Yea, that stain/puddle on the ground looks oily and not just water wet. Plus it looks like trans fluid getting ready to drop off that u-joint cup on the driveline.
Wet Concrete From Transmission Extension Housing
- Thread starter YukonCrazy
- Start date
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I can’t for the life of me tell from those pictures what the fluid is. If I zoom in at the bottom of the driveway pic it looks like water but the reflection above looks slightly pink. And there’s a drop coming off the u joint but nothing coming out of the tail shaft or seal so it might be dripping from above. What color is the fluid on the driveway Scott? Does it look like trans fluid or not?
swathdiver
Full Access Member
Looks like it's time for a new one. Funny thing, that looks like the seal on the back of my transfer case. If I'm reading the books right, yours should look completely different. I'm coming up with 8677268 for yours and installed with J-21426 but could be wrong.
swathdiver
Full Access Member
I see spray marks above but not on the exhaust, probably burned off. Fluid does look too dark for trans unless his is dirty of just the magic of cameras in dark places.
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YukonCrazy
Full Access Member
Sorry for the lack of details on the color. It's definitely trans fluid based on color.
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YukonCrazy
Full Access Member
Is that the part number for the transmission extension housing or the seal? The trans extension housing I purchased came with the seal already so maybe I have the wrong trans extension housing?
Anyway to determine the trans extension housing is correct other than with the dealer?
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YukonCrazy
Full Access Member
This is the one from RockAuto that I have based on 2008 GMC Yukon SLT 2WD 5.3Flex.
https://www.rockauto.com/en/moreinfo.php?pk=1217243&cc=1441039&jsn=2321
https://www.rockauto.com/en/moreinfo.php?pk=1217243&cc=1441039&jsn=2321
915_Tahoe?
Bummer. Rear seal then. That’s a lot of leakage.
I believe you should be looking at the output shaft seal, the rear seal on the trans itself. That much fluid means to me that your rear seal is leaking pretty good and filling the extension housing up and then leaking out the back of it. It should only get a small amount of fluid in it. Every time I have pulled my trans and separated the extension housing there has only been a small amount of fluid in the extension housing.
