Att. Mark Kovalsky - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 6 (permalink) Old 01-03-2016, 03:39 AM Thread Starter
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Att. Mark Kovalsky

Hi Mark I`ve been reading some threads about swapping a 4R100 in my OBS. They did not say how there torque locked up and they changed nothing in the 4R100 they installed. Could you please tell me if this harsh TC lock up has to do with a PWM lock up or an NON PWM lock up. It looks like they used a stock or a built 4R100 with no changes.
Thanks Bill McIntire

97 F250 7.3 PSD SCLB 4x4 4.10L AUTO, DIAMOND EYE EXHAUST,,DIY 6637. E99 intercooler. 01 4R100 (Built), PCM DPC 422, D-66, 180/80 injectors, T-500 HPOP, E-fuel, DP-tuner F6 V2 chip with Jodys tunes, 290,000 and still going strong. Also live tuned by Jody
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post #2 of 6 (permalink) Old 01-03-2016, 01:06 PM
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Re: Att. Mark Kovalsky

The OBS and the early '99 used a NON-PWM lockup. The late '99 until the end of the 4R100 used PWM lockup.

If you put a PWM transmission where a non-PWM used to be the lockup is going to be very harsh. There is an orifice in the pump body that is either 0.030" or 0.040" (I can't remember which) and it's 0.250 in the PWM trans.

That doesn't seem like a big difference, but you need to look at the percentage difference. That's 1200% larger. that will bring on the converter clutch RIGHT NOW. Normally it takes 1-2 seconds to engage. Maybe they like it like that, or maybe they got lucky and used a trans with the non-PRM orifice.
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Mark
Former Ford Automatic Transmission Engineer

“The good thing about science is that it's true whether or not you believe in it.” ― Neil deGrasse Tyson
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post #3 of 6 (permalink) Old 01-03-2016, 05:12 PM Thread Starter
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Re: Att. Mark Kovalsky

Hi Mark Transgo makes a kit ( 4R100 Lu ) to change a 2001 to an on/off torque lockup. so if I use this kit and a E4OD or early solenoid body from an E 99 4R100 will this work. and can I just put these parts in my 2001 4R100 without changing anything else.
Thanks Again Bill Mc

97 F250 7.3 PSD SCLB 4x4 4.10L AUTO, DIAMOND EYE EXHAUST,,DIY 6637. E99 intercooler. 01 4R100 (Built), PCM DPC 422, D-66, 180/80 injectors, T-500 HPOP, E-fuel, DP-tuner F6 V2 chip with Jodys tunes, 290,000 and still going strong. Also live tuned by Jody
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post #4 of 6 (permalink) Old 01-03-2016, 08:20 PM
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Re: Att. Mark Kovalsky

Yes, that will work. You might need to use the earlier TRS, I don't remember if the later one is compatible

Mark
Former Ford Automatic Transmission Engineer

“The good thing about science is that it's true whether or not you believe in it.” ― Neil deGrasse Tyson
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post #5 of 6 (permalink) Old 01-04-2016, 12:45 AM
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Re: Att. Mark Kovalsky

Kudo's to Mark for apparently being on call now



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post #6 of 6 (permalink) Old 01-04-2016, 01:52 AM Thread Starter
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Re: Att. Mark Kovalsky

Mark Thank You Very Much for your time. Bill

97 F250 7.3 PSD SCLB 4x4 4.10L AUTO, DIAMOND EYE EXHAUST,,DIY 6637. E99 intercooler. 01 4R100 (Built), PCM DPC 422, D-66, 180/80 injectors, T-500 HPOP, E-fuel, DP-tuner F6 V2 chip with Jodys tunes, 290,000 and still going strong. Also live tuned by Jody
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