Transaxle Seals, Transaxle Seals Relacement Options

[SteveNMaine]

Is there any procedure / video out there for replacing the seals in the transaxle? I have done this on other transmissions but just looking for any tips and tricks for the 914.

[technicalninja]

Polish the crap out of the output flange seal section.

If you have pitting or a groove where the seal lip ran, try to offset the new seal to clean metal. An offset of .020 can work wonders.

I pack all of my seals with Stay Lube marine grease. I've found it 15 years later when I've taken stuff back apart. Stays forever.

I would clean the flange bolt and the threads it goes into with B12, remove all of the 90w and use a small dot of blue Loctite on the bolt.

You should be able to use two CV bolts and a prybar to lock the flange for torquing of the flange bolts.

[ctc911ctc]

Dr Evil has a video set that is very good about all things 901 rebuild - there are some good points as to this part of a rebuild......cannot remember specifics however I do recall him showing how to remove, inspect, lube re-install and seat.....I recall the level of resess was very important. The videos are short money and I find them entertaining.......but yea, thats me!

https://evilwerks.gumroad.com/l/QmTqn?layout=profile

Thank you Dr. Evil!

[L-Jet914]

I disconnected the CV joints from the stub shafts, moved them to the side. I removed the two bolts hiding under the CV grease (17mm? if I remember correctly) that hold stub shafts to the differential. I inspected the stub axles for any damage none of which was found. I then used a seal puller to remove bolt axle(radial) seals. I then when to the local hardware store to find a bolt long enough so I could use a seal installer from a timing belt service kit I have. I then found a installer that matched the outer diameter of the seals. From that point I pressed in each seal to the same depth as the original VW marked seals that were in the transmission from factory haha. I did this all in the car using my QuickJack lift. I also purchased new CV gaskets and new schnorr washers to finish the install.

[brant]

I disconnected the CV joints from the stub shafts, moved them to the side. I removed the two bolts hiding under the CV grease (17mm? if I remember correctly) that hold stub shafts to the differential. I inspected the stub axles for any damage none of which was found. I then used a seal puller to remove bolt axle(radial) seals. I then when to the local hardware store to find a bolt long enough so I could use a seal installer from a timing belt service kit I have. I then found a installer that matched the outer diameter of the seals. From that point I pressed in each seal to the same depth as the original VW marked seals that were in the transmission from factory haha. I did this all in the car using my QuickJack lift. I also purchased new CV gaskets and new schnorr washers to finish the install.

In 40 years of 914s I’ve never had a leak from the output shaft seals.
Never change them unless I’m doing a rebuild

It’s the front seal on the main shaft that leaks

Or and drips occasionally on some cars from rear cover gasket

[ctc911ctc]

I disconnected the CV joints from the stub shafts, moved them to the side. I removed the two bolts hiding under the CV grease (17mm? if I remember correctly) that hold stub shafts to the differential. I inspected the stub axles for any damage none of which was found. I then used a seal puller to remove bolt axle(radial) seals. I then when to the local hardware store to find a bolt long enough so I could use a seal installer from a timing belt service kit I have. I then found a installer that matched the outer diameter of the seals. From that point I pressed in each seal to the same depth as the original VW marked seals that were in the transmission from factory haha. I did this all in the car using my QuickJack lift. I also purchased new CV gaskets and new schnorr washers to finish the install.

In 40 years of 914s I’ve never had a leak from the output shaft seals.
Never change them unless I’m doing a rebuild

It’s the front seal on the main shaft that leaks

Or and drips occasionally on some cars from rear cover gasket

(IMG:style_emoticons/default/agree.gif)

[L-Jet914]

I disconnected the CV joints from the stub shafts, moved them to the side. I removed the two bolts hiding under the CV grease (17mm? if I remember correctly) that hold stub shafts to the differential. I inspected the stub axles for any damage none of which was found. I then used a seal puller to remove bolt axle(radial) seals. I then when to the local hardware store to find a bolt long enough so I could use a seal installer from a timing belt service kit I have. I then found a installer that matched the outer diameter of the seals. From that point I pressed in each seal to the same depth as the original VW marked seals that were in the transmission from factory haha. I did this all in the car using my QuickJack lift. I also purchased new CV gaskets and new schnorr washers to finish the install.

In 40 years of 914s I’ve never had a leak from the output shaft seals.
Never change them unless I’m doing a rebuild

It’s the front seal on the main shaft that leaks

Or and drips occasionally on some cars from rear cover gasket

Mine being pretty much 50yrs old they were hard as rocks (rubber became plastic) and came out in pieces. When I changed my gear oil at work one day I found a huge puddle of gear oil under my car which were the axle seals (radial seals according to Porsche). I replaced those one evening before going to a car meet then found out my input shaft seal was leaking after I fixed the 1st leak. Which ultimately lead to a complete reseal, clutch and flywheel replacement. My father's 914 did sit from 1992 to 2003-4. I would have never found the 1st leak if I didn't change out the fluid as the fluid level was low enough not to leak out of them. Those rubber seals never last forever and ultimately become rock hard over time from temperature etc.