4R100 rebuild - Ford Powerstroke Diesel Forum
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  #1  
Old 05-18-2014, 04:31 PM
Johnny Law Brown

 

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4R100 rebuild

Im getting ready to rebuild my 4R100 and I am wanting to make some modifications to the pump. Can I change the pump from PWM to non-PWM for the on-off converter lock-up. I know I would also have to change the solenoid pack. But is it feasible and would I gain anything.

P.S. I know some of you guys are going to say just get a BTS or JWT transmission well if I had your money I would.
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Old 05-18-2014, 11:32 PM
Compression Ignition Addict
 

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i think revmax sells a good rebuilt kit.
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Old 05-19-2014, 12:40 AM
Rodslinger's B1TCH
 

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i've heard of this being done. i think the reason they switched to pwm in '99 was because of the sudden jolt of torque being applied during non-pwm lock up was harder on the rest of the transmission. if you're not upgrading everything else, it might be a good idea to leave it as pwm.

i'm thinking that the built transmissions like BTS are non-pwm but everything else is upgraded at the same time.
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Old 05-24-2014, 04:51 PM
Johnny Law Brown

 

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That's my plan is to upgrade everything I'm trying to build a competitive unit to bts without the price.
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Old 08-30-2014, 05:25 PM
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The Makings Of A Bulletproof Ford 4R100 Transmission - Diesel Power Magazine

here is a good article from diesel power mag about John Woods and his bullet proof 4r100. Be sure to check the photo section as they go through all the stuff he is doing on the trans.

I understand about doing it your self but something, to me transmissions, are best left to experienced guys like Brain and John and the likes.

good luck
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Old 08-30-2014, 06:32 PM
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If you change the valve in the pump you can change to pwm or non. You will find that when you source the parts.. $1200 for a converter (the precision Brian uses for example) transgo for $100, hardened shell, a good kit with quality lining is guna cost $5-700 with no brass (most of them) you will have $2000 in parts with no billet shafts or anything. One tranny a day would be impressive IMO. If I do one it takes me 3-4 days start to finish. Maybe I'm slow or too picky but I've never had to take one apart again. So if you tie a couple days up doing one you will have $2500-$3000 invested. Anything less wouldn't be a BTS type IMO
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