Xrt pro: changing tranny schedule - Ford Powerstroke Diesel Forum
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post #1 of 5 Old 04-04-2012, 09:40 AM Thread Starter
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Xrt pro: changing tranny schedule

I have a xrt pro running pre-set setting. I want to change my tranny schedule. But my question is do I need to return my truck to stock setting before I download the schedule 2 tranny to my tunner or can I download it to the tunner without returning truck to stock first


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post #2 of 5 Old 04-04-2012, 10:21 AM
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no need to return to stock
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post #3 of 5 Old 04-04-2012, 02:23 PM
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just download, re-tune, and do a trans re-learn.
I run the S2L.

2010 F-250 CC/LB H&S Mini Maxx (Mild tune on 'HOT'setting with S2M trans schedule 1/2qt over), S&B intake, CCV Mod, Flo-Pro exhaust DPF/CAT, Firestone air bags front&rear. EGR coming off sooooon..
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post #4 of 5 Old 04-04-2012, 02:28 PM
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Has anyone experienced weird shifting issues on the S1M tune? If im trying to cruise down a highway betwen 40-55 and let off the motor will go all the way down to idle. So when i get back on the pedal it has to travel all the way up to 1700 rpms or so before it engages again. I switched to S2M and its so much better.
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post #5 of 5 Old 04-04-2012, 03:46 PM
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Quote:
Originally Posted by 04blackcrewcab View Post
Has anyone experienced weird shifting issues on the S1M tune? If im trying to cruise down a highway betwen 40-55 and let off the motor will go all the way down to idle. So when i get back on the pedal it has to travel all the way up to 1700 rpms or so before it engages again. I switched to S2M and its so much better.
actually thats the S1 tune characteristics (regardless of if it's L,M or H)
the tune has a 4th gear torque converter (TC) lock ....
You have two choices:

1 Pick a shifting schedule. There are 2 shifting schedules you will choose from.


Shift schedule 1:

1 2 3 4 4+TC lock 5+TC lock

Shift schedule 2:

1 2 3 4 5 5+TC lock

2 Pick a shift point Low, Med, or High

Shift schedule 1:
For Shift Schedule 1 tunes, the LOW, MED, and HIGH modifiers will affect the 4th gear TC lock point, 5th gear shift point, and the 5th gear TC lock point.

Shift schedule 2:
For Shift schedule 2 tunes, the LOW, MED, and HIGH modifiers will affect only the 5th gear torque converter lock-up point.

2010 F-250 CC/LB H&S Mini Maxx (Mild tune on 'HOT'setting with S2M trans schedule 1/2qt over), S&B intake, CCV Mod, Flo-Pro exhaust DPF/CAT, Firestone air bags front&rear. EGR coming off sooooon..
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