TRANSMISSION/ TUNING PROBLEM - Ford Powerstroke Diesel Forum
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Old 12-22-2012, 07:04 PM
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TRANSMISSION/ TUNING PROBLEM

Okay bought this truck about a month ago (first 6.4) normal driving it does great no problems at all. but most every time at wot or close to it i dont like how its shifting. 1-2 is fine and sometimes 1-2-3 but 3-5 the rpms raise between gears it takes a few seconds between gears and slams one it does go into 5th any one know what could be causing this? i checked the fluid today was bright red and at the right level called innovative diesel a week ago to see if it was something to do with tuning and i never really got a straight answer. just trying to see if i need to start planning for a new tranny or could it be the torque converter. really hoping it has something to do with tuning. i've been thinking of trying the up graded direct drive solenoid along with a fluid flush and new filters. i'm sure some ppl are tired of seeing my questions but i feel lost with this new truck. thanks for the help.

UPDATE. drove again tonight and at wot it feels as though it tries to shift into 5th twice.

Last edited by JD_MILLS; 12-22-2012 at 09:11 PM.
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Old 12-23-2012, 05:14 AM
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It could be th torque converter that may be why your feeling two shifts. One when it changes gears and 2 when the converter locks. Just an idea, good luck!
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Old 12-23-2012, 05:46 AM
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Its most likely not the converter. Some people have had good luck with putting a half quart to a quart of extra fluid in the trans.
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Old 12-23-2012, 06:50 AM
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If you can adjust the trans tuning to something else I'd try a different trans tune, also the extra half quart worked well for me...make sure the trans dipstick does not twist when putting it back in, if it does twist it might smear fluid and give you a off reading...
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Old 12-23-2012, 07:30 AM
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The gogo dd solenoid fixed that problem for me. Made the 3-5 shifts much firmer
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Old 12-23-2012, 08:09 AM
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My vote is trans is done. Slip banging isnt good neither is the flare between gears. Tuner+exhaust adds hp easily over 500 and stock trans dont last long with the amount if power these 6.4's can put down with basic mods.

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Old 12-23-2012, 08:24 AM
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Yeah when mine did a slip bang it was done. 4th and 5th slip a lot
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Old 12-23-2012, 10:28 AM
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Driving it now and if my rpms raise any so does my speed. Don't know if that makes a difference or not. Also it does it about every other time.

Sent from my SCH-I500 using AutoGuide.Com Free App
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Old 12-23-2012, 10:31 AM
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If it was the transmission or converter slipping would it throw a code?

Sent from my SCH-I500 using AutoGuide.Com Free App

Last edited by JD_MILLS; 12-23-2012 at 10:39 AM.
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Old 12-23-2012, 11:21 AM
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Quote:
Originally Posted by JD_MILLS View Post
If it was the transmission or converter slipping would it throw a code?

Sent from my SCH-I500 using AutoGuide.Com Free App
Usually, but not always. The towhaul will blink and store a code. Trans codes wont show up as a cel or be readable by an obd2 scanner. Need AE or the dealer tool.

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