Transmission Leak - seal replacement question

[rsofedm]

I have a 91 TSi 5MT AWD.

Replaced the transmission (for a broken 2nd gear and worn syncros) after I bought it with a rebuilt/used transmission. It worked fine for a while and then started making an odd grinding noise which I discovered to be:

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The bottom trans cover had the middle shaft's nut spin off and grind into the cover and bust a hole through it. Luckily I had a spare (top) which I cleaned up and installed correctly after properly torquing and notching the nut.

So I took it for a drive and came back to it leaking oil out the bellhousing. The oil was cool so I presumed trans oil (confirmed after smelling). So now I'm at the point of "where is this leak coming from". It's been suggested to me that it could be the input shaft seal which makes sense as if one of the shafts had play it could have prematurely worn that seal down.

If this is indeed the problem, I've got the following pages from the service manual:
http://dl.dropbox.com/u/22942132/DSM 1G trans shaft seal replacements.pdf

So my questions are thus:

1. Is that the best way to replace it? If not is there an easier method?
2. Any suggestions for what else it could be?

Any help would be very appreciated.

 

[dsmpat95]

Your gonna have to drop the transmission to know. Its a good chance its your input seal.
If its your input shaft seal you will have to split open the transmission to replace. Its not fun.

 

[rsofedm]

Your gonna have to drop the transmission to know. Its a good chance its your input seal.
If its your input shaft seal you will have to split open the transmission to replace. Its not fun.

Yeah I've got the transmission out. I'm just hoping osmeone has tips on how to verify it's that seal or something else before I start tearing it apart

 

[rsofedm]

I've replaced the input shaft seal. Can someone verify that the output shaft seal is this one: MD723202

 

[19Eclipse90]

MD723202 is the seal for the center diff shaft -- the one going to the transfer case.

 

[rsofedm]

well it really wasn't that bad to replace... just take your time and label everything and make sure you know where it goes.