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THM 425 Question

Started by Big Fins, May 20, 2024, 01:00:52 PM

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bcroe

Quote from: TJ HoplandWhat are you actually adjusting in the aftermarket modulators?  I was thinking it was basically response time, not travel.

The Vac mod does not have delay.  But turning an
after market screw in (clockwise) will cause the
shift to be raised to a higher speed, and it will
be harsher.  I find they take a lot of turns, one
of mine has 7 turns.  1/2 turn will probably not
be noticeable. 

Because I do not like harsh shifts, I tend to
adjust the vac mod to the harshness I want, then
change weights/springs on the governor to get the
shift speed I want.  My switch pitch trans in high
stall helps smoothness too.  Bruce Roe