2012 F-350 shifting problem
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More Turbo
Joined: Oct 2009
Posts: 655
Likes: 18
From: Randolph County NC
2012 F-350 shifting problem
My Father In-law has a 2012 f-350 Dually with 4K miles. He tows a 9K lb camper and until our last trip the truck ram flawlessly.
On our return from Myrtle Beach to central NC we were on a freeway traveling at 63 MPH and his tranny would not shift into 6th gear. Tow haul was on. There was some headwind (10MPH) but no large grades or any reason we can think of not to allow an up shift. His display did show a countdown to empty of the exhaust fluid 450 miles to empty.
He took the truck in for service and no codes were found. Dealer did not find any TSB's addressing the tranny issues.
Is the sixth gear up shift in tow haul set very conservative? Does it hold 5th unless the load is below a certain value?
Other trips we have been on have been mountain towing so 6th gear shift would have been on down hill or level sections.
Any info is greatly appreciated. Dealer wants us to bring it to them when it won't up shift next time but dealer is not along a freeway.
On our return from Myrtle Beach to central NC we were on a freeway traveling at 63 MPH and his tranny would not shift into 6th gear. Tow haul was on. There was some headwind (10MPH) but no large grades or any reason we can think of not to allow an up shift. His display did show a countdown to empty of the exhaust fluid 450 miles to empty.
He took the truck in for service and no codes were found. Dealer did not find any TSB's addressing the tranny issues.
Is the sixth gear up shift in tow haul set very conservative? Does it hold 5th unless the load is below a certain value?
Other trips we have been on have been mountain towing so 6th gear shift would have been on down hill or level sections.
Any info is greatly appreciated. Dealer wants us to bring it to them when it won't up shift next time but dealer is not along a freeway.
Senior User
Joined: Apr 2010
Posts: 102
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In tow haul it is relatively hard to get it to upshift to 6th while towing. You have to be on flat ground with little head wind and eas off the throttle until it shifts then you can get back in to the throttle. Or you can manual shift it to 6th in M mode
FTE Legend
Joined: Mar 2009
Posts: 161,105
Likes: 8,089
From: North Bay Ont Canada
In tow/haul the truck keeps the RPM up & ready for some throttle (pulling) so if its in 6th the engine gets lazy (low RPM).........so it wont shift up unless it's at high speeds on level ground........
Posting Guru
Joined: Nov 2010
Posts: 1,783
Likes: 1
From: WY
Yep, yep, yep, and more yep. I agree with all the above. While in T/H mode, the shift points are adjusted to keep the RPM's in the upper envelope of the individual shifting range of each gear. When I want it to upshift and it keeps hanging on to the higher rpm's longer than I want, I just disengage T/H, then re-engage it for the down-grade braking feature, or to get ready for the next uphill.
FTE Chapter Leader
Joined: Jan 2006
Posts: 21,345
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From: North Central Washington
How do you lock it out of 6th gear?
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Lead Driver
Joined: Nov 2011
Posts: 9,544
Likes: 43
When your in auto mode (D), just press the minus button on your gear selector. The 6 will disappear, showing that its locked out
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Lead Driver
Joined: Jan 2010
Posts: 6,600
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When you're in manual mode, you'll notice the transmission only downshifts on it's own to 2nd gear which is nice when empty.
Elder User
Joined: May 2010
Posts: 502
Likes: 3
From: North Georgia
I love the way they up shift but down shift while on cruise can be harsh.
I've seen it go from 6th to 4th on a small down hill stretch. I wish it could just let off the gas and let it coast more.
I've seen it go from 6th to 4th on a small down hill stretch. I wish it could just let off the gas and let it coast more.
Lead Driver
Joined: Nov 2011
Posts: 9,544
Likes: 43
I press the cancel / resume button when coming up to a steep down hill, let the truck coast and press resume at the bottom of the hill.
Elder User
Joined: May 2010
Posts: 502
Likes: 3
From: North Georgia
Makes sense, if I'm not paying attention, (six daughters in the truck) it's wham, throw me forward against the seat belt and it's done down shifting.
I've got to pay more attention to the hills.
