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The back story is in another thread, but I need real world advice.
95 F150 4x4, 5.8l with the E4OD. Runs, shifts perfect, except for now and then throwing the TC slip code, 628, And goes into the hard shift limp mode. Zero symptoms and doesn't do it all the time. If i keep OD off, no issues and zero symptoms.
Assuming the TC is going, I called two different tranny shops, both said to rebuild the entire trans, which is NOT cheap. Is it taboo to just replace the TC? Whats the risk if the transmission is performing perfect, except for the occasional slip code/hard shift issue?
Why put a new TC on a used trans? The TC needs to be replaced when rebuilding and I am pretty sure with your symptoms you need a rebuild. So why pay labor twice and pay for a converter twice? Get a full drop in reman and move forward. If cost and value are a concern get the full trans from Fraser or Ford with a warranty.
Why put a new TC on a used trans? The TC needs to be replaced when rebuilding and I am pretty sure with your symptoms you need a rebuild. So why pay labor twice and pay for a converter twice? Get a full drop in reman and move forward. If cost and value are a concern get the full trans from Fraser or Ford with a warranty.
Let me ask why rebuild the whole transmission if it just needs a torque converter? I see posts about TC replacement with out rebuilding the transmission....just want to know if it really needs an overhaul or will it be fine with a TC?
Let me ask why rebuild the whole transmission if it just needs a torque converter? I see posts about TC replacement with out rebuilding the transmission....just want to know if it really needs an overhaul or will it be fine with a TC?
Dan
First of all it's better practice on here to continue your original thread instead of creating a new one, makes less clutter, all the info is there and easy to reach etc...
but to the point of the post, code 628 says 'torque converter' in the description, sure... here's the thing though, it's monitoring that lockup, comparing sensor data against it's internal logic to see if there is slippage ... only above 30ish MPH and only in third or fourth gear, because that's where it locks up 99.9% of the time. to me that says it's also possible that 3rd and 4th are worn, whatever clutch packs those use... so could it be the torque converter? yes. but point is (correct me if I'm wrong, someone like Mark maybe) that 3rd and 4th can also be the culprit because that's the time when TC is engaged.
however, we are just disembodied voices on the internet, we could be totally wrong because we can't look/see/diagnose things with just a keyboard. and if you yourself can't diagnose the actual cause then have an experienced transmission tech give it a look, pay your diagnostic, and then do whatever repairs the tech recommends.
Code 628 is only set in fourth gear with the torque converter locked. While it is possible that the overdrive clutch is worn and causing this issue, it isn't likely. You'd see a long 3-4 shift and get a code for a 3-4 shift error if it was the overdrive clutch.
The E4OD converters in this era were known for developing cracks in the torque converter clutch apply piston. This causes the exact symptoms you're seeing. I'd take the chance and just replace the torque converter and not rebuild the trans.
Never put a used torque converter in a new or rebuilt transmission. There is no reason why you couldn’t only replace the converter without rebuild the transmission. The worst part is sending clutch material into the trans which really isn’t problem. It’s not like the bad converter sent metal particles into the trans.
Never put a used torque converter in a new or rebuilt transmission. There is no reason why you couldn’t only replace the converter without rebuild the transmission. The worst part is sending clutch material into the trans which really isn’t problem. It’s not like the bad converter sent metal particles into the trans.
You confused me a bit, and I'm not sure if I'm just confused, or not getting the sarcasm.
I'm not wanting to out a used TC in a new trans, rather a new TC in the existing trans.
I'm not wanting to out a used TC in a new trans, rather a new TC in the existing trans.
Dan
I was saying you should never put a used/ reuse a converter in a new transmission because it can destroy it. AFAIK, there is no way to completely flush it out. What you want to do should be fine. If the transmission is good then just replacing the converter is perfectly fine. In fact I did that very same thing in my Bronco II. I had the shop replace the converter while it was out to replace the pump seal and bushing.
Lets narrow down the problem, and check out a few things.
Is the truck a F150 or F250?
Changed anything in the truck, like LED brake lights, and does the third brake light in cab work?
Check the wire harness to/from trans, make sure its in good/clean shape.
I think the reasons trans shop say to do a 'complete rebuild', is that they won't miss anything, and all parts get refurbished.
Check your solenoid pack, right now you have an intermittent problem, could be dirty fluid, and solenoid pack not activating TCC firmly enough.
I rebuild my trans myself, took 6-months part time, cost $1200-1500 CAD with new torque converter.
What I did when my trans was giving me issues, and was recommended that the TC was bad, after I took the trans out, I took TC to a shop, had them open it up.
Once TC open, you can see if it is bad or good. My TC was good, so trans had to come apart. If the TC was bad, I probably would have left the trans, and just swapped the TC.
The issue of just putting a TC in, is if the trans starts to go, you may have to rebuild TC again.
Well I've been driving the truck over the last few days trying to get the trans to act up. Its just acting perfect. I can't get it to replicate the limp mode/ code 628 issue. The rear of the pan is leaking and the gasket looks sketchy. Bell housing has a small drip, maybe from the seal? Its not bad like a drip a day, leaving a quarter size wet spot, compared to the rear that leaves a saucer sized wet spot when parked for a while.
I'm thinking dropping the pan, changing the filter and fluid, resealing the pan with a good gasket, inspect and clean up the connection plug (very dirty) and see how it goes. Anyone have any other thoughts?
...95 F150 4x4, 5.8l with the E4OD. Runs, shifts perfect, except for now and then throwing the TC slip code, 628, And goes into the hard shift limp mode. Zero symptoms and doesn't do it all the time. If i keep OD off, no issues and zero symptoms.
Assuming the TC is going, I called two different tranny shops, both said to rebuild the entire trans, which is NOT cheap. Is it taboo to just replace the TC? Whats the risk if the transmission is performing perfect, except for the occasional slip code/hard shift issue?
Went through this for several years. Multiple 600 trans codes that would come & go. In & out of limp at random with varying length of time between issues.
Finally began to slip at constant speed & acceleration (like going into neutral) & displayed NO codes. Had trans & convertor professionally rebuilt.
Multiple problems when re-installed.
Was leaking capacitors in computer along with faulty PSOM.
Check the computer, check wiring going into trans, check MLPS, test solenoids.
Or you can rebuild it, THEN check out these things.
I don't think you can tell if a TQ has been overheated by looking at the outside.
How does the fluid smell, burnt or not burnt?
That TQ looks like a rebuild, they didn't even paint it!!
There is the voice of the unknowing!
I can tell if a converter has been slipping and overheated by looking at it. This one has not been overheated. One that has been slipping will have bluing similar to a blued gun color.
Ford does not paint ANY torque converters. EVERY torque converter leaving a Ford factory is unpainted. Many places that rebuild converters paint them. So if it is painted you can count on it being a replacement.
I can tell if a converter has been slipping and overheated by looking at it. This one has not been overheated. One that has been slipping will have bluing similar to a blued gun color.
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