How much weight before T/H mode? - Ford Powerstroke Diesel Forum

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post #1 of 12 Old 07-27-2014, 06:45 PM Thread Starter
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How much weight before T/H mode?

Would like to ask everyone how much weight they think we can haul in the bed before I NEED tow/haul mode? Thanks

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post #2 of 12 Old 07-27-2014, 07:06 PM
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I wouldn't say there's any magic number where you need tow/haul mode as far as payload goes. Just try it the next time you've got a good load and see if you like it is the best advice I can give you.
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post #3 of 12 Old 07-27-2014, 07:59 PM
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Haaa this is a fun topic I usually don't engage tow haul till at least 5k+ and sometimes when im going thru neighborhoods or parking lots with a lot of weight ill still keep it off but limit my gears to 3rd or less cuz im deleted and sometimes its just obnoxious holding 2k going thru a parking lot or in my neighborhood at night as im coming home .

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post #4 of 12 Old 07-27-2014, 08:13 PM
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All personal preference. It won't hurt anything towing 15k without it or 2k with.

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post #5 of 12 Old 07-27-2014, 10:47 PM
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T/H mode increases the line pressure allowing for firmer/quicker shifts at an elevated RPM. When loaded down this allows you to accelerate/maintain speed with out the transmission hunting up and down for a gear.

It will do no harm to run the truck with it engaged. I run with it on and my exhaust brake on all the time with my '08 Cummins. When I had the transmission serviced at 105K the diesel mechanic at the dealership was amazed how clean the pan and filter were. He asked me if I had ever had the transmission serviced. I told him how I run and he smiled.

If you run it all the time you will consume a little more fuel and it will shift firmer...not buttery soft. The soft shifting means the clutch packs are slipping longer...causing more wear. Your transmission will also run cooler as the slippage causes heat as well.

The Cummins exhaust break actually pulls down the speed whether loaded or not...also alleviating brake wear. I had the front brake pads changed at 110K...the rears at 161K are still going strong. I've pulled a 14K lbs 5er about 20K of the total miles.

From what I understand, the Ford EB doesn't work the same way...but i could be wrong...
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post #6 of 12 Old 07-28-2014, 05:32 AM
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Up to 2014 the Ford auxillary braking was different and useless. 15+ have the exact same style EB as the Dodge. I find a lot of people prefer the TH mode just for the shift pattern change even for daily driving.

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post #7 of 12 Old 07-28-2014, 08:17 AM
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I find that Tow Haul mode helps a lot when decelerating. I tow a 15k+ 5th wheel and it downshifts faster to take a lot off of the brakes.

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post #8 of 12 Old 07-28-2014, 08:19 AM
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Per 2015 Owner's Manual

Tow/haul delays upshifts to reduce frequency of transmission shifting. Tow/haul also provides engine braking in all forward gears when the transmission is in the D (Overdrive) position; this engine braking will slow the vehicle and assist the driver in controlling the vehicle when descending a grade. Depending on driving conditions and load conditions, the transmission may downshift, slow the vehicle and control the vehicle speed when
descending a hill, without the accelerator pedal being pressed. The amount of
downshift braking provided will vary based upon the amount the brake pedal is pressed.

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post #9 of 12 Old 07-28-2014, 08:21 AM
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Quote:
Originally Posted by Larry1013 View Post
Per 2015 Owner's Manual

Tow/haul delays upshifts to reduce frequency of transmission shifting. Tow/haul also provides engine braking in all forward gears when the transmission is in the D (Overdrive) position; this engine braking will slow the vehicle and assist the driver in controlling the vehicle when descending a grade. Depending on driving conditions and load conditions, the transmission may downshift, slow the vehicle and control the vehicle speed when
descending a hill, without the accelerator pedal being pressed. The amount of
downshift braking provided will vary based upon the amount the brake pedal is pressed.
Bingo, great posting.

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post #10 of 12 Old 07-28-2014, 10:12 AM Thread Starter
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So let's say 1000lb in bed. I run with T/H on and I'm tuned/deleted, so it shifts firmer natrualy. Am I good to drive without pushing the button?

I feel like it will be fine but I heard you can reck your tranny.

Thanks for replies guys.

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