John Wood 4R100 Valve Body 7.3L Powerstroke 1996-2003
We offer modified accumulator valve bodies from John Wood Automotive because it is our experience that they are one of the best offered in the industry. John Wood has been building transmissions and valve bodies since 1983 and has a reputation for strong attention to detail, quality before quantity and excellent customer service.
A JW Valve Body will help to firm up shifting, while keeping the shifts crisp and not banging into gear. Also performs shorter shift duration, which decreases heat generated and reduces slippage and wear on the friction plates. While the valve body can be used with stock programming, we suggest a PHP Hydra if you are thinking of upgrading.
Please note that there is a 4 week window for core returns from when you receive the shipment. If the core isn't received back 30 days from customer receipt then your core charge will be forfeited.
Core Shipping Options:
- Pre-Ship Core - This allows you to ship your used cores in first without have to pay a core charge. Your order will ship once your cores are received.
- Return After Install - This is the quickest option to get your valve body. You pay the core fee up front and then it is refunded once the core is returned.
INSTALLATION NOTES: Installation of this valve body will require the use of an IN/LB torque wrench. If you don't have access to the correct tool, we recommend having a qualified mechanic perform the installation. Additionally, if your transmission has a lot of miles or years since the last rebuild, the Accumulator Body MAY stick to the Gasket, causing it to tear during disassembly. Caution must be taken to try to prevent this, but it is not always possible. If the gasket tears, the entire VB assembly must be dropped to replace it, and it is HIGHLY RECOMMENDED that the separator plate be dropped and the gasket between the separator plate and the transmission case also be replaced in this instance (which involves releasing the check balls). If you feel that this type of situation would be beyond your capability, we recommend having a qualified mechanic perform the installation.
46 Reviews Hide Reviews Show Reviews
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JOHN WOOD 4R100 VALVE BODY
Wow, all I can say is Wow! I had a horrible 3-4 shift flare as well as inconsistent shifts from 1-2 (some times normal, sometime hard) and this product smooth everything out and eliminated ths shift flare altogether! I am truly amazed. The truck shifts as smooth as a silk! I am in love with the truck again. Would highly recommend this product. Thanks to riffraff diesel for the quick shipping and technical support. A first class outfit!
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John wood valve body
Replaced original valve body with JW valve body because of no 2-3 shift. Had random sticking problems for almost a year now not putting the valve body as suspect. Replaced 2 sets of solenoid packs, dropped the pan several times, never finding any problems. About a month ago completely lost 2nd gear, thought it was transmission failure. Then the other day it randomly started shifting into 2nd. Dropped the pan, pulled the valve body and disassembled it. The paint on the valve springs, big yellow spring and big green spring, was flacking off the springs!!! The valves has scrape marks from trying to eat the paint. Soaked the springs in brake clean and removed all the paint and cleaned the valve body. Reassembled and after over a year of problems it shifts like a dream. Always inspect your products even if it's from a reputable source.
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Improved Shifting
This is how it should have been from the factory. Much better shifts, and no flare.
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John Wood 4R100 valve body
Great product !! Shift smoother and tighter!! My only regret I wish I would’ve installed JW valve body years ago!!
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Improved Shifting
Really improved my shifting and no more shift flare issues.
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Worth Every Penny
Installed fairly easily on my 02 Excursion 7.3. MY transmission was not having any issues prior to install, but I wanted a little extra security after other mods. Shifts are now immediate, and almost imperceptible by seat of the pants. I wish I had done this sooner.
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Poor performance
Original valve body had 2-3 shift sticking. Put this one in and as soon as the tranny gets warm it randomly sticks valves. Replaced the solenoids to eliminate that problem and no change.
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Perfect Shifts
My shifting is much tighter and concise. This is how it should have come from the factory. Recommend this highly if you want a good shifting transmission.
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Awesome
Highly recommend even with my tune still shifts smooth.
