5r55e problems
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Cross-Country
Joined: Oct 2010
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From: Knoxville TN
5r55e problems
I am trying to diagnose and fix my transmission problems in a 2001 Ranger, 4.0 SOHC 4wd. I purchased it with known problems and did a complete rebuild. New valve body, clutches, servos. Put in new ODS and OSS speed sensors. But not working. I think there is an electrical problem. I have a scan tool that can show live data. There seems to be an issue with the ODS (overdrive drum sensor) I believe because the readings from it seem bad. When in park at idle, RPM and input shaft are close to same readings. OSS is 0 as I expect it to be because it is not moving. However ODS is reading over 4000 and fluctuates. Should it also be 0 because I am in park? Should it read some value that correlates to the OSS, or the input shaft? I cannot find anything anywhere that says what are good values. Could have done something wrong internally during the rebuild. Or it is a bad wire or connection. Can someone tell me what that thing should be reading? I have read that its input is vital to the PCM doing proper shifting and pressure control.
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Cross-Country
Joined: Oct 2010
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From: Knoxville TN
It was not showing any codes. That is what frustrating trying to diagnose. I have been told it is probably some type of hard part failure like the sprag clutch.
I am dropping it back out to open it up and check things. If I don't find something obvious (I have a guy helping who is very good at rebuilding transmissions, just not this particular one) will have to decide whether to just buy a reman one and put it in.
I am dropping it back out to open it up and check things. If I don't find something obvious (I have a guy helping who is very good at rebuilding transmissions, just not this particular one) will have to decide whether to just buy a reman one and put it in.
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From: SW Va
Ok no trouble codes, thats good feedback, so lets think about this some more. Seeing as how no codes are stored & Lots of things are monitored by the tranny controller, it suggests the root cause is something the tranny controller isn't monitoring. Is fluid level correct, the trnny filter in place & line pressure & fluid flow up to spec & remaining so???
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Cross-Country
Joined: Oct 2010
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From: Knoxville TN
Fluid levels correct. Check level before and after starting and see a difference, so pump is working. Don't have a gauge to check line pressure. Have been told this thing does not have a ODS (overdrive drum speed) sensor, but the ATSG manual shows one. Was told it has an intermediate speed sensor but cannot find a PID for it. Their is an input shaft speed sensor which I belive is same as turbine shaft speed sensor. Have also seen that if you unplug this thing it should have reverse and 1 forward gear. But it will not move.
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Joined: Jan 2004
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From: SW Va
Ok, more good feedback, so lets back up a little more & ask if these are the problems the tranny had when you bought & rebuilt it, or are these new problems that occurred after the rebuild?
Are you using a ELM scan tool & running FORScan diagnostic software, or a freestanding full-up scan tool??? Is the scan tool able to access All of the vehicle computer / controllers & put up All of the things available on this year model tranny???? FORScan can monitor all available vehicle computer / controllers.
Are you using a ELM scan tool & running FORScan diagnostic software, or a freestanding full-up scan tool??? Is the scan tool able to access All of the vehicle computer / controllers & put up All of the things available on this year model tranny???? FORScan can monitor all available vehicle computer / controllers.
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Cross-Country
Joined: Oct 2010
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From: Knoxville TN
I am using OBDLink software. It came with the OBDLink MX+ bluetooth connector. It also has the extended Ford PIDS.
When I bought it only had manual 2 and 1, but would drive in D once you got it going.
I took it out. New valve body. New servos. New steels and frictions. All other parts looked good and seemed to be working correctly. Only problems found were a couple burned clutches and front bushing of input shaft was out.
But after going back in still no reverse and drive. However, 2 and 1 engaged much stronger. I think that was due to shift kit in valve body. After a few tries it would throw the ODS no signal code.
I redid the ground connector on battery and it would no longer throw that code.
Was going to drive it to shop to have alternator checked. But on way it revved up high like it went into neutral and no gears would work. 2 and 1 had quit also.
