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Old November 27th, 2015, 04:44 PM   #1
hghgrad
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Default Power stroke torque converter

Anybody had any issues with this? My 04 superduty started violently shaking yesterday around 50mph. Push the pedal down and it would go away.

Today, it started slipping in all gears. Barely made it back to the house.
Tow haul light started flashing.

Am I correct in assuming the is is a tc issue? I'm on a light street tune and I don't do much heavy towing, so I think a stock replacement is good enough for what I use it for.

Any brand recommendations? Trying not to spend a ton on this since I just spent $700 on parts rebuilding the front end. I've also got an injector going out right now also...so I don't see the need to spend $1300 on an upgraded unit.
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Old November 27th, 2015, 06:10 PM   #2
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Put a precision tripple disc billet back converter in it. I make around 600 at the wheels with 38s and it hold great. Also your truck has a factory tripple disc in it so basically youll just be adding the billet back and that gives alot of strength to it.
Also did you just change tunes? And how many miles are on it? 5r110s are very strong, but they do have a few weak points. Did you scan it for codes?
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Old November 27th, 2015, 08:09 PM   #3
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I've been running this tune for around 3 years. It's got 175k miles on it.

It's the street tune that came on my sct programmer. It was a pre head stud tune, so it's not super aggressive or anything.

No codes on the programmer, but the tow haul light came on and is flashing. I don't have any way to scan for trans codes.
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Old November 28th, 2015, 07:39 AM   #4
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Ok well the first place to go is get the codes pulled. That trans uses solenoids to shift and for pressure control. It doesnt have valves and check nballs like an old school trans does. You could have a solenoid issue but cant know without codes. Hows the fluid?
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Old November 28th, 2015, 06:45 PM   #5
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Haven't had a chance to check yet. I had enough time to get back to the house and grab a car and head right out again to try to get to work on time. Sump pump went out in the house when I woke up this morning, so I spent some time concentrating on that.


Hopefully I can check tomorrow. Guess I'll have to have it towed somewhere to get the trans codes pulled. Monday when I get off work maybe.
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Old November 29th, 2015, 12:05 PM   #6
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I drained the fluid today. It's pretty dark, doesn't smelled burned. There is some slivers of metal or clutch material in there, but not a ton.

I've got a temp sensor to replace in the trans and I'm going to attempt to refill with new fluid and see what happens. Worst case scenario is that I can drive it to the trans shop for a rebuild or back into the barn if I can find a good used trans and torque converter.
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Old November 29th, 2015, 02:50 PM   #7
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Make sure you use the lv or sp fluid whitchever ford reccomends
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Old November 30th, 2015, 04:45 PM   #8
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I pulled the pan and everything looked normal. Changed the temp sensor since I was already in there. No luck. It wasn't slipping for the first 5 minutes then it just seemed like it had a really bad clutch.

I'm not sure if I'm going to take it in to the shop or pick up a trans and swap it all in myself. More of a time issue than anything else really.
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Old December 18th, 2015, 04:36 PM   #9
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Trans ended up being toast. Picked up a used one and put it in.

After sitting, there was a ton of clutch material that settled out of the fluid. Mostly a fine dust but some slivers here and there.

Shop wanted $3400 for a rebuild. I got a low mile trans for $1000
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