Torque converter lock out
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Joined: Mar 2004
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Torque converter lock out
I have an 99 F-250 V10 and the torque converter is slipping/shuttering when engaging. I drive it occasionally and do not do any serious hauling anymore. Is there a way to keep the torque converter from locking? Need just a simple mod, don't even need a switch in the cab to go back and forth.
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Joined: Jun 2008
Posts: 2,564
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From: Wayyy NoCal, USA
I believe you can just cut the purple/yellow wire going between PCM and TC clutch solenoid.
This article has more details on the wire in question:
http://67.19.132.3/dieselinnovations...s/tclockup.pdf
I just noticed you have a '99. Ours did NOT come with a trans cooler in the radiator - all it has is the single external cooler. I found this marginal on hot days, even when not towing. In 2000, Ford added a loop through the radiator.
If you no longer have lock up, the trans is going to generate a lot more heat. Definitely add a temp gage and watch it. I suspect you will need to add additional cooling - either swap in a new radiator (I believe all replacements will have the trans cooler plumbing) or add additional external coolers.
This article has more details on the wire in question:
http://67.19.132.3/dieselinnovations...s/tclockup.pdf
I just noticed you have a '99. Ours did NOT come with a trans cooler in the radiator - all it has is the single external cooler. I found this marginal on hot days, even when not towing. In 2000, Ford added a loop through the radiator.
If you no longer have lock up, the trans is going to generate a lot more heat. Definitely add a temp gage and watch it. I suspect you will need to add additional cooling - either swap in a new radiator (I believe all replacements will have the trans cooler plumbing) or add additional external coolers.
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02GrayPowerStroke
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Mar 11, 2010 11:33 AM
