tc locking/unlocking issue - Ford Powerstroke Diesel Forum
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Old 11-15-2011, 05:07 AM
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tc locking/unlocking issue

I saw a few post awhile back of this same thing but never found the right answer to fix the problem.

(does it with or without the chip hooked up)
Every now an then my TC acts up when I hit my left side blinker. I put a new pigtail on the tranny harness, didnt fix it. put a new blinker switch in no change again, Im guessing its a ground issue somewhere but im not sure.
also I have a TS chip reburned by BDP and sometimes on my hotter tunes when i get on it a little the TC will lock and unlock real fast keeps doing it till i back out. seems like the TC to me doesnt seem like the motor is cutting in and out.

any Ideas or thoughts...
thanks
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Old 11-15-2011, 02:29 PM
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I would suggest looking into your left tail lamp /stop lamp connections .The convertor will unlock when brakes are applied and it seems possible the PCM is picking up a signal that your brakes have been applied ,thus the unlocking .Also look into trailer harness if so equip .
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Old 11-17-2011, 08:43 AM
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Check/replace the center stop light/bulb in the roof of the cab.
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Old 12-10-2011, 04:51 PM
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tail lights and third brake light all work and are L.E.D with the resisters inline to simulate normal bulbs. i had this issuee with the stock lights too. thanks.
I have been playing with it and it doesnt unlock when i turn the turn signal on it happens right when i am lifting the lever back up to turn the blinker off. could it be the new switch is junk?
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Old 12-13-2011, 04:03 PM
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sorry to jack the thread but im havvin similar problems i think with my trans. does it do it when youre not hitting your blinker? my truck is shuttering almost like the fuel is cutting in n out while im driving but absolutley no change in rpm range.....think we got a similar problem?
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Old 12-14-2011, 06:47 AM
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Yes, mine will do it sometimes around 40mph. If im in my high hp tunes it does it more often. If i cant get this figured out im swapping in a zf5 and taking the e4od to a buddys tranny shop to get checked and possible rebuilt again then im selling it.
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Old 12-14-2011, 01:12 PM
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ok bud well let me know how you make out
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