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Tranny fluid leak
#1

I have a small leak (drop or 2 a day) from the tranny. I looked it over clasly and found that it was at the fron of the tranny housing. Has anyone had this issue before? Is there any way that I can stop the leak without doing a rebuild?



I wouldn't mind having it rebuilt, but not in the budget right now. It is slow enough that if I top off the fluid every month or so I should not have an issue, just a pain, and I hate drips!



Any thoughts or advice?



Thanks,

Randy
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#2

Front of the tranny housing is probably the input shaft main seal. You have to pull the trans to get at that on a 944, possibly not on a 968 as I had mine done when the clutch was replaced.
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#3

I had a small leakage in the front of the bellhosing,

this was due to a clogged ventilation tube on the top of the gearbox.

Oil was pressed out trough the main seal.

My mechanic cleaned it out and no more leakage.
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#4

As a follow-up to this thread, is there a consensus as to what has to be removed to replace the front seal at the transmission input shaft? Mine has a small leak, and if the tool I need to remove my flywheel doesn't arrive by this weekend, I might tackle this, as long as it doesn't require removal of the transmission, which would really ruin my day. Has anybody ever done this? Thanks.
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#5

Speaking from having done the clutch on my 944 where the tranny has to be removed and the torque tube rotated 90 degrees.... I don't see how you could do the seal without removing the tranny. There is a port in the rear bellhousing where you can access the slide collar that joins the torque tube shaft to the input shaft, but even with the gap between the shafts that could allow the old seal removal with some difficulty, I don't see how you would have room to properly seat the new seal.



It has been awhile so I could be wrong. Worth taking a look back there to see if it looks possible, but.......
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#6

Hmmm... Not exactly what I wanted to hear. I'm on a mission to eliminate all of my leaks, and this is on the list. I suppose I should break down and take a look in the manual <img src="/forum/images/smilies/968/wink.gif" class="smilie" alt="" /> . So, excatly how much work is it to remove the transaxle? It sounds intimidating, but compared to all the other stuff I have planned (pulling the oil pan gasket, pulling the head to have it rebuilt, etc.) I'm wondering if it is really all that bad...
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#7

It's really not that bad of a job. The hardest part for me was getting the slip coupler to slide off the splined drive shaft. Also the space is very tight with the spare tire compartment kind of in the way when sliding the tranny rearward to remove.
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#8

When I had my clutch done they did the seal without removing the tranny. That being said, they do it all the time so expertise probably played a role in that operation.

944 is a totally different animal, when I did the clutch everything came out of that car <img src="/forum/images/smilies/968/mad.gif" class="smilie" alt="" />
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#9

I took a look this afternoon, and to me, it looks like Porsche went out of their way to make the input shaft seal replaceable without having to remove the transmission. If you remove the large rubber cover piece, you can very clearly see the input shaft seal. You also have very clear access to the bolts holding the retaining piece that look like they hold the input shaft in place. There are actually two retaining pieces - one is accessible through the opening that's covered by the large rubber piece, and the other is accessible through a hole in the torque tube. So, it looks like all you have to do is remove these bolts, which I'm assuming will allow you to slide the drive shaft toward the front of the car, away from the transmission, which will then expose the input shaft seal.



Has anyone recently done this job? Mine is leaking a bit, and I would like to replace it, but it isn't leaking badly enough for me to want to yank the transmission, which looks pretty brutal.
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