transmission shift points
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New User
Joined: Jun 2008
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From: provost
transmission shift points
have installed an afe cold air intake also a bullydog programmer in an 04 fi50, have been suggested to firm up shift points, assuming this means to up rpms before shift ? also am going to dual up the exhaust, want to pull 8000 pd trailer occasionally but really am looking for the most jump i can get out of the 5.4 .
Elder User
Joined: May 2004
Posts: 591
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From: Mirror, Alberta
have installed an afe cold air intake also a bullydog programmer in an 04 fi50, have been suggested to firm up shift points, assuming this means to up rpms before shift ? also am going to dual up the exhaust, want to pull 8000 pd trailer occasionally but really am looking for the most jump i can get out of the 5.4 .
I am not familiar with the Bullydog programmers, but with my Diablosport Predator there are separate settings to increase the shift pressure and modify the shift rpm points.
Increasing the shift pressure has the most noticeable effect at wide open throttle and a lesser effect at partial throttle. My understanding is that firm shifts are better for the transmission.
So to directly answer your question, firming up the shift points and raising the rpm's of the shift points are two different processes, and both processes should be available to you. Often if your programmer manual does not describe how to modify the settings you can find instructions on line.
Hey before you get too excited about pulling an 8000 pound trailer very far, pull it over to the scales at Macklin and give yourself a little reality check. Run just the back axle onto the scale and then check the registered weight against the rear axle load capacity placard on the drivers door pillar. Bet you will find that you are WAY overloaded.
Elder User
Joined: Dec 2007
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From: Michigan
As mentioned, firming up shift points is not raising the rpms. My edge has both parameters as well. Increasing the shift pressure, firms up the shifts. You are correct, a firmer shift is better from a trans durability standpoint
Elder User
Joined: May 2004
Posts: 591
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From: Mirror, Alberta
Just checked out the Bullydog site and they use the terms transmission tuning and transmission shift points. The transmission tuning will likely simply be a way to modify shift pressure for firmer shifts. In my experience do not be afraid to bump the pressure up to the maximum available, then if the shifts are too harsh back it down a bit at a time.
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