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dobryan
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Joined: March 24, 2006
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Location: Brookeville, MD
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 Posted: Sat Dec 19, 2020 2:37 pm Post subject: Transmission axle flange seal leak? |
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The past two days I've gotten a substantial leak of Swepco 202 from the area where the CV joins to the transmission. It looks like it is coming from behind the flange the CV bolts to. The CV is basically dry. My guess is axle seal, but it sure came on fast.
Opinions?
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Dave O
'87 Westy w/ 2002 Subaru EJ25 and Peloquin TBD
"To travel hopefully is a better thing than to arrive." Robert Louis Stevenson
MD>Canada>AK>WA>OR>CA>AZ>UT>WY>SD
https://www.thesamba.com/vw/forum/viewtopic.php?t=620646
Building a bus for travel in Europe (euroBus)
https://www.thesamba.com/vw/forum/viewtopic.php?t=695371
The Western Syncro build
https://www.thesamba.com/vw/forum/viewtopic.php?t=746794
Last edited by dobryan on Mon Jan 04, 2021 9:22 pm; edited 1 time in total |
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MarkWard
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Joined: February 09, 2005
Posts: 17153
Location: Retired South Florida
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| Posted: Sat Dec 19, 2020 2:42 pm Post subject: Re: Transmission axle seal leak? |
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The last one I had leaking like that, the new O ring that seals the bearing housing had snapped. I'd plan on doing the seal, but maybe have the O ring on hand assuming you have a way to spin the seal cover out.
Also, I'll check to see the thread with the seal save for the CV flange, might as well have one of those on hand too.
https://www.thesamba.com/vw/forum/viewtopic.php?t=564114
edit: You will need the flange cap that goes on top of the circlip that holds the flange to the shaft.
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dobryan
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Location: Brookeville, MD
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djkeev
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DanHoug
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Location: Bemidji, MN
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| Posted: Sat Dec 19, 2020 6:28 pm Post subject: Re: Transmission axle seal leak? |
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cold weather brought it on... if you only want to do it once, add a SpeediSleeve to the flange.
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60% of what you find on the internet is wrong, including this post.
'87 Westy & '89 Westy both 2.1 4spd
Past projects can be found at--
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Wildthings
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Joined: March 13, 2005
Posts: 50350
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| Posted: Sun Dec 20, 2020 12:22 am Post subject: Re: Transmission axle seal leak? |
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| Wonder if the vent hole clogged up causing a pressure buildup that pushed the seal out? |
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Abscate
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Location: NYC/Upstate/ROW
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| Posted: Sun Dec 20, 2020 3:52 am Post subject: Re: Transmission axle seal leak? |
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| djkeev wrote: |
I’m sorry!
I did it last week when I was there.
It seemed like you needed a project.
Dave |
When you asked Dave what he wanted for dinner and he said “Burgersand O rings” , he misunderstood.
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dobryan
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djkeev
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Wildthings
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Joined: March 13, 2005
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| Posted: Sun Dec 20, 2020 8:49 am Post subject: Re: Transmission axle seal leak? |
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| dobryan wrote: |
| Wildthings wrote: |
| Wonder if the vent hole clogged up causing a pressure buildup that pushed the seal out? |
Possible. I’ll check. But this happened after a short drive both days. Not enough to get the trans temp up at all.
And we drove 2600 miles to Key West and back a month ago with no leaks. |
I have had seals that suddenly ripped apart due to excessive wear. Hard to fathom that they weren't even seeping before hand. |
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dobryan
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Location: Brookeville, MD
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| Posted: Sun Dec 20, 2020 9:10 am Post subject: Re: Transmission axle seal leak? |
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| Wildthings wrote: |
| dobryan wrote: |
| Wildthings wrote: |
| Wonder if the vent hole clogged up causing a pressure buildup that pushed the seal out? |
Possible. I’ll check. But this happened after a short drive both days. Not enough to get the trans temp up at all.
And we drove 2600 miles to Key West and back a month ago with no leaks. |
I have had seals that suddenly ripped apart due to excessive wear. Hard to fathom that they weren't even seeping before hand. |
I agree. The other side has a small amount of dirt adhered to it from a seep so minor I'd consider it normal. This side just let loose without warning.
I drove back from San Diego to MD in October and Key West in Nov and nothing. I guess I am glad it happened when I got home! 
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Dave O
'87 Westy w/ 2002 Subaru EJ25 and Peloquin TBD
"To travel hopefully is a better thing than to arrive." Robert Louis Stevenson
MD>Canada>AK>WA>OR>CA>AZ>UT>WY>SD
https://www.thesamba.com/vw/forum/viewtopic.php?t=620646
Building a bus for travel in Europe (euroBus)
https://www.thesamba.com/vw/forum/viewtopic.php?t=695371
The Western Syncro build
https://www.thesamba.com/vw/forum/viewtopic.php?t=746794 |
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dobryan
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MarkWard
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| Posted: Thu Dec 24, 2020 7:38 pm Post subject: Re: Transmission axle seal leak? |
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To really know you’ll need to pull the cv flanges and the plastic retainers. It’s either the lip seals or the o rings. I’d be doing both if you don’t know the age of the cover O rings. Fairly straightforward if you have a tool for spinning the collars out. Do one side at a time and if you remove the collar, center punch reference marks and measure the depth. You can also count the revolutions.
I’d expect to see more residue on the cv flanges from CG force if it were the lip seals, but they could be weeping just enough to run down behind the plastic retainers.
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dobryan
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Wildthings
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| Posted: Thu Dec 24, 2020 7:53 pm Post subject: Re: Transmission axle seal leak? |
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Clean up the old grease and pries out the cap hidden under it, take those duck nosed snap ring pliers you bought and remove the snap ring making sure it doesn't fly around the room and pull the flange off the shaft.
You will need to remove the plastic lock ring to access the seal, the seal can be removed with a seal pulling tool. As mentioned don't turn the adjusting nuts unless you have punch marked their position. |
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mrshrimp
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| Posted: Fri Dec 25, 2020 12:27 am Post subject: Re: Transmission axle seal leak? |
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| I bet it’s the o-rings. Thought mine was the flange seal and replaced but still seeps. Talked to very knowledgeable tranny builder and he said it’s more common for the o-ring to leak than the flange seal. |
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djkeev
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dobryan
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dougnlina 
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| Posted: Fri Dec 25, 2020 8:59 am Post subject: Re: Transmission axle seal leak? |
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Plan on replacing the o-ring. There is also a seal that covers the clip ring that is usually siliconed into place. The housing that the o-ring seals is how the pre-load is set on the differential, pay attention to its clocking. Otherwise it is a pretty easy job and highly satisfying to stop that particular leak 
BTW Merry Christmas!
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?Waldo?
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| Posted: Fri Dec 25, 2020 12:14 pm Post subject: Re: Transmission axle seal leak? |
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| Did you check for a clogged trans vent? |
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