Transmission, torque converter. 5r110 - PowerStrokeNation : Ford Powerstroke Diesel Forum
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post #1 of 2 (permalink) Old 08-21-2014, 05:33 PM Thread Starter
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Transmission, torque converter. 5r110

So. I bought my truck a year ago and I've had this problem since I tuned/dpf deleted it. It has gotten worse recently. When I drive it easy it shifts awesome. Nice firm shift torque converter locks in solid. If I step on it from a 30mph roll it will drag gears out way too long. Rev really high(like 3.5-4 rpms) and its not pulling like a tuned 6.4 should. I can't tell if the converter is locking or not. It smokes like a train the entire time. I've only held it til about 70mph because I'm scared I'm going to break something.

When I'm anywhere from half to 3/4 throttle it seems fine until I hit 50mph and the converter locks. It seems like it locks in, cant quite do it so it unlocks and locks in again instantly and surges/bucks violently. Once it starts bucking It won't stop til I let off because the bucking moves my entire body and starts a rhythm on the pedal.

I've learned how to drive to so it doesn't do it very often but it seem to be getting worse and I would really love to fix it. I had my innovative tunes updated and it didnt help a thing. it does it on all of the extreme tunes and all of My trans tunes.(early lock, stock lock, and delay lock). it does not happen on street or tow. I'm leaning towards the problem being the TC or transmission. The trans shift flawless at any other time on any tune. Any comments or answers welcome.
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post #2 of 2 (permalink) Old 08-21-2014, 06:01 PM
Former Ford Trans Engr.
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Join Date: Aug 2007
Location: SE Florida
Posts: 3,028
Re: Transmission, torque converter. 5r110

I'm leaning towards the problem being the tunes. If it were the transmission or the torque converter it would do it all the time, not just on certain tunes.

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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