Bad Torque Converter???
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Tuned
Joined: Jul 2004
Posts: 476
Likes: 5
From: Delaware
Bad Torque Converter???
What happens when a torque converter goes bad? Does it slip or does it lock up and not slip? Does it quit hooking up like a bad clutch or does it seize up and make the engine engage fully all of the time or what. Could it quit slipping at a lower RPM and make the engine lug like it's in too high a gear. What are all of the possibilities?
Posting Guru
Joined: Mar 2002
Posts: 1,942
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From: Willamette Valley, Oregon
Well first of all, It would be nice to know what we are working on to better help you with your application and as for ALL of the possibilities, there is really not enough room here to say.
Let us know what you are working on and we can be more help.
Let us know what you are working on and we can be more help.
Thread Starter
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Tuned
Joined: Jul 2004
Posts: 476
Likes: 5
From: Delaware
I'm working on my 90 Bronco with 5.0FI and AOD transmission. The transmission is slipping and needs rebuilding. But it was just a general inquiry concerning torque converters. What happens when a torque converter goes bad? Does it slip, lock up, or what. Even before my trans started slipping the truck acted as if it were in too high a gear. No power, as if you had a manual transmission and you were starting out in 2nd even though the trans started in low and went thru all of the gears. I just wondered if there could be a torque converter problem. What better time to change it if necessary if the trans was already being removed.
Posting Guru
Joined: Mar 2002
Posts: 1,942
Likes: 3
From: Willamette Valley, Oregon
well, I have seen them lock up and stall the engine, had the friction material disintegrate and fill the valve body and pan with debri causing all kinds of shifting trouble, had the solenoids and valves in the valve body stick and not allow shifts and torque converter functions, slipping, shuddering, delayed applications and a host of other troubles. A torque converter that fails can also damage the rest of the transmission by causing miss shifts, slipping and other valve/solenoid troubles with debri. It sounds as if you had early converter function and or the transmission trying to apply to gear sets at the same time, in theory.
I would DEFINITELY suggest replacing the torque converter since you are going to have the transmission rebuilt. It wouild be like changing the oil and not the filter.
Have you pulled the pan and checked to see what was in it? When you do make sure and pull the filter apart and see what is in side it also.
There are a number of other cause and effects that can happen, but these are mainly the basics.
I hope this information is a help.
I would DEFINITELY suggest replacing the torque converter since you are going to have the transmission rebuilt. It wouild be like changing the oil and not the filter.
Have you pulled the pan and checked to see what was in it? When you do make sure and pull the filter apart and see what is in side it also.
There are a number of other cause and effects that can happen, but these are mainly the basics.
I hope this information is a help.
Thread Starter
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Tuned
Joined: Jul 2004
Posts: 476
Likes: 5
From: Delaware
Jim, I just changed the fluid and filter in the transmission several months ago. I also drained the fluid in the converter at the same time. The fluid was clean, red, and not very dark. There was only the usual dirty film in the bottom of the pan, no real debris.
Posting Guru
Joined: Mar 2002
Posts: 1,942
Likes: 3
From: Willamette Valley, Oregon
You might check the connector to the MLP/TR sensor on the drivers side of the trans. disconnect it and see if there is any moisture in it. if so the sensor could be shorted inside. replace it and put dielectric grease in the connection to keep the moisture out. disconnect the battery for 10-15 minutes and then test drive.
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Tuned
Joined: Jul 2004
Posts: 476
Likes: 5
From: Delaware
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Posting Guru
Joined: Mar 2002
Posts: 1,942
Likes: 3
From: Willamette Valley, Oregon
it tells the computer how you have the shift lever set and what gear you want it to be in. if it has been compromised then it will send erroneous messages to the computer and cause concerns like those you have mentioned. Now that I have your concern info I am pointing to this being a possible cause and at least you should start with the little things first in your diagnosis. Have you had it checked for codes?
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