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Old 04-29-2012, 03:31 PM
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Question Auto transmission shifting rpm in tow/haul mode

My Diesel F-350 when in tow mode wants to shifts speeds at 2500 rpm. Is this normal? Normally the transmission shifts at around 1700 to 2000 rpm when in overdrive. Also do I need to even use the tow/ haul button when haul firewood load in the bed of the truck? My 2nd F-350 is a manual 6 speed, so this is new to me. Want would the normal rpms be with a 6.0 liter diesel engine with automatic transmission?
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Old 04-29-2012, 03:53 PM
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That sounds completely normal. The whole point of Tow/Haul mode is to lock the torque converter longer to give you more power on tap while towing/hauling.
I always use Tow/Haul when I haul over 1,000 pounds of stuff or towing anything.


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Old 04-29-2012, 03:56 PM
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Quote:
Originally Posted by Labrador Dave View Post
My Diesel F-350 when in tow mode wants to shifts speeds at 2500 rpm. Is this normal? Normally the transmission shifts at around 1700 to 2000 rpm when in overdrive. Also do I need to even use the tow/ haul button when haul firewood load in the bed of the truck? My 2nd F-350 is a manual 6 speed, so this is new to me. Want would the normal rpms be with a 6.0 liter diesel engine with automatic transmission?
I don't pay attention to my tow haul shifting, but I only use when towing my boat and camper ,it will downshift at speed and hold you back towing down grades so you don't have to use your brakes hardly at all just touch brake and it will downshift and hold you right there, saves my brakes.
And it also holds the gears longer to give you more pulling power.
Jer
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Old 04-29-2012, 04:18 PM
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Thanks for the reply. That's a relief. I was getting concerned something was going out on the truck. Anything related to the 6.0 diesel is $$$$$. My other F-350 had the EGR system blow. Wasn't a low cost repair by any means.
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Old 04-30-2012, 07:27 PM
mxc mxc is offline
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completely normal. the autos in the 6.0's and up are a lot stronger than the older 4 spds in the 7.3s too.
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Old 04-30-2012, 09:40 PM
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Smile

Thank You for the quick reply
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