E40D hard shifting
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Mountain Pass
Joined: Oct 2019
Posts: 163
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E40D hard shifting
I had my reputable local trans shop go through my trans and freshen up. I also had them install a transgo tugger kit, transgo line boost valve, and triple disc converter. It acts normally other than the shifts are hard going up, and even shifting down when flooring it and it kicks down. I have even made the holes smaller in the shift plate. Even smaller than the way the plate comes. I also have tuning backed off -50psi on all upshifts and downshifts. The way it is now it is acceptable, except when you force a downshift while lugging around and you get on it a bit. Having said that, it still should not need this much reduction. Not sure if the tugger kit along with boost valve is the culprit?
I have pressure tested and is as follows;
----------------------@ idle ------------------------@ STALL
_____________RANGE ____TESTED__________RANGE_____ TEST
P OR N_______ 55-70________ 90_____________ N/A________ N/A
REVERSE____ 75-130_______ 110___________ 240-265______ 320
DRIVE_______ 55-70_________ 90___________ 156-174______ 200
M2__________ 55-70_________ 90___________ 156-174______ 200
M1__________ 79-99________ 110___________ 157-186______ 240
I have pressure tested and is as follows;
----------------------@ idle ------------------------@ STALL
_____________RANGE ____TESTED__________RANGE_____ TEST
P OR N_______ 55-70________ 90_____________ N/A________ N/A
REVERSE____ 75-130_______ 110___________ 240-265______ 320
DRIVE_______ 55-70_________ 90___________ 156-174______ 200
M2__________ 55-70_________ 90___________ 156-174______ 200
M1__________ 79-99________ 110___________ 157-186______ 240
Last edited by Klutch5000; May 26, 2026 at 07:20 AM.
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