Trany wont coast at speeds, decels hard like engine braking? is this right or not - Ford Powerstroke Diesel Forum
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Old 04-12-2013, 02:34 PM
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Trany wont coast at speeds, decels hard like engine braking? is this right or not

on F350 dauly with 410 gears. When running highway speeds when I decel it seems to coast then engine brake pretty hard. Im not sure if this is how they are or is the tranny not releasing to coast properly. When in town it does the same thing all all the way to about 15mph then it releases. AND if I bump the brake once any where below 50 it will just free wheel until I STOP. But if I just let off it free wheel s for a sec then engine brakes hard. KInda like if you let off in a stick coasted then droped the clutch in 1 gear two low for your speed.
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Old 04-13-2013, 05:27 AM
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I took my budy's for a drive and it did tit but not nearly as harsh. Just wandering if its the way the 410 gears are or what
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Old 04-13-2013, 05:38 AM
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Your discribing how my truck feels with the tow/haul feature engaged.
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Old 04-13-2013, 05:41 AM
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that's the first thing I said had our ford drive it and they said it wasn't engaged and was normal. THE reason I took it in the tranny is a new rebuilt they did about 1,000 miles ago and it has been doing it since.
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Old 04-13-2013, 05:45 AM
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the tow haul button works normal when pressed it down shifts and when released it shifts back up.
I have been having the tranny go into limp mode with vss code. had it fixed found it was the abs module. but since it has came back on once or twice since. then shut truck off and it went away.
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Old 04-13-2013, 08:04 AM
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My old 7.3l does that too, still havent figured it out why...


Subscribed!
Tom
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Old 04-13-2013, 05:59 PM
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The truck is going in and out of limp mode with vss error. It's funny because when its not in limp it's harsh and seems like it is a lot less harsh when its in limp mode. And the truck was doing this for awhile even when not having vss error .
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Old 04-16-2013, 08:22 AM
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truck seems to decal properly when its in trany limp mode. it reales when you let off and coast nicely down to a stop. When it goes back to normal not in tranny limp. It decels harshly, the opposite of what I WOULD EXPECT. I know the issues im having a hard to diagnose with the limp mode problem. But after spending $1,000 and not having my truck for over 2 months. Im having to wait to pay another shop to look at it. since I don't want to go back to where it was before.
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