4R100 Delayed 1-2 upshift - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 3 (permalink) Old 07-12-2015, 01:48 AM Thread Starter
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4R100 Delayed 1-2 upshift

Hello all. I have a 2000 Powerstroke Superduty with the 4r100 transmission. The issue is when I hammer the gas it seems like the transmission will be slow to shift to second. Almost like it hangs and then all of
A sudden drops in. If I drive normally (easy) it shifts better, but still soft. I just had the pan down to replace the fluid and filter (maintenance issue was occurring before this) The pan was spotless, just the normal stuff on the magnet. I have no fault codes stored, checked with Matco Scanner with Ford software. No O/D light flashing. Only thing I notice with my
Scanner is when checking the data stream of the transmission it say that the 1-2 and 2-3 shift solenoid electrical fault "yes" not sure what this means, but I have no faults stored in the PCM. It did seem to shift better after the filter change
And 9qts of new fluid but seemed to return to how it was. Truck has 185k on it. Thanks for any help and insight
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post #2 of 3 (permalink) Old 07-12-2015, 01:59 PM
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Join Date: Aug 2007
Location: SE Florida
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Re: 4R100 Delayed 1-2 upshift

There is no 1-2 shift solenoid, nor is there a 2-3 shift solenoid.

You could have a problem with the 1-2 accumulator valve. That's located in the accumulator body inside the pan, and the front.

Former Ford Automatic Transmission Engineer

ďThe good thing about science is that it's true whether or not you believe in it.Ē ― Neil deGrasse Tyson
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post #3 of 3 (permalink) Old 07-15-2015, 12:41 AM Thread Starter
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Re: 4R100 Delayed 1-2 upshift

Okay I am sorry, I stand corrected, just looked. Status on Data display is shift solenoid 1 and shift solenoid 2 electrical: Fault. I checked my buddies trucks and his status reads "no fault"
But I have no faults stores in the PCM.
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