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    1. #1
      Join Date
      Nov 2021
      Location
      Va
      Posts
      9
      Country Flag: United States

      4l65e shift pressures and steady state pressures

      Hello folks,We have restored a 67 malibu with a GM crate 350 HO and 4l65e transmission. The transmission came with tuning for drag racing but in fact this is a street car. For whatever reason GM can’t seem to get me tuning for street application so I am looking for help. I have already modified the shift points so that the car is drivable but I don’t know where to set the steady state pressures. I have changed the shift point curves in the graph in the GM TCU software to my liking but I have no idea where to set the steady state pressure curves. The documentation is no help. I can’t even find information on the web about the steady state pressures. The reason I’m pursuing this is because the transmission runs a little hot at over 210 degrees on a 55 degree fall day. The shifts are still firm and fast so I’m wondering if the steady state pressures are wrong for my shift points. Can someone explain the difference between these two pressures and help me adjust the steady state pressures to appropriate values? The drag tuning had the shift and the steady state pressure curves almost identical.






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