Shifting too early!!!!! - Ford Powerstroke Diesel Forum
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  #1  
Old 02-05-2010, 07:15 AM
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Shifting too early!!!!!

What controls the shift points PCM or throttle potentiometer or what?

What do I check......this will roast the high gear clutches in a hurry?

Help!!!
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Old 02-06-2010, 06:09 PM
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tps,throttle position sensor, vss, vehicle speed sensor, ect, engine coolant temp sensor, brake switch.
How early??? Way early means the computer thinks it's in 4wd.
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Old 02-08-2010, 04:26 PM
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It will be in high gear before I can make it through a red-light. So what do I do break down and take it to Ford???
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Old 02-08-2010, 06:09 PM
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If you don't have a good local trans shop available.
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Old 02-09-2010, 05:35 AM
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Trans shop (performance transmission) tells me with their scanner that every thing is working properly that it is just getting the signal from the PCM too early.
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Old 02-09-2010, 09:20 AM
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That is correct. It thinks it's in 4wd low. I've never seen the problem but have heard others haveing it.
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Old 02-09-2010, 09:24 AM
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Wow thats crazy. Look for a PCM from a local yard with matching numbers. Or take it to ford and have them re flash it for 95 bucks...
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Old 02-09-2010, 09:57 AM
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PCM matching numbers purchased and on the way. I also have a P0605 (Rom Error) DTC code. I thought the truck might have been chipped or something. I pulled the PCM....took the cover off and no evidence of anything.....all silicone present and everything. I should receive it by thursday......I'll keep everyone posted.
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Old 02-09-2010, 12:52 PM
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(took the cover off, no evidence of anything) . '96 up computers are not 'chipped' anymore. They are reprogrammed thru the diagnostic connector.
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Old 02-20-2010, 08:45 PM
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Any up dates on this? I've got a truck that does the same thing.
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