New to the nation with 4r100 problems - PowerStrokeNation : Ford Powerstroke Diesel Forum
 
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post #1 of 2 (permalink) Old 07-30-2015, 01:35 AM Thread Starter
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New to the nation with 4r100 problems

I have a 99 f-350 with a 4r100 transmission. I am fairly new to a Powerstroke, but lost the transmission this last weekend and after all the threads I have read about them I am concerned. I don't tow a bunch but when I do I usually haul a cord of wood or a 3 horse slant trailer or the occasional side by side or four wheeler trailer. I usually pull about 2 or 3 times a month. I am curious if I need a built tranny or if a stock will hold up to what I use it for. I have looked at transmissions with sonnax valves and a upgraded valve body and triple disc t/c. Are these adequate for what I use it for? Also my stroker is completely stock and I plan on keep it that way. Any advice would be greatly appreciated.
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post #2 of 2 (permalink) Old 07-30-2015, 04:11 PM
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Re: New to the nation with 4r100 problems

A stock trans will hold up just fine with a stock engine.

To make the new trans live, scrap the air to oil cooler that's on the truck. It's contaminated and can't be cleaned well enough to reuse it. Replace it with a cooler from a 6.0L truck. It will bolt to the same mounts. You'll need two 3/8" - 1/2" adapters to connect the lines. Any hardware store will have these.

If you have a radiator cooler it probably can be flushed. Most of these are simply a coiled tube. If it is a small stacked plate cooler it needs to be replaced.

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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