Hello all. I'm fixing to do a TCC swap on my wife's 05 honda crv. It was having some issues with driveability and reverse, plus it has the loud whirling sound from the torque converter. I've swapped the external solenoids A & B-C, with no such luck,. I would imagine it has to be the torque converter being it changes gears ok. Just that when you put it in drive or reverse it takes a bit to engage. Plus when you go from drive to reverse there a distinct metallic bang from the tranny. I would suspect this is the TCC doing this. I'm pretty good on my manual 93 honda accord, I can pretty much totally take it. Apart and put it back together with ease. But if I replace the torque converter,. What else needs to go along with it. Seals? Gaskets?.... .

 

Hello I read your post and I'm just thinking about how you described going from drive to reverse it etc. I'm not sure if you understand how these Transmissions work, but they are essentially automatic shifting manual transmissions. Instead of synchros to engage the gear sets, there are clutch packs fed oil pressure via oilpipes travelling through hollow gear set shafts. But there is such a thing as a reverse selector inside that transmission . It's basically A gear that gets put into place just like a manual transmission and it meshes with 4th gear.. If the transmission has been repeatedly shifted from reverse to drive while it's still going backwards or drive to reverse while it's still going forward it's possible to do damage to the gear on the reverse selector. However the reverse selector circuit does have some fail-safes to prevent it from damaging itself And also if you tried to put your gear shift in reverse while you're driving forward you would find that it would not actually be able to do as there is a reverse lockout solenoid in the gear shift lever as well . So the reverse selector gives you get reverse. There's a whole circuit involved in the application of this Hydraulically. I would feel pretty confident that it's not the torque converter alone making giving you issues. The torque converter always spins in the same direction and has nothing to do with reverse selection. As for the whirring noise I have repaired my Transmissions whirring noise by replacing the bearing on the gear behind the side cover. But your transmission sounds like it has other problems . Did you drain the oil and see how much metal is on the magnet. If you need some help diagnosing this I can send you all the diagnostics from the service manual.
while its true your TC may be damaged or failing, i can't know , it sounds like you are having other issues.

 

Many Honda auto transmission issues can be corrected by replacing fluid 1 to 3 times in successive services. It takes about 3.5 liters per change as the torque converter does not drain the bottom hall of it’s body. The whirring noise is a know issue and indicates bearing/ gear wear and misalignment causing the whine. The second video gets into it in detail.
This video I found on YouTube fix my CRV transmission worrying noise. Yours could be different. I pinpointed mine to be sure using a stethoscope and having a car run up on the hoist but you could do the same thing on the ground. Basically involved lowering the transmission and the engine along with its mounts, the whole cradle basically which is four bolts and then undo the mounts at the top and lower the whole thing down about 10 inches so that you can pull the Side cover off the transmission and replace it with the new side cover and bearing. On the video the guy shows he starts the engine and then after about one second or two seconds then you can hear the worrying noise start up which is the noise coming from that bearing. In a second half of his little video he starts it and although you hear the alternator whine like you do in the first video you don’t hear that secondary whining noise that starts up after a couple of seconds. But like I said your problem might be different and more damage may be there. I’ll post a video from that link and also post a video for you of rebuilding one one of these transmission

second vid is same issue but on an out of car rebuild explained well from cause to repair

 

Here is Reverse power flow . The Reverse Selector slides a collar over revers idler gear hub so wear in this area will make a noise engagement

Also here is an excellent explanation of a 5 speed Honda. it’s not a CRV one but it’s pretty much the same concept although this one is slightly different This is a newer 5 speed AT5 fed unit as it says in the vids description from 2003 odyssey. These were problematic. My 2003 accord trans was replaced under warranty after it locked up going into 3rd gear. Lucky tho that after 2006 Honda built a better ( mostly) 5 speed that went into the 05/06 CRV. .

