Hi Odylovers!
I'm not sure if its allowed to open a new thread just so i can mark my progress with my repairs. of course, I;m also doing this so others may benefit from what i've learned and gone thru (even if its just one of the many).
My 04 Ody got the dreaded P0740 CEL last month and I've been researching for a cure since then. I found this wonderful forum and have been kinda hooked to it since. Lot of real good info here.
background: we bought our Ody thru Craigslist a year ago (2009). it seemed like a good deal. it was clean, almost everything worked. its a EX, for a real good price. i checked online for any TSB or issues and verified that the work has already been done.
mainly this was the oil jet to 2nd gear (i think). We had all the fluids replaced and engine tuned up. there were a few minor issues but nothing that hampered it from running. issues like - idle up and down, dead clock light, bald tires, transmission whine during acceleration, ok sound system, battery dying all the time (we found out that we left the interior lights on at night -duh). but overall, we really loved the way it drives, the fold down back seat. plus its the most comfiest vehicle we have.
Starting off: December 2010, My wife reports to me that the CEL and TCS light came on and that while she was getting on the fwy, the engine revved up high before it engaged 3rd gear. it actually did it a few time on the way home. When she arrived, i used my scanguage to check, P0740. I never heard of that before so i started googling and was brought here to OdyClub.com.
I read and... Drats! its worse than i thought. she went to get it checked and the verdict was, change of electronics, reprogramming to the tune of $1.5K! Since i was in the middle of fixing my new old truck. its just something that would have to wait for later. so we parked the Ody for a while.
But I was not satisfied with that verdict. I just kept researching, spending near sleepless nights reading all I can about this issue.
a lot of reading later, I stumbled on one thread here that mentioned about someone cleaning their solenoids. Jofei I believe. (check the forum subject Honda Transmission Problem Root Cause and a Fix??)
I did more research since his we didnt have the same tranny, I then went ahead and bought the parts. i got the 3 pipes, the o rings, the long pipe, the paper gasket, and the rubber gasket for solenoid C.
Time came to do the work and i found out that the pipes was mostly clean cept for very little debris in the middle pipe. (took me 3 hours to figure out how to open it) I didnt even have to change the gasket since it was intact. I did find that the ATF was dark and dirty red. (its only been a year and 10k mi) I didnt get to open the other solenoid tho since i ran out of time.
at this time, I read somewhere that a flush would help. since i thought the system was clean enough, i had a mechanic do a flush with Honda ATFZ1. he did it with a machine even tho i said not to. (dont do it!) but i wasnt there so it happened.
The Flush actually helped! it doesnt rev high anymore and the more we use it the, the less slipping it does, i still have the P0740 even if i reset the ECU. (it seems that the old burned, varnish on the clutch goes away little by little with the new ATF with use.)
I still dont use it much and i kept reading, saw this thread (Easy Transmission FIX - Pressure Switches) I read thru it and also read the thread it indicated in Acurazine forums. I think that the guys in that other forum seemed to have stumbled on something conclusive. ATFZ1 is not a good ATF for our Ody nor their Acura. hahaha. that was funny.
I think IHC has a point about the pressure switches wearing out over time. its a moving part. so i now plan to track my Miles and change it every 50k mi. or so.
They also have a point about not using ATFZ1. They theorize that it has too much Friction Modifiers (FM) and made it too slippery. Theory goes like ( ATF too slippery, clutch slips, creates heat, burns the ATF, make clutch slip more, vicious cycle) They experimented with RedLine Racing ATF since it suppose to not have any FM. so far, most people reports success with their tranny after changing to redline and the pressure switches. (up to 12K+ now) so i planned to do the switch also.
During the Searches, i also came across a very helpful PDF named (Clutch_Pressure_Solenoid_Valve.pdf) i dont remember (someone help me) where i got it but it detailed how to clean the solenoids A B & C. Another one is Mel's (ATF-CoolerInstallationNotes.pdf) since i plan to add a cooler.
So I went ahead and bought the 2 pressure switches and a couple of solenoids just in case. I also got the TruCool LPD 4543 cooler (e bay)( should been a 4544) and a couple of the mysterious OEM ATF Filter (Rock Auto). got the Redline Lightweight and the Racing ATF (RPW) I plan to mix to custom viscosity so i got them both.
Today (1/22/11) I finished cleaning Solenoid A, B (again) and C, changed the ATF filter and the Pressure Switches.
A&B was clean, I didnt clean it then but now its pretty clean. the flush did some good.
Solenoid C gasket/screen was clogged real bad with debris. I just changed the whole screen gasket.
I changed the ATF Filter too. It was dripping dark Red ATF even tho the new ATF isnt even 100mi old yet. the ATF itself is pretty clean and red.
I changed the switches, it didnt look bad to me but since i didnt know how old it is, i just went ahead with it.
Since i was down there with the switches, i also noticed that the tranny/engine mount was cracked. gotta change that some time too...
I wasnt able to do a test drive yet coz i had the bumper off to add the cooler and magnefine. I started it up to check for leaks. had it up to operating temp for 10mins. and shifted it between R and D a few times and the nice part so far was it didnt Clunk into gear anymore. I havent changed the ATF yet. I will add the cooler first. then do a test drive tommorow.
I did notice another issue that while i had it partly uncovered. when i first started the idle was going up and down. while it did that. I hear a tick from a couple of the ignition coil area. also there was some sucking/vacuum noise from the manifold area that would pause in time with the tick.
I wasnt able to investigate but will follow up later.
