 617
Monte carlo figure 8 car