 Transmission Vent |
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| 914e |
 Jan 4 2021, 08:33 PM
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#1
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Member  Group: Members Posts: 496 Joined: 21-February 20 From: Arizona Member No.: 23,951 Region Association: Southwest Region 
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I just changed motors a few weeks ago. Now on what was a dry transmission for months is leaking out the front seal like crazy. I had fixed the leaking output seals and speedo seal.
Could a plugged transmission vent cause it the seal to blow out? I drove it around on the old motor maybe only 15 miles. On the new motor it started leaking fairly quick. I was winding it out to about 6000-7000 rpm, will that cause more pressure in the transmission case? I pulled the vent and could not see much in it. I cleaned it out with brake cleaner, should there be valve or something in it? Or is it more likely the input shaft moved around enough mating back to the clutch that the decades old seal gave out? |
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| mepstein |
Jan 4 2021, 08:37 PM
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#2
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914-6 GT in waiting Group: Members Posts: 19,307 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region
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It’s just an open vent (no valve) but it does have to be facing the right direction or air pressure will suck the oil out. A common thing to forget on 915 trans conversions.
Also make sure it’s filled the correct amount. Car needs to be level when you check. |
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| 914e |
Jan 4 2021, 10:14 PM
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#3
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Member Group: Members Posts: 496 Joined: 21-February 20 From: Arizona Member No.: 23,951 Region Association: Southwest Region
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QUOTE(mepstein @ Jan 4 2021, 07:37 PM)  It’s just an open vent (no valve) but it does have to be facing the right direction or air pressure will suck the oil out. A common thing to forget on 915 trans conversions. Also make sure it’s filled the correct amount. Car needs to be level when you check. It is a 901, if I understand correctly the vent hole is facing forward. Which is the direction it was, and the direction I put it back. |
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Posts in this topic
914e Transmission Vent Jan 4 2021, 08:33 PM
ClayPerrine Also, To run a 915, you have to flip the ring and ... Jan 4 2021, 09:30 PM
ClayPerrine
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