Torque limiting
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Torque limiting
Has anyone tried using Forscan to “fool” the pcu in to thinking it was in Dually to reduce the torque limiting in lower gears?
Seems like it would work if you could find all the parameters that require changing; or am I missing something?
Seems like it would work if you could find all the parameters that require changing; or am I missing something?
Hotshot
Joined: Oct 2015
Posts: 19,676
Likes: 12,797
From: Wyoming
I can light up the passenger rear tire even with my 11K toy hauler connected. That may be may be more of a statement about the lack of "stickiness" of the OEM tires than it is about the torque management.
Is the torque management still active when a trailer is connected?
Is the torque management still active when a trailer is connected?
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Cargo Master
Joined: Dec 2003
Posts: 2,182
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From: Saint Augustine, FL
I was towing home sunday afternoon in very heavy rain. About 20 minutes from home I have to negotiate a pass through the Blue Ridge that has a stoplight at the bottom of a moderate climb. It was raining pretty hard and I was trying to climb the grade after leaving the stoplight. I was listening to music when it seemed the truck was struggling to climb the grade and instantly noticed the TC light started flashing on the dash. I turned off the music and focused on making the climb. It was actually difficult to get the truck to accelerate up the grade without spinning the rear tires, even being very careful with throttle application. Switching over the 4wd solved the problem instantly. Although I could easily spin all 4 tires if I tried more than adequate throttle.
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I was towing home sunday afternoon in very heavy rain. About 20 minutes from home I have to negotiate a pass through the Blue Ridge that has a stoplight at the bottom of a moderate climb. It was raining pretty hard and I was trying to climb the grade after leaving the stoplight. I was listening to music when it seemed the truck was struggling to climb the grade and instantly noticed the TC light started flashing on the dash. I turned off the music and focused on making the climb. It was actually difficult to get the truck to accelerate up the grade without spinning the rear tires, even being very careful with throttle application. Switching over the 4wd solved the problem instantly. Although I could easily spin all 4 tires if I tried more than adequate throttle.
Cargo Master
Joined: Dec 2003
Posts: 2,182
Likes: 7
From: Saint Augustine, FL
As the incline increases, the tongue weight decreases (less "normal" force as described in the world of physics). Yet the "load" (pull force requirement) increases with the incline. It's a double whammy; you loose traction but gain sensible load. Add in some Friction Modifier (rain) and it does make for issues such as you describe.
I do understand the load transfer issue. I am a vehicle dynamics engineer.
Laughing Gas
Joined: Oct 2017
Posts: 787
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From: Lansing MI
Cargo Master
Joined: Dec 2003
Posts: 2,182
Likes: 7
From: Saint Augustine, FL
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