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Old 09-21-2014, 02:56 PM   #1
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HI, I am new just posted this question in new member, give me some time and I will figure this site out.

I have a 2003 Hemi 4x4 V8 3.73 Quad cab 48,000 miles and I pull a 3 horse gooseneck trailer w/LQ 6480# My horse is 1,000# my wt. limit on pulling is 8700.
QUESTION: When pulling hills I want my OD off right? and on when going down hill? Do I also need to shift down to 2nd when going down if trailer seems to be pushing me? I am new to this hauling a heavy trailer.
Any help please.
Thank you.

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Old 09-21-2014, 03:05 PM   #2
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When I tow heavy I always turn off my overdrive. unless im on a very long flat hwy. seems to work for me
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Old 09-21-2014, 03:52 PM   #3
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i would leave it on,, it changes shift points in trans, the computer opt best power demand at engine rpm vs fuel economy, i keeps the trans form shifting back and fourth between gears, i use it all the time, even when NOT healing or towing, it helps gear the truck down going hills keeping it with in 5 miles of the speed i set on my cruse control
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Old 09-21-2014, 04:00 PM   #4
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by the way the, tow heal button doesnt turn off the overdrive it basically changes the shifting in the trans,,, the computer chooses a different pandered totally, for power and torque needs vs fuel economy
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Old 09-21-2014, 04:44 PM   #5
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John, I think you got the idea right, but the terminology backwards. OD is normally ON and then manually can be turned off on the 03. For heavy hauling or racing and playing hard it is best to turn the OD off. Never do a WOT downshift without first turning off the OD. To have a 3:73 gear I'm assuming you have a 2500. Welcome to the forum.
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Old 09-21-2014, 06:20 PM   #6
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Use tow haul of you have it and let the truck do it's thing. Going up big hills it will never hit OD from load demand. Going downhill tow haul will downshift and eng brake itself sorta. If you don't have tow haul run OD off unless on a long nice straight road at cruise then turn back on.
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Old 09-21-2014, 07:47 PM   #7
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Quote:
Originally Posted by charged392 View Post
Use tow haul of you have it and let the truck do it's thing. Going up big hills it will never hit OD from load demand. Going downhill tow haul will downshift and eng brake itself sorta. If you don't have tow haul run OD off unless on a long nice straight road at cruise then turn back on.
That's the way I use it. I was referring to overdrive for towing
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Old 09-21-2014, 08:20 PM   #8
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Old 09-21-2014, 09:52 PM   #9
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Old 09-21-2014, 10:49 PM   #10
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