To B2 or not to B2?

[Mr. BILL]

O.K.,

my 84 300SD with 240K on it slips or flairs when it shifts from 2to3. Other shifts are fine.

I was a little low on fluid and added some. that helped alot, but still slips some.

I have read and head about the B2 piston replacement. I'm not sure I'm a candidate but, I am concerned about one thing.

I have been told that an old tranny with a brown tinge to the fluid, that changing fluid was an invitation to disaster. The thinking being that the particles of clutch material in the fluid actually help the transmission clutches do their thing.

Any suggestions or advice?

Mr. BILL

85 300D
84 300SD