Hey Scotty! My 2009 Camry is Making a Weird Hissing Noise in Reverse
I have the 2009 Toyota Camry with the V6 engine, and I recently noticed that it made a hissing noise when it's only in reverse. I'm not sure how long it's been happening, but it's definitely noticeable.
Here's a video of it: https://photos.app.goo.gl/mUUStuZ6HjwTtJWt7
Here's another video showing me shifting gears to prove that it only happens in reverse: https://photos.app.goo.gl/uhQfHfLVC9VJWv1u5
It's kind of hard to hear, so you might have to turn the volume up.
Recently, I have drained and filled the transmission with fresh fluid after replacing the filter with a Beck/Arnley one. I lost about 3.5qts, so I put in 3.5qts and did the sealed transmission temperature check to make sure everything was set.
What I noticed after a week is that the old drain plug was ever so slightly leaking so the transmission pan was damp, so I replaced it with a new OEM one, leak solved. I also put in a bit of fluid in to compensate for any fluid I lost. This is when I began noticing the hissing sound.
I did the transmission temperature check again, and I noticed that the transmission was slightly underfilled (no fluid trickling out), so I filled it up till it was at the right level again (fluid trickling out between 103F-114F). The hissing is still there, and I'm at a loss.
Again, this ONLY happens when in reverse and nothing else. Also, the car has to be warmed up for the noise to occur, which is probably why I never noticed it in the garage as I don't wait for the car to warm up before reversing out for work. I used a car stethoscope and I confirmed that this hissing noise is coming from the transmission.
Sorry for the essay. Can you help me figure out what's wrong?