E4OD and Line Pressure
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E4OD and Line Pressure
I'd like to learn about how the line pressure affects my transmission. I have very granular control of my line pressure so I can set it any way I want. What I don't know is how the line pressure should be set under certain conditions.
Is it best to have a higher line pressure at high RPMs? When is it best to have low line pressure?
Thanks.
Is it best to have a higher line pressure at high RPMs? When is it best to have low line pressure?
Thanks.
Lead Driver
Joined: Jul 2007
Posts: 7,868
Likes: 9
From: Rhode Island
You can raise the pressure across the board to achieve firmer shifts, but that causes excess wear on the seals, pump, etc.. since the line pressure is high all the time. You'll want to try and find some functions called Dynamic TV Pressure 1-2, Dynamic TV Pressure 2-3, etc...
These functions ramp line pressure up for a shift, then decrease the pressure once the shift is completed. That way you can get the firm shift you want, but it's not continuously putting a high load on the pump and transmission seals. The functions are simple TPS vs. TV Pressure Increase. Just play around with them until you get something you like.
Just remember that in general, the more revs and more torque you're making, the higher the line pressure you will need to successfully complete a shift.
These functions ramp line pressure up for a shift, then decrease the pressure once the shift is completed. That way you can get the firm shift you want, but it's not continuously putting a high load on the pump and transmission seals. The functions are simple TPS vs. TV Pressure Increase. Just play around with them until you get something you like.
Just remember that in general, the more revs and more torque you're making, the higher the line pressure you will need to successfully complete a shift.
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