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  #1  
Old 14th June 2020
Roane Roane is offline
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Default Oil leak

So, know this may be silly but any idea where this transmission oil might be coming from? I am getting a little oil out of a solid (return I think) line by a pushrod pooling at the bottom. I was thinking about seeing if the seal was bad there but curious if this bit looked like something else to any of the experts here.





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  #2  
Old 14th June 2020
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I suspect your going to find it's the main shaft seal or counter shaft bearing that's leaking.
You'll need to pull the sprocket cover to check.
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Old 14th June 2020
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have you seen this? http://xlforum.net/forums/showthread...070501&page=36 post#355 on.
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Thanks. Any idea what would cause the bearing to do that? Also, any other symptoms I should’ve concerned about? I’m reticent to work on it right away.


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in that thread it wasn't the bearing it was the gasket.a worn bearing would allow the mainshaft to have excessive movement.
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My bearing was ruined (twice) from an issue with a breach in the oil trough at the ceiling of the trans cavity. A leak like the one in your pic was my first clue. Second clue was I could move the main shaft sprocket a whole lot in any direction. At the end of fixing all of that, I copied the m.s. seal gasket onto a sheet of cork gasket material, cut it out and installed it with permatex copper gasket sealant making sure to not clog up the oiling hole. Hasn’t leaked from there since.
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Old 15th June 2020
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Thank you. That doesn’t sound too good. I’ll investigate.


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Seal/gasket on the nain shaft is no bug deal. I have run across a coupe engines that leaked around the counter shaft bearing and seen a few "slop on the goop" fixes when that pops up. You don't need to pull the gearbox if it's just the main shaft seal or gasket.
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So I should pull the cover and see if I can move the sprocket. If not, I need to pull it and the retainer and replace the seal? A simpler slop method would be great if I could get through the next two months or so without damaging anything.


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You will have to pull the sprocket cover and m.s. sprocket to tend to the seal anyway. Not a big deal.
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