Line pressure increase by turning screw . . ?
03-11-2009, 06:15 PM
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Line pressure increase by turning screw . . ? When the A4 pan is removed, where is the screw located that can be turned an 1/8 or 1/4 to increase line pressure?
Picture or drawing of what to look for?
Any danger from a slight increase (1/8 turn) is it noticeable?
Picture or drawing of what to look for?
Any danger from a slight increase (1/8 turn) is it noticeable?
03-11-2009, 06:55 PM
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This thread talks about it, but any one have a picture?
https://ls1tech.com/forums/automatic...-opinions.html
https://ls1tech.com/forums/automatic...-opinions.html
03-11-2009, 07:17 PM
#3
its a torx bit in the end on the large (pcs) solenoid , Turning it clockwise will increase overall presure across the board.
Most likley if you do not have a shift kit and have not done any tuning to increase line it would be ok to do it. I would not go more than 1/8 turn and I would not do it if a shift kit has been installed or presures raised in tuning. I know at times we have turned it the otrher way down after a dyno test. If you do choose to do it and have a presure guage available. Do a line presure test with the harness unplugged from the trans to make sure the line presure max does not exceed 225 psi .
Note anytime you do any mod to a used or high milage trans there is some risk involved though it may be minimal
Most likley if you do not have a shift kit and have not done any tuning to increase line it would be ok to do it. I would not go more than 1/8 turn and I would not do it if a shift kit has been installed or presures raised in tuning. I know at times we have turned it the otrher way down after a dyno test. If you do choose to do it and have a presure guage available. Do a line presure test with the harness unplugged from the trans to make sure the line presure max does not exceed 225 psi .
Note anytime you do any mod to a used or high milage trans there is some risk involved though it may be minimal
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Last edited by performabuilt; 03-12-2009 at 10:00 AM.
03-12-2009, 09:53 AM
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I think in most cases the pressure "issues" lie in
the tune and the PCM's strategies, and not in the
base pressure. Only WOT slippage ought to need
any fiddling with the mechanical regulation. Low
pedal slip is just GM econostupidity and maybe a
wimp clutch if it's slipping in lockup.
the tune and the PCM's strategies, and not in the
base pressure. Only WOT slippage ought to need
any fiddling with the mechanical regulation. Low
pedal slip is just GM econostupidity and maybe a
wimp clutch if it's slipping in lockup.
