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Originally Posted by bbeardb
You know, I just thought of something. At some point in time, don't remember when, I disonnected all the EGR stuff. I know it shouldn't, but I wonder if that had an affect at all.
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Don't even start second guessing yourself regarding disconnecting the EGR.
I have
all lines disconnected and removed from the black box and the SD shifts perfectly. Note, however, that I reduced transmission vacuum at idle from 12" down to 8". I'm right at the edge of clunking on downshifts........in fact.........I'll get a downshift clunk when the transmission is cold. But, all the upshifts are firm but not harsh.