Oil in shift coupler boot in tunnel HELP?

[Johnb911]

Just took the interior apart today for the winter fixing season.

Took off the tunnel cover at the shift coupler and saw a bit of oil at the bottom.

Pulled back the boot and found about an ounce of oil in the boot.

The front of the boot is split a little but the rear seems ok.

Tell me this is old gease or something and not serious!!!!

It's the first time I have been in there since I bought the car this summer. I was getting ready to do the bushings. Now I will buy a new boot and wait for your advise.


HELP!!

John

[tab tanner]

Shifter seal, can be replaced while in the car if your careful. Don't worry there are alot of 911 with oil leaks LOL

[Eagledriver]

I had a bent shift rod on one of my cars that caused this leak. You can prevent 99 percent of the leak by parking the car in 2nd gear if the shaft is bent. This pulls the shift rod out and makes the offset due to the bend less. Beware that parking in 2nd on a hill won't keep the car from rolling as well as in first.

-Andy

[911pcars]

If you have an early 915 gearbox (sorry Andy), the seal is only replaceable from the .... inside of the gearbox housing.

A small leak isn't serious, but if it's easy to replace, you might want to go ahead and do it.

Sherwood.

[Dennis Kalma]

Oil seal, definitely....it is the only place where you can get oil into that spot.

The seal is a bit of a pain, I did mine using a small hook (sort of like an awl with the tip bent at 90 degrees. Jammed it into the seal and just worried it out....had to do a few holes.

New seal is easy, just a suitable drift/socket/piece of pipe...push it in. I seem to remember I actually put in two seals...but my mind is failing with age, so it may be wishful memory.

In any event, no more leaks.

Dennis

[mark 74 carrera]

I did this successfully myself. Our host has a tech article on this very repair. The key to removal as Dennis mentioned is the 90 degree small hook. Putting a new one on was easy.

It is a tight fit through the tunnel but it is possible I guess as long as you don't have an early one as mentioned above. I would say no more than a two beer job.

Mark

[Johnb911]

Thanks for all the info!!!!

tell me more about this " early one".

How does one know if they have an early one?
What issues present themselves with the early onees?


john

79 911 SC ROW

[mark 74 carrera]

I do not think your car has an early version of this transaxle since its a 79. I always thought the 74 model year was the first 915 transaxle, but I may be wrong about that.

Mark

[slammed1000]

my 73 has a 915. i have replaced the seal in the car. i ended up making a seal driver out of a piece of pvc pipe the same od as the seal. biggest problem is fishing it out. you need a 90 deg. hook to pull it out. i ended up using a heavy duty cotter pin remover.

[911pcars]

My brain fade. I apologize for scaring the ***** out of anyone.

I was thinking about the input shaft seal on the clutch/flywheel end, not the shift shaft seal on the forward side.

However, in regards to the input shaft seal, according to Haynes, they say:

"From transmission numbers 733 7375, 783 0838 and 793 1031 onwards, the oil seal can be removed from the clutch bellhousing side without the need for dismantling the transmission ..."

In other words... disregard what I said about the front seal.

Sherwood

[Johnb911]

WOW Thanks.
This was my first real project besides the oil change and changing the steering wheel.

I just ordered the short shift kit last night and I already have the bushings. I guess I will noe order the seal and the two boots that are not in great shape.

Can someone lead me to a thread about how to change the tranny oil.

I may as well jump in and get it done right the first time.


Thanks all.


john

[slammed1000]

tranny oil change is simple....drain plug on bottom and fill is on the drivers side midway up the trans. everyone hear likes to run swepco fluid.......just fill it up untill fluid starts to weap from the hole your filling....

[Johnb911]

Man, I'm sorry but I went and looked under the car and have no idea where this fill hole is.

Now, everybody stop laughing.

Does someone have a digram or picture.

John

[911pcars]

Reminder to make sure the fill plug can be removed before draining the gearbox.

Sherwood

[Don Plumley]

Up on the left side of the transmission case. Rule #1 is to make sure you can get the fill plug out before you drain the transmission fluid.

[Johnb911]

Found it!!!!!!!!!!!

One lst question I hope.

How much fluid does it take when drained?

John

[john70t]

Cover bolt on bottom--open and drain.
Cover bolt on side--fill to overflow with Swepco when sitting on level ground. Should be less than a full container (1gal?)

[HarryD]

How I did my Oil change.

[Johnb911]

Thanks all very much for the help!

Very much appreciated.

John

[Gunter]

John:
The plug most likely has a shallow hex for an Allen wrench.
DO NOT use a regular 17mm? Allen wrench. Cut off a short piece from a regular Allen and put it into a 17mm? 1/2"-drive socket, then use a breaker bar with a short extension.
Make sure that the ends of the Allen are sharp so that it can bite into the hex. Crack the fill hole first before draining the 915.
Make up a funnel with a plastic hose that fits into the fill hole, its a little tricky to fill the 915.