Torque Converter Slipping?
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Postmaster
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From: South Texas
Torque Converter Slipping?
My dad's 02 F250 (4x4, 5.4 V8,long bed, extended cab) has developed a noise when shifting from 2nd to 3rd. It's trannsmission code E (E4OD right?) It's intermitent and it isn't any kind of grinding or vibration, sounds like a rush of air or vacum. It occurs under smooth acceleration and doesn't seem to be affected by downshifting or OD on or off. Took it to the dealer (still under warranty) and their trannsmission tech drove it, he said it might be a troque converter problem, but can't start working on it till Mon, maybe.... Truck was bought with 19K and now has 26K, my dad hasn't done any heavy hauling or towing with it, don't know about previous owner. Anyone have any problems like this?
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From: Ohio
I have an 01 5.4 automatic that sounds similar. It sounds like the tranny almost revs up for a second and then it is fine. It happens on mine when I am out of the gas and then get back into the gas between 35 and 45 and 45 and 55 mph and between 1500 and 2000 rpms. I dont know what the problem is but am going to have the tranny flushed soon, (91000 miles). I am also curious if anyone else has this problem.
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From: South Texas
Yea, this sounds like the same thing. It happens exactly at 45mph (2nd to 3rd shift)
Have you ever had the tranny flushed before? I think its supposed to be every 30k.
My dad's only has 26k on it, hopefully it something minor and fixed quickly. Will update when it gets back from the dealer.
Have you ever had the tranny flushed before? I think its supposed to be every 30k.
My dad's only has 26k on it, hopefully it something minor and fixed quickly. Will update when it gets back from the dealer.
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Joined: Oct 2004
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From: Ohio
I have never had the tranny flushed. I bought the truck with 89000 on it. I dont think that it is supposed to even have the fluid changed before 30000. I have read some other threads and the torque converter was brought up. I hope you find the problem, mine doesnt do it all the time so I havent worried about it too much as it is not a daily driver.
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From: Georgia
If you are talking about the slight raise in RPM when you press the gas, after you have just let off the gas, it is only the torque converter locking back up. When you let off the gas the converter thinks you are wanting to coast. Press gas,lock-up. It's normal.
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From: South Texas
Originally Posted by high ho silver
If you are talking about the slight raise in RPM when you press the gas, after you have just let off the gas, it is only the torque converter locking back up. When you let off the gas the converter thinks you are wanting to coast. Press gas,lock-up. It's normal.
No this is not what it does. It's kind of a surge (heard not felt) at the end of the 2nd to 3rd shift under normal acceration. Once the shift is done you can let off the gas and then give it gas and it will not do it again. I won't do it if you slam on the gas from a stop either. Kinda hard to explain unless your in the truck.
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From: South Texas
Update....not Really..
Got the 250 back from the dealer, after almost 2 wks. in the shop. The transmision and torque converter were ruled out as the problem. The dealer claims it was the catalytic converter, so it was ordered and replaced under warranty. Drove the truck today and it still has that weird noise at the 45 mph shift point. I think it's slightly less noticeable now, but still there. We noticed that it doesn't do it until after 10-15 minutes of driving and all the temps are up to normal. Anybody got any ideas what this could be? If it still does it, it's going back to dealer!
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Squealing at 2200
I think I may have the same problem. I have a 2004 F250 c/c with 5.4L auto and 4x4. Mine happens pretty consistently in almost any gear (warm or cold), but most noticible when travelling about 70mph. Almost sounds like a diesel bus shifting (but its gas!).
I asked the dealer to look at it 2 times when I took it in for an oil change and was told they can't get it in the shop for at least a day (but that dealer is a whole nother story with service).
I read the comment about the torque converter locking back up and it being normal... is there a way to tell for sure before I waste anymore time at the dealer?
also, this has happened since I owned the truck (bought it new)
Thanks!
I asked the dealer to look at it 2 times when I took it in for an oil change and was told they can't get it in the shop for at least a day (but that dealer is a whole nother story with service).
I read the comment about the torque converter locking back up and it being normal... is there a way to tell for sure before I waste anymore time at the dealer?
also, this has happened since I owned the truck (bought it new)
Thanks!
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From: Home Base Nebraska
I think what you are felling is a normal 2nd to 3rd shift. when the trany shifts from 2nd it unlocks the converter and goes into 3rd and then runs unlock for a short period of time and then locks up the converter. I is more noticeable when you are pulling a load but it is still there without a load. It will also do it when it goes into OD when pulling a load. After a fluid change its not as noticeable but it still there, both of my SD have done it from new its just normal operation. If you ever pull a heavy load it will help when pulling because the converter acts like a toque multiplier and gives you a in between gear when after shifting.
Denny
Denny
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Postmaster
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From: South Texas
The noise was getting more prominent, so it went back to the dealer. Had it for another week and finally did find a torque converter problem. Replaced converter and tranny flushed. Sounds and feels good now, hope that is the end of that!
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From: 29 Palms, CA
Originally Posted by rvpuller
If you ever pull a heavy load it will help when pulling because the converter acts like a toque multiplier and gives you a in between gear when after shifting.
Denny
Denny
1-2 always good to go.
2-3 if I lightfoot it it'll shift first at 30 mph then at 40 mph I tap the pedal and whammo, TC locks... 3-4 (OD) at about 50.
2-3 If I heavyfoot it, TC will lock together with the shift at about 40 to 50 dropping RPM WAY low.... 3-4 (OD) when I let off the pedal some (50-65)...
TC problem or Tranny or solinoid??? I have Sonnax and Tricumulator... no diff..
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