Holding overdrive while towing
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Tuned
Joined: Jul 2002
Posts: 462
Likes: 5
From: Kansas City, Mo
Holding overdrive while towing
I have a question. I have searched the forums and didn't find what I was looking for. What determines when the tranny down shifts? I would like the tranny to hold OD when towing just a little longer. Seems that it will down shift after it loses 3-4 miles an hour and I would like to double that. Educate me please!
Hotshot
Joined: Oct 2005
Posts: 12,237
Likes: 22
From: Florida
Cruise control or no cruise control?
I ask because in my towing experiences with my V10 Ex...you will NEVER easily hold OD with cruise on...it takes a soft feathering of the foot something cruise will not do for you...
I ask because in my towing experiences with my V10 Ex...you will NEVER easily hold OD with cruise on...it takes a soft feathering of the foot something cruise will not do for you...
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,704
Likes: 2,626
From: SE Florida
The PCM makes the decision on when to downshift. The two main inputs to this decision are accelerator position and vehicle speed. When cruise control is on it creates a simulated accelerator position that is used in place of actual pedal position.
To change this behaviour you need a custom chip or programmer.
To change this behaviour you need a custom chip or programmer.
Posting Guru
Joined: Oct 2006
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I have a question. I have searched the forums and didn't find what I was looking for. What determines when the tranny down shifts? I would like the tranny to hold OD when towing just a little longer. Seems that it will down shift after it loses 3-4 miles an hour and I would like to double that. Educate me please!
Posting Guru
Joined: Oct 2006
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I didn't miss that..............Can you be a little more specific, does ATS make a controller for the 5 speed at?????? Or does the SCT have an option for manual control to a certain point?
Freshman User
Joined: Dec 2005
Posts: 49
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i use the edge with attitude and set the motor to defuel between shifts this works well for me i tried towing it it off and same problem. and the cruise dose cause it to down shift to quickly.
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Posting Guru
Joined: Dec 2006
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From: Windsor, Colorado
I know it may seem to simple, but I just hit the button as the speed starts to drop off on the big hills. If it isnt a long grade I just let it lug a little as long as the EGT's and tranny temps dont get too high.
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Tuned
Joined: Jul 2002
Posts: 462
Likes: 5
From: Kansas City, Mo
I agree with you, I can keep it in OD without cruise but you really need to pay attention. I found that if I use the cruise and go ahead and give it a little more gas just before I get to the bottom of a hill, I can usually hold OD. It just seems to need a little bit of help.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,704
Likes: 2,626
From: SE Florida
I suspect you'll need to find someone that will make a custom program for what you want. It won't be cheap.
Posting Guru
Joined: Oct 2006
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You are absolutely correct. I know with 4.10' or 4.30's my 6.0 would be a towing beast and would stay in OD in the hills! I just don't want the higher highway rpms when not towing... I will have to call ATS or Suncoast and see what they offer if anything................
Or I can install a 6 speed manual, which is what I would really like to do!! That seems that it would be pricey though! Anyone done this yet?
Or I can install a 6 speed manual, which is what I would really like to do!! That seems that it would be pricey though! Anyone done this yet?
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