TC Locked - Ford Powerstroke Diesel Forum
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Old 05-24-2014, 07:39 PM
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TC Locked

I pulled out on the street with my back tires spinning briefly, which is nothing new, but then I lost power for a few seconds afterwards, which hasn't happened before. The first thing that came to mind for this power loss was Traction Control, which I usually leave on, but I don't know why it would do this now because it's not my first time to spin out the rear tires. Anyway, I was looking around for some type of message and noticed "TC Locked" on my Mini Maxx next to the gear indicator. I drove around and kept seeing "TC Locked" appearing and disappearing on my Mini Max no matter if I had Traction Control engaged or disengaged.

Anyone have a clue what's going on here??? As a side note, my truck is lifted 8 inches in the front and 6 inches in the rear (waiting for new shocks before switching out blocks). I also have rear traction bars installed. Maybe this discrepancy has something to do with it?
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Old 05-24-2014, 07:42 PM
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I'm not a 6.7 owner but I'm assuming that TC locked is talking about your torque converter and not traction control.
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Old 05-24-2014, 07:44 PM
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Torque converter locked. Traction control has multiple stages on fords
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Old 05-24-2014, 08:27 PM
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Torque Converter! I see now. Why would this be popping up? I haven't seen it before. Do you think this would have something to due with the brief power loss I experienced?
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Old 05-24-2014, 10:19 PM
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holy $hit.
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Old 05-24-2014, 11:32 PM
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I tried doing it again and I'm thinking it's the Traction Control. I spun the tires with traction control off and experienced no power loss afterwards. I turned the traction control back on, but only experienced the power loss once out of three tries. Is that a normal part of the traction control feature?

Also, does TC Locked always show up on the Mini Maxx? Or is this abnormal? I haven't noticed it until now..
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Old 05-25-2014, 03:48 AM
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Its normal.
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Old 05-25-2014, 06:07 AM
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TC lock will show up whenever it locks, were you on and off the throttle, I know my 4th gear in the H&S tune will unlock the TC if I let off the throttle and lock it at soon as I'm back on the pedal. I haven't really paid attention to any other gears. Also watch your fuel rate on the monitor and spin the tires with traction control on, the engine defuels to get traction back, all in the name of safety....
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Old 05-25-2014, 06:09 AM
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Coming from euro cars with great Traction and stability control systems. That would jump in instantly with brake and power reductions. The ford system only comes in about 60% of the time with wheel spin. Maybe that's what you were feeling with the lost of power as the torque is reduced
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Old 05-25-2014, 08:12 AM
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That's normal but I read somewhere how to diss able All of the traction control when you want so the torque managements doesn't kick in.

And you want your torque converter to lock up. Atleast I do in each gear. Try in next time in manual mode.
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