slipping when shifting from 3 to 4 - Ford Powerstroke Diesel Forum
6.7 Tranny Problems 6.7 Tranny Problems

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Old 02-09-2014, 09:08 AM
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slipping when shifting from 3 to 4

I have a 2013 F350 that chirps when shifting to 3rd and slips ( rpm increases) before it engages 4 gear.
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Old 02-14-2014, 09:31 AM
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Same here
Sometimes going down a steep hill, if there is no throttle input, it clunks into fifth from third and it feels like it never finished shifting into fourth first
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Old 02-21-2014, 09:53 PM
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The cause is the transmission oil was contaminated by the antifreeze from the radiator. The result is the radiator and the transmission needed to be replaced. Lucky it was under warranty otherwise it would have cost $9700.
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Old 05-08-2014, 06:45 PM
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Hmm how bad was the tranny fluid? I so far have had the same issue once when I was really on it at WOT but I just figured it was cause the truck wasnt fully warmed up yet. Hasnt happened again since that first time.
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Old 05-11-2014, 06:30 PM
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Mine does it when it's cold. Warmed up it works great.
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Old 05-11-2014, 07:06 PM
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Yah mine just did it for the second time yesterday. I just changed to tune to so maybe that had something to do with it. Wasnt warmed up again this time either

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Old 07-01-2014, 12:42 PM
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Any resolve to this issue? Mine does it 4th-5th
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Old 07-01-2014, 02:44 PM
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Same here. Mine is from 4th-5th. It will make a metal on metal sound when downshifting from 5th to 4th when under load.
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Old 07-01-2014, 09:46 PM
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Pull the tranny dip stick and give it a sniff. It'll stink if it's burnt. As for metal in oil, if I remember correctly the tranny might have a drain plug. It'll be messy but you can prob pull a decent sample from the bottom of the pan. I re tuned and haven't had any issues. One WOT run my truck bucked in 1st, jumped into neutral and red lined until I let off and then got back into it. But I had TC on still and it was spinning like crazy so I think possibly I overloaded some sort of computers brain cause it never did it since then.
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Old 07-11-2014, 09:00 AM
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im tuned with spe motor and trans. my truck does it between 2-3 and 4-5 when its cold. its really starting to bother me. the 2-3 goes away when its warmed up but the 4-5 still happens sometimes when I'm getting onto it a little, like accelerating onto interstate. anyone have any suggestions? should i re tune or switch tunes? i forget where i read it but someone said there was an update from ford that would help?
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