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Old 12-04-2011, 04:06 PM
oab_au oab_au is offline
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Re: Wynndi got me thinking about transmissions

Quote:
Originally Posted by Huskymaniac View Post
That makes sense. Does opening up those holes also improve flow and line pressure or does it only really increase the speed of the shifts? I was under the impression is does both. It sounds like the tradeoff was between harshness and speed (and maybe reliability).
Yes it is a comprise to get a smooth operation, though when they are modded with a Transgo kit, they are not too bad, as long as the shift accumulator springs are not increased. They don’t do any thing for the line pressure.

The line pressure is a continuous flow of oil through the valve body, and mainshaft. It leaks oil through all the clutches and valve body drains. Instead of turning pressure on to a servo to move it, the drain is turned off, to allow the pressure to build up to move it. There is really no problem with the line pressure flow. As I have said before, that is solely a TCU control problem, made worse by the high final drive ratio.

Harvey.
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