Transmission leak

Tiny
TUNDRAATX08
  • MEMBER
  • 2008 TOYOTA TUNDRA
  • 5.7L
  • V8
  • 2WD
  • AUTOMATIC
  • 225,000 MILES
Rear extension seal is a little damp where drive shaft goes into transmission. Toyota said leak just started.

What should I have a mechanic look at to properly fix?
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Wednesday, July 31st, 2019 AT 10:32 AM

7 Replies

Tiny
KASEKENNY1
  • EXPERT
Hi,

Some seepage from seals and gaskets is okay. If they are wet or dripping then this is a leak that needs to be fixed. If you can get a picture of the area, one close up to the damp area and then one a little further back so I can see what would need to be replaced, I can let you know what needs to happen. Thanks
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Wednesday, July 31st, 2019 AT 1:59 PM
Tiny
TUNDRAATX08
  • MEMBER
Is this the right area? Couldn't get rid of the transmission picture.
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Thursday, August 1st, 2019 AT 6:30 AM
Tiny
KASEKENNY1
  • EXPERT
Okay. No problem. I circled what appears to be the leak you are talking about. See attached. Is this correct?

If it is, I would not worry about that as of right now. Clearly I would keep an eye on it and when (if) it gets worse I would fix it.

If that is not it, then maybe a different angle will show it better.
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Thursday, August 1st, 2019 AT 7:26 PM
Tiny
TUNDRAATX08
  • MEMBER
Yes. I think so. Toyota didn't show me. I caught the line item on their report about a rear extension seal that was damp but we had no discussed it so I called them. They said the same to keep an eye out of it.

What symptoms should I anticipate with the vehicle driving with an actual rear seal leak? Will the transmission slip and cause jerkiness or control issues?

Thanks again!
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Friday, August 2nd, 2019 AT 4:00 AM
Tiny
KASEKENNY1
  • EXPERT
Ok. In that case, this is nothing to worry about. What you need to do is to physically keep an eye on it. Meaning a couple times per month just look under there and see if it looks any different. Is it getting "wetter" or are you starting to see drips on the driveway? Once it starts to drip is when you want to take care of it.

You will not do any damage to any component if you follow this advice. The only time you will damage something or even notice an issue is if you ignore this long enough for most of the fluid to leak out. With something that is dripping that will take quite a long time. However, if you see it getting worse and then make arrangements to get it fixed, you will be just fine.

Let me know if you have more questions. Thanks
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Friday, August 2nd, 2019 AT 6:15 PM
Tiny
TUNDRAATX08
  • MEMBER
Thanks, looks about the same. I checked the right side as well.
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Wednesday, September 4th, 2019 AT 5:14 PM
Tiny
KASEKENNY1
  • EXPERT
Sure does. I wouldn't worry about this being a leak. It appears to just be normal seepage. Seepage does not get any better and very well could turn into a leak but I would not do anything to repair this at this point. When you can wipe your finger on that extension and wipe off a drip of oil is when I would take action. The rule of thumb I use, is drips or large areas of oil staining are leaks. Small areas of dampness that does not change are normal seepage.

Hopefully this helps. Thanks
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Wednesday, September 4th, 2019 AT 7:04 PM

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