tc lock up - Ford Powerstroke Diesel Forum

 
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post #1 of 8 Old 01-02-2008, 01:13 PM Thread Starter
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tc lock up

when is the best time to manually lock the converter under normal driving and whens the best time while towing, thanks
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post #2 of 8 Old 01-02-2008, 01:49 PM
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I lock mine when I am in the foothills above 1600rpm when running solo and no one is behind me. If there is someone behind me I keep it around 1900rpm, it is a smoke thing. My injectors flow too much fuel down low and it will smoke three lanes out behind me if I don't watch how low I lug it.

When towing I don't like to force a lock until 2400rpm or so. You need to have enough RPM to spool the turbo so if you lock it too soon the engine lugs and smokes like crazy.

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post #3 of 8 Old 01-02-2008, 04:22 PM
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does it make your o/d light flash? How much cooler will this keep the trans?
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post #4 of 8 Old 01-02-2008, 04:24 PM
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How about driving with a mostly stock truck, normal everyday unloaded driving???

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post #5 of 8 Old 01-02-2008, 05:24 PM
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Yes it will make your OD light flash. With a stock trans I would see over 40* drop in trans temps while towing at lower speeds where the TC would not lock-up.

Early 99 (Born on 11-20-98) F350 CC LWB 4X4
north of 480hp and south of 13.7sec
Bored with current setup

Sled Pull and Drag Racing Videos

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Family of 5 saved by Grace.....

Sponsored by Left Coast Diesel in Concord, Ca

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post #6 of 8 Old 01-03-2008, 03:53 PM
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nice. will the flashing light hurt anything or is it more of an eyesore? what is that flashing light supposed to mean
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post #7 of 8 Old 01-03-2008, 04:06 PM
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what exactly is a tc lock up

24v that drinks like a 12v
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post #8 of 8 Old 01-03-2008, 09:14 PM
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The flashing light is saying the PCM does not think it should be locked. It will not hurt anything.

The TC lock, locks the TC.

Early 99 (Born on 11-20-98) F350 CC LWB 4X4
north of 480hp and south of 13.7sec
Bored with current setup

Sled Pull and Drag Racing Videos

<><
Family of 5 saved by Grace.....

Sponsored by Left Coast Diesel in Concord, Ca

Anything BUT Conservative Performance
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