My 2004 Honda Odyssey transmission has a leak in the case (the Torque Converter gasket). I know Honda transmissions are notorious for being highly particular when it comes to fluid, so I wanted to ask if I can safely use AT-205 to swell the gasket?
My question isn't asking about people's experience with the efficacy of AT-205. It was about its functionality/compatibility with Honda transmissions.
Well, a quick search of Scotty's channel doesn't turn up any examples of him using it in Honda automatic transmissions but he may choose to respond himself if he has done so. An internet search does show people having success with it in Honda transmissions, but as far as negative effects I would expect it to be a bit of a crap shoot depending on the condition of the fluid and transmission.
Although there have been success stories of reducing leaks with AT-205 the ones I've seen all involve seals around rotating shafts rather than gaskets on stationary parts. If you try it and it works let us know. The only way to really fix the problem for certain and long-term though is to replace the bad gasket.
Thanks.
Where'd you find results via an online search? I looked at the Honda Ody Club, but I only found discussion topics about it being used for Rear Main Seals.
It's hard to justify the $$$$ from a Cost-Benefit Analysis of dropping the transmission and pulling apart the case to replace the gasket when the value of the van is worth ~$2500 with 330K miles on it. The transmission runs great; I just hate the stain on my concrete driveway.
Try search engines with search terms like "ATP AT-205 Honda Transmission". For example this came up with a guy using it in a Honda Pilot transmission and it seemed to help. (A responder thought it was a rear main seal which wouldn't make sense if putting the stuff in the transmission helped.)
https://www.piloteers.org/threads/at-205-users-in-transmission.177382/
With that kind of age and mileage I think it's a real roll of the dice as to whether it will cause problems. You're probably not going to find a definitive answer, there are too many variables.
My question isn't asking about people's experience with the efficacy of AT-205. It was about its functionality/compatibility with Honda transmissions.
Honda transmissions are known to be finicky about fluid. Putting AT-205 in a Honda transmission hoping it might stop a leaking gasket (and it won't) literally makes no sense. AT-205 will not stop that type of leak (it needs to be a rubber seal leak), however it could damage your transmission, so don't do it..
I wanted to ask if I can safely use AT-205 to swell the gasket?
If it works at all AT-205 does not work on gaskets.
"AT-205 Re-Seal is a fast, effective and safe stop-leak for all rubber seals and gaskets"
You believe advertising? It is very unlikely to work. If you really want the stop the leak replace the bad 20-year-old gasket.
My question isn't asking about people's experience with the efficacy of AT-205. It was about its functionality/compatibility with Honda transmissions.
My 2004 Honda Odyssey transmission has a leak in the case (the Torque Converter gasket). I know Honda transmissions are notorious for being highly particular when it comes to fluid, so I wanted to ask if I can safely use AT-205 to swell the gasket?
I put AT-205 reseal in my '79 Pontiac and it wasn't effective. It slowed the leak, yes, but it still leaked. If you plan on keeping the vehicle long-term, just replace the gasket. AT-205 is just a band-aid, regardless of its advertising.
Also, if a gasket is torn, it will not do anything except possibly make the leak worse.
I'm not aware of any "torque converter gaskets". The torque converter is welded shut.
If you mean the input shaft seal, then I'm pretty sure those are teflon rings and if they're worn out then additives won't do squat, and may actually shorten the life of the transmission.
I'm not aware of any "torque converter gaskets". The torque converter is welded shut.
If you mean the input shaft seal, then I'm pretty sure those are teflon rings and if they're worn out then additives won't do squat.
I wondered about that. Maybe the torque converter case seal?
https://www.hondacarpartsdirect.com/oem-parts/honda-gasket-torque-converter-case-21811plx000
If a leak is coming from there the source is probably something like the front pump seal dripping down past a possibly bad gasket.
You could be right. Those FWD transmissions are significantly more complicated. But I still wouldn't put any goop in the fluid if it still shifts fine. That could finish off a 20yo auto trans right quick.