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post #1 of 10 Old 09-26-2008, 07:00 AM Thread Starter
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Tranny Confused

Last weekend we went camping up in the mountians.
Well the raod up there is very curvy and very steep with a lot of on the throttle and off.
Well both ways the tranny seemed confused. The tow haul mode worked fine, but sometimes coming down a hill and then geting back into the throttle to climb another, the tranny would up shift fine, then bang on the the next up shift right after you started to get back into the throttle.
We were only doing between 25-45 the entire time. Towing around 16500 or so this time.
Temps were fine, power was fine minus the (2) regen cycles in 2 hours.
Before and after the hills, the tranny shifted fine, up and down shifting.
The truck only has about 3200 miles on it, 80-90% of that is towing.

Troy Simmons
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post #2 of 10 Old 09-26-2008, 12:28 PM
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Originally Posted by tbsimmons View Post
Last weekend we went camping up in the mountians.
Well the raod up there is very curvy and very steep with a lot of on the throttle and off.
Well both ways the tranny seemed confused. The tow haul mode worked fine, but sometimes coming down a hill and then geting back into the throttle to climb another, the tranny would up shift fine, then bang on the the next up shift right after you started to get back into the throttle.
We were only doing between 25-45 the entire time. Towing around 16500 or so this time.
Temps were fine, power was fine minus the (2) regen cycles in 2 hours.
Before and after the hills, the tranny shifted fine, up and down shifting.
The truck only has about 3200 miles on it, 80-90% of that is towing.
Well with as little miles as you have on the truck, it seems to me that truck hasn't had a chance to "learn" steep grade with your driving. You have have to becareful when your in tow/haul and letting off and on the throttle......if you let off the throttle and your still increasing speed rapidly, the truck will try to downshift to help brake the truck......but we need more info on the truck, like if its stock, what mods if any, where you on and off the brake too....

-Julian
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post #3 of 10 Old 09-26-2008, 04:19 PM Thread Starter
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08 F450 4x4
Stock Everything

Troy Simmons
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post #4 of 10 Old 09-29-2008, 07:25 AM
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Originally Posted by tbsimmons View Post
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Well if anything, take your truck to your dealer and describe the problem to them and see if they can possibly flash the truck with a update

-Julian
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post #5 of 10 Old 09-30-2008, 04:31 AM Thread Starter
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I think I will.
I am towing to the beach next weekend and see what it acts like through the mountains.
Thanks.

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post #6 of 10 Old 10-01-2008, 08:11 AM
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Originally Posted by tbsimmons View Post
I think I will.
I am towing to the beach next weekend and see what it acts like through the mountains.
Thanks.
No problem, keep us posted

-Julian
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post #7 of 10 Old 12-03-2008, 07:24 PM
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when i first got my truck,i hauled my 5th wheel which admitantly i overload and it is on occasion around 22000lbs. and i ended up in a campground that was down a 32% grade but when i got down there it was full. let me tell you , the climb back up was insane, 32% grade and 4 m iles long with a 25 mile/hr limit. i had it floored the whole way but about 1/2 of the way up the tranny started slipping and no matter what i did with the throttle it wouldnt go. I stopped on the side of the road and let it idle for about 10 minutes thinking it was too hot or something ,but then it has been fine ever since. i think it just needed to get a good *** kicking to break it in. just giver it'll be fine. and if something does break, get er fixed on warranty. its just that easy.

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post #8 of 10 Old 02-21-2009, 09:14 AM Thread Starter
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Update to this.
Well the truck has been better towing. Towed to the mountains and the beach and all is well over the hills, even with the updated program.
So to all with new trucks, drive the piss out of them so the tranny learns. I tow hard. SO I guess the tranny had to learn.

Troy Simmons
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post #9 of 10 Old 02-21-2009, 06:21 PM
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3500 miles is WAY long for the tranny to learn. If it acts up agin I would take it to the dealer.
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post #10 of 10 Old 02-23-2009, 08:09 AM
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Originally Posted by FX4STROKER View Post
3500 miles is WAY long for the tranny to learn. If it acts up agin I would take it to the dealer.
I agree.....

-Julian
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