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Discussion Starter #1
2006 CCLB 6.0 5R110 211k miles

I recently tuned my FICM and a note in the package said that with the higher levels of ficm tuning, it's recommended that you upgrade your 3-5 shift solenoids, the weak part of the 5R110 transmission.

Is it worth it? I only tow a car trailer with gear in the bed at most. Total weight of truck, trailer, car on the trailer, and gear in the bed is probably around 16k-18k pounds. So nothing too crazy. I know some people out there tow more than that in the 5th wheel trailer alone.

And if I do decide to upgrade the solenoid, which ones actually need replacing? The 3rd gear solenoid? I can't seem to find a straight answer, I've found a few write ups but they don't specify which solenoids control the 3-5 shift

https://performancetruckproducts.com/directsol-go-go-diesel-modified-direct-clutch-solenoid-ford-powerstroke-6-0l-6-4l/


My transmission doesn't have the 3-5 flare yet but I'm looking to replace the solenoid as a precautionary measure.
 

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Save your money it’s a useless upgrade IMO and I build these transmissions . I’ve never installed one. Use proper transmission tuning instead. My personal one was done almost 6 years ago and was tuned at the same and haven’t had a problem nor with any of the other I have built

WIth that mileage has however i wouldn’t be surprised if you develop issues with the added power if the trans has been 100% untouched
 

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Save your money it’s a useless upgrade IMO and I build these transmissions . I’ve never installed one. Use proper transmission tuning instead. My personal one was done almost 6 years ago and was tuned at the same and haven’t had a problem nor with any of the other I have built

WIth that mileage has however i wouldn’t be surprised if you develop issues with the added power if the trans has been 100% untouched
Got it, I went with the Atlas 40 tune, so I'm hoping it's not going to blow my trans. Mainly wanted better throttle response off the line and a bump in fuel economy.

Any thoughts on the dummy plug replacements? Upgrading the stock plastic one(s) to metal?

I thought these transmissions were pretty tough as far as longevity was concerned? I recently drained it, changed the filter and pan to a 6.4 set up and everything looked pretty good, normal amount of metal on the magnet and the fluid was dark but still red.
 

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Nothing needs to be done to the transmission plugs either
 

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They are stout transmissions. With the age and mileage of the transmission piston seal integrity becomes an issue as rubber deteriorates as it ages. Also the steel plates tend to start shedding metal around that mileage . The first sign of that will be erratic operation (small metal particles that hang up the shift solenoids. My trans lasted 6k miles after I added tunes (steel plates failed at 173k miles). I built with good parts and haven’t had a problem for the last 6 years and same goes for others I have done.

Your 06 doesn’t have pressure switches that’s need plugging so no need for that either.
 

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"resident smarty pants"
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Ive only seen those on the very eary models the late model ones don’t have them. Sometimes there is a plug in only one port but I have never touched one. Another useless thing to buy IMO

OP save your money for a nice overhaul kit. The best thing to make these transmissions live is proper tuning to go with the added power.
 
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