I'm not sure if its allowed to open a new thread just so i can mark my progress with my repairs. of course, I;m also doing this so others may benefit from what i've learned and gone thru (even if its just one of the many).
My 04 Ody got the dreaded P0740 CEL last month and I've been researching for a cure since then. I found this wonderful forum and have been kinda hooked to it since. Lot of real good info here.
background: we bought our Ody thru Craigslist a year ago (2009). it seemed like a good deal. it was clean, almost everything worked. its a EX, for a real good price. i checked online for any TSB or issues and verified that the work has already been done.
mainly this was the oil jet to 2nd gear (i think). We had all the fluids replaced and engine tuned up. there were a few minor issues but nothing that hampered it from running. issues like - idle up and down, dead clock light, bald tires, transmission whine during acceleration, ok sound system, battery dying all the time (we found out that we left the interior lights on at night -duh). but overall, we really loved the way it drives, the fold down back seat. plus its the most comfiest vehicle we have.
Starting off: December 2010, My wife reports to me that the CEL and TCS light came on and that while she was getting on the fwy, the engine revved up high before it engaged 3rd gear. it actually did it a few time on the way home. When she arrived, i used my scanguage to check, P0740. I never heard of that before so i started googling and was brought here to OdyClub.com.
I read and... Drats! its worse than i thought. she went to get it checked and the verdict was, change of electronics, reprogramming to the tune of $1.5K! Since i was in the middle of fixing my new old truck. its just something that would have to wait for later. so we parked the Ody for a while.
But I was not satisfied with that verdict. I just kept researching, spending near sleepless nights reading all I can about this issue.
a lot of reading later, I stumbled on one thread here that mentioned about someone cleaning their solenoids. Jofei I believe. (check the forum subject Honda Transmission Problem Root Cause and a Fix??)
I did more research since his we didnt have the same tranny, I then went ahead and bought the parts. i got the 3 pipes, the o rings, the long pipe, the paper gasket, and the rubber gasket for solenoid C.
Time came to do the work and i found out that the pipes was mostly clean cept for very little debris in the middle pipe. (took me 3 hours to figure out how to open it) I didnt even have to change the gasket since it was intact. I did find that the ATF was dark and dirty red. (its only been a year and 10k mi) I didnt get to open the other solenoid tho since i ran out of time.
at this time, I read somewhere that a flush would help. since i thought the system was clean enough, i had a mechanic do a flush with Honda ATFZ1. he did it with a machine even tho i said not to. (dont do it!) but i wasnt there so it happened.
The Flush actually helped! it doesnt rev high anymore and the more we use it the, the less slipping it does, i still have the P0740 even if i reset the ECU. (it seems that the old burned, varnish on the clutch goes away little by little with the new ATF with use.)
I still dont use it much and i kept reading, saw this thread (Easy Transmission FIX - Pressure Switches) I read thru it and also read the thread it indicated in Acurazine forums. I think that the guys in that other forum seemed to have stumbled on something conclusive. ATFZ1 is not a good ATF for our Ody nor their Acura. hahaha. that was funny.
I think IHC has a point about the pressure switches wearing out over time. its a moving part. so i now plan to track my Miles and change it every 50k mi. or so.
They also have a point about not using ATFZ1. They theorize that it has too much Friction Modifiers (FM) and made it too slippery. Theory goes like ( ATF too slippery, clutch slips, creates heat, burns the ATF, make clutch slip more, vicious cycle) They experimented with RedLine Racing ATF since it suppose to not have any FM. so far, most people reports success with their tranny after changing to redline and the pressure switches. (up to 12K+ now) so i planned to do the switch also.
During the Searches, i also came across a very helpful PDF named (Clutch_Pressure_Solenoid_Valve.pdf) i dont remember (someone help me) where i got it but it detailed how to clean the solenoids A B & C. Another one is Mel's (ATF-CoolerInstallationNotes.pdf) since i plan to add a cooler.
So I went ahead and bought the 2 pressure switches and a couple of solenoids just in case. I also got the TruCool LPD 4543 cooler (e bay)( should been a 4544) and a couple of the mysterious OEM ATF Filter (Rock Auto). got the Redline Lightweight and the Racing ATF (RPW) I plan to mix to custom viscosity so i got them both.
Today (1/22/11) I finished cleaning Solenoid A, B (again) and C, changed the ATF filter and the Pressure Switches.
A&B was clean, I didnt clean it then but now its pretty clean. the flush did some good.
Solenoid C gasket/screen was clogged real bad with debris. I just changed the whole screen gasket.
I changed the ATF Filter too. It was dripping dark Red ATF even tho the new ATF isnt even 100mi old yet. the ATF itself is pretty clean and red.
I changed the switches, it didnt look bad to me but since i didnt know how old it is, i just went ahead with it.
Since i was down there with the switches, i also noticed that the tranny/engine mount was cracked
. gotta change that some time too...I wasnt able to do a test drive yet coz i had the bumper off to add the cooler and magnefine. I started it up to check for leaks. had it up to operating temp for 10mins. and shifted it between R and D a few times and the nice part so far was it didnt Clunk into gear anymore. I havent changed the ATF yet. I will add the cooler first. then do a test drive tommorow.
I did notice another issue that while i had it partly uncovered. when i first started the idle was going up and down. while it did that. I hear a tick from a couple of the ignition coil area. also there was some sucking/vacuum noise from the manifold area that would pause in time with the tick.
I wasnt able to investigate but will follow up later.