That suggests something inside died. Have been told the sprag clutch failure would cause no reverse and drive. And eventually would lose other gears also.
Also read that if you unplug it from PCM you should have reverse and 1 forward gear. But I have none. So that also indicates some type of hardware failure inside.
When I bought it only had manual 2 and 1, but would drive in D once you got it going.
I took it out. New valve body. New servos. New steels and frictions. All other parts looked good and seemed to be working correctly. Only problems found were a couple burned clutches and front bushing of input shaft was out.
But after going back in still no reverse and drive. However, 2 and 1 engaged much stronger. I think that was due to shift kit in valve body. After a few tries it would throw the ODS no signal code.
I redid the ground connector on battery and it would no longer throw that code.
Was going to drive it to shop to have alternator checked. But on way it revved up high like it went into neutral and no gears would work. 2 and 1 had quit also.
That suggests something inside died. Have been told the sprag clutch failure would cause no reverse and drive. And eventually would lose other gears also.
Also read that if you unplug it from PCM you should have reverse and 1 forward gear. But I have none. So that also indicates some type of hardware failure inside.
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Joined: Jan 2004
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From: SW Va
Ok, I took a look at the OBDLink MX+ abilities & looks like it should be able to access everything you need to, as it can access the GEM & Tranny controllers, but it troubles me that the tranny is no longer working & no trouble codes are set. That doesn't make sense to me. I'd have a look at line pressure & fluid flow volume over time & that should be something like 1/2pt -15 seconds engine run time.
Did you test the replacement valve body solenoids & other solenoids & sensors for continuity, especially the electronic pressure control solenoid, even if it too was replaced. Just because a part is new doesn't automatically make it good, make em prove themselves.
Did you test the replacement valve body solenoids & other solenoids & sensors for continuity, especially the electronic pressure control solenoid, even if it too was replaced. Just because a part is new doesn't automatically make it good, make em prove themselves.
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Cross-Country
Joined: Oct 2010
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From: Knoxville TN
No, I did not test the solenoids in the new body. They were supposed to be new. But when I drop it that is something I will be testing. I saw they should be 20-50 ohms across connectors.
Yeah the no codes stumps me. Some say that all the sensors are working, just something broken inside. But I would think that since there is nothing reading on OSS and it is trying to move, that should indicate a problem to the PCM. Have someone dropping it this weekend. So I will be able to look inside. Cannot do many tests on it now. Don't have the necessary stuff and crawling around under it is a problem for me. My hope is that when taking it apart we find something that is obvious. Will definitely look at the sprag clutches closely. That has been indicated as the problem by some people.
Thank you for taking the time to respond and help. Unfortunately around here there are so many shops/people that will just rip you off. I have help from a very honest reliable guy. He does lots of dodge trannys. Builds them to hold anything with a 2 year warranty. But he does not have any experience with this thing. I know automatics are similar in a way because they do the same thing, but also they are different in how the parts accomplish it.
Yeah the no codes stumps me. Some say that all the sensors are working, just something broken inside. But I would think that since there is nothing reading on OSS and it is trying to move, that should indicate a problem to the PCM. Have someone dropping it this weekend. So I will be able to look inside. Cannot do many tests on it now. Don't have the necessary stuff and crawling around under it is a problem for me. My hope is that when taking it apart we find something that is obvious. Will definitely look at the sprag clutches closely. That has been indicated as the problem by some people.
Thank you for taking the time to respond and help. Unfortunately around here there are so many shops/people that will just rip you off. I have help from a very honest reliable guy. He does lots of dodge trannys. Builds them to hold anything with a 2 year warranty. But he does not have any experience with this thing. I know automatics are similar in a way because they do the same thing, but also they are different in how the parts accomplish it.
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Joined: Jan 2004
Posts: 13,851
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From: SW Va
You may have more than one problem, so try to come by a pressure gauge & get a reading on pressure & volume over time, before dropping the tranny again. Will be interesting to hear what you find..
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