Converter lockup - Ford Powerstroke Diesel Forum
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post #1 of 12 Old 06-07-2013, 03:22 PM Thread Starter
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Converter lockup

Is it good to lockup the torque converter 1st , 2nd ,and 3rd gear with an sct programmer

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post #2 of 12 Old 06-07-2013, 04:36 PM
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only in a race only tune and even then not in 1st.
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post #3 of 12 Old 06-08-2013, 01:30 AM
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PGreenSVT, what's your opinion on locking the converter in 3rd gear and up for better fuel economy? Is the tranny in any kind of danger?

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post #4 of 12 Old 06-08-2013, 04:26 AM
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I run my race tune as the daily driver...no issues

2004 F-350 SC 4x4, XLT, 4" dual Magnaflow, AFE intake, No Limit piping, spearco intercooler, water injection, ARP studs, hypemax o-ringed heads, SCT tuned by Innovative Diesel, tuned FICM, Hellman's sump, FASS, Fuelab, regulated return, 190/75 injectors, KC/MTW 68 w/.72ar, suncoast trans w/billet input, edge insight CS with dakota digital gauges, amsoil by-pass, BD exhaust manifolds
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post #5 of 12 Old 06-08-2013, 05:31 AM
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No there isn't a problem with locking the converter from 3rd on. I would expect it to adversely affect mileage and I personally don't have my converter locked unless I'm above 65mph.
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post #6 of 12 Old 06-09-2013, 01:08 AM
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Ok now I need to jump in here, I had my trans built and had a dual disc converter installed (it was free I guess a tech at the company failed to install it in another build-one of those its nice to know someone things) anyway he programmed my trans and locked the converter up in all gears should i change this with my SCT programmer?
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post #7 of 12 Old 06-09-2013, 04:27 AM
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You cant change lockup with the SCT. Your tuner has to do it in the tuning.

2004 F-350 SC 4x4, XLT, 4" dual Magnaflow, AFE intake, No Limit piping, spearco intercooler, water injection, ARP studs, hypemax o-ringed heads, SCT tuned by Innovative Diesel, tuned FICM, Hellman's sump, FASS, Fuelab, regulated return, 190/75 injectors, KC/MTW 68 w/.72ar, suncoast trans w/billet input, edge insight CS with dakota digital gauges, amsoil by-pass, BD exhaust manifolds
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post #8 of 12 Old 06-09-2013, 09:18 AM
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Well yeah that's what I meant I mean the program it so what should the correct lock up sequence be. I've really never understood torque converters to the full extent that I really wish I did or automatic transmissions I'm old school hot rodder from the 60's and 70's going to 4 speed on the floor

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post #9 of 12 Old 06-09-2013, 09:44 AM
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One of two ways...either early lockup or late. Early lockup will lock converter in 3rd 5th and OD. Where as late will only lock it up after OD.

2004 F-350 SC 4x4, XLT, 4" dual Magnaflow, AFE intake, No Limit piping, spearco intercooler, water injection, ARP studs, hypemax o-ringed heads, SCT tuned by Innovative Diesel, tuned FICM, Hellman's sump, FASS, Fuelab, regulated return, 190/75 injectors, KC/MTW 68 w/.72ar, suncoast trans w/billet input, edge insight CS with dakota digital gauges, amsoil by-pass, BD exhaust manifolds
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post #10 of 12 Old 06-09-2013, 12:37 PM
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What do you guys perfer? Im about to order a TW extreem tune, not sure about early lock up though. I will DD this tune if that changes things any.

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