 

heres the hydraulic circuits for reverse

 

heres the hydraulic circuits for reverse

 

Yeah I've replaced the fluid at least 6 times since this started happening. I understand about the whining noise from the side cover. I've looked into that and I can see where that might be an issue. But from what I'm seeing and hearing, the noise isn't from the side cover, it's coming from right where the torque converter is located. Which make me wonder if the TC is the problem. It started around 2 or 3 weeks ago as well as odd shifts between 1st and 2nd. I know it's hard to explain symptoms from words, but from what I've seen and read and watched, it's has something to do with the TC. Maybe a pump gone bad, etc. I've called about 10 or so repair shops and they all give the same answers, telling me the tranny is dead. Even before I try to describe the symptoms. I'm just trying to save a $$$$$$$$$$$..



Quick question about a cover on my crv. #8 the transmission shift solenoids cover in the diagram on the bottom left. It has 4 solenoids and a temp sensor located inside. They are all connected with a harness that sticks through the back behind the solenoids. Is it supposed to be full of ATF? When I pulled it off, thinking it was just a cover with air behind it- Nope! I was wrong!! About 3 or 4 cups of fluid came out from behind it. I would imagine that being full might cause an issue with the electronics

 

The electrical stuff is not affected by trans oil.
I would find a used transmission for this one. The noise is an indication of excessive wear. Shaft bearing(s) causing clearance issues causing foriegn material in the valve body. What was on the magnet?

 

Makes sense,. If it was a manual like my 93 accord, I'd have no problem ripping it apart,. But the automatic thing is new to me. Used or rebuilt is where I most likely will be heading to

 

There was no debris on the magnet, just the usual black sludge stuck to it. All the transmission drains I've did in the last couple of weeks, I sifted through the pan with a high power magnet to look for any metal and I came up with none. Which is good news to me

 

I seen the pics you posted, which I did download the shop repair manual. When it first happened to the wife's crv, I got 2 codes.... P1734, P0780. I went to the pull apart near me and got 2 of each valves. The single A linear valve, and dual linear valve B & C. I did the resistance test and the 12 volt test to all of then as well as the original one's. With no change to the trans as obvious after install. On the pic 14-18 that pretty much describes what the wife told me and from what I've observed. I did swap out the solenoid E on the tranny, which is why I had the question about the cover full of fluid. I did the swap on the valves A on the top. This is where I'm at a stand still

 

Under that cover , oil is normal. Those are the actual shift solenoids ( on or off) , while the outside solenoids are for clutch pressure control ( pulse width modulated)
P0780 is shift control issue leading to , general.

P1734 is shift solenoids B or C stuck in off position OR shift valves B or C stuck (debris in valve possibly)
If you verified the solenoids B and C are operational, a shift valve(S) may be stuck. A problem with shift valve B and or E will cause reverse engagement issues. Both of these valves are in play for reverse engagement.
Go back and review the hydraulics schematic of reverse. The only other thing you can do is use a pressure gauge and check line pressure ports as in the manual but that's fairly limited.
I would be sceptical of being able to repair this transmission without pulling it for overhaul. It sounds like you have done all you can externally. If you can get a used one do that and dismantle this one a see what you can find out.

 

Well iv been looking around for some used and they are hard to come by. A buddy of mine bought a JDM for his accord,. Would that be compatible with the UK built crvs?

 

I haven't any expertise in that swap, but if the trans model number is the same it should work.
I found on one JDM site (New York) that they're selling Transmissions from Japanese models with K24 engines in front wheel drive and they say they fit so I would assume there's no reason why do all wheel drive transmission wouldn't work either. They would be able to confirm this for you

https://jdmnewyork.com/product/2005-...sion-jdm-k24a/

 

How did you end up resolving this issue? I have a 2006 CRV UK version and I'm having the same noise from the torque converter inspection cover at startup then then the noise goes away once the fluid warms up. I've replaced fluid three times and filter twice and put on a used solenoid B/C pack(the trans now shifts perfectly but still makes noise at startup).