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Old 08-11-2016, 02:51 PM   #1
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lockout 6th

Anyone else use the manual setting to lockout 6th on their tow vehicle? I have 6.0 with 4.10 gears. Seems to save trans from shifting alot.
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Old 08-11-2016, 03:59 PM   #2
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I do only when running through hilly terrain.
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Old 08-11-2016, 04:17 PM   #3
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Anyone else use the manual setting to lockout 6th on their tow vehicle? I have 6.0 with 4.10 gears. Seems to save trans from shifting alot.
Hey John, I'm not aware of Ford using a 6-speed automatic in their 6.0L diesel's. I have a 2006 and believe all between 2003-2007 had the 5w110 5 speed Torqueshift automatic trans.
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Old 08-11-2016, 04:26 PM   #4
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Hey John, I'm not aware of Ford using a 6-speed automatic in their 6.0L diesel's. I have a 2006 and believe all between 2003-2007 had the 5w110 5 speed Torqueshift automatic trans.
I tow with a Ram 2500 4wd
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Old 08-11-2016, 04:37 PM   #5
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I guess I'm trying to figure out why you would want to.With a 4.10 final you will be turning the motor around 2300 @ 55mph. Thats about 300 rpm past the torque curve(actually on the back side of it).The Cummalong likes 1500 -1800.My son has one so I am speaking from experience.Your 6th which is an OD is maybe 15% over? that would seem about right to me.
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Old 08-11-2016, 04:44 PM   #6
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With my Ram, I will lock out 6th gear when the EGT's start to climb when pulling a 6% slope or greater. I will lock out the transmission as the EGT's reach 1100F or greater temp. I will then pull in 5th gear for the rest of the slope, but the truck transmission does not hunt at all. I will shifting back into 6th gear at the bottom of the slope. I am also in tow haul mode 100% of the time when towing any load with the exhaust brake on. I have driven this way ever since I purchased my 2008 Ram new in Nov 07.
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Old 08-11-2016, 04:51 PM   #7
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I tow with a Ram 2500 4wd
Gotcha!
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Old 08-11-2016, 05:02 PM   #8
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Mine is 6.0 gasser (vortec) not a diesel. Mine likes to jump from 6th to 5th more than I like. I locked out 6th n it seemed to tow way better.
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