GregBBRD

Decades ago, after building several 928 transmissions, I found that the complete lack of Porsche Factory tools for various operations was causing me some issues.
One of the main issues was seals that leaked or seeped gear oil. Seals seem really simple things, but they need to be perpendicular with what they are sealing and of most importance, they also must be absolutely square with the surface (one side of the seal can't be pushing in further than the other side) or they will seep (Instead of a seal, the sealing edge acts like a "wiper/slinger" as the part rotates inside of the seal.)

Nothing I had would do this job consistently, so I fabricated some special tools to help me do this job, perfectly each time.

Long story short, I need to have a couple sets of these tools made for people that have requested these and thought I'd see if anyone else is interested. (Yes, I made my original set, but I don't have the time to "carve" these out, so I'm going to have them made.) Price to be determined...according to how many of each tool I need to have made. However, I can't imagine the entire set costing more than a factory gasket set....or each tool costing more than buying the replacement seal which leaks. I'm not sure if I'll make them out of Delrin or aluminum, yet. That alsolso depends on interest.
Of course, since there's a group of A-holes out there that copy everything I make or do, I'd imagine that someone will "knock off" some/all of these items....so if you wait, you can buy these tools for $5 less, from someone else.
There actually are a couple of things that anyone can make, along with an extremely trick main shaft seal (5th gear) that we came up with, for consideration.


The essential mainshaft/5th gear seal installation tool. Extremely handy if you need to replace the seal with the transmission in situ.



Shift shaft seal installer. Yes, a socket will work, but the seal almost always leaks from being crooked. (And pops back out 5 times before you get it installed.) This tool pushes the seal in straight and to the proper depth, every single time.



If you've ever chased the shift shaft roll pins around your garage....or fished them out of the transmission case, this simple tool, made from a punch on my lathe is absolutely essential.



Looks like this, without the roll pin. Yes, this is simple to make at home, even with a bench grinder.



Here's that new mainshaft seal we came up with. Viton. Fantastic sealing. One half the price of the factory seal!



Stub axle seal installer. These seals are famous for leaking. This one I made 45 years ago, out of a chunk of steel. This one fits all 911/914 applications, too. (Thus the age of this one.).



Now, this is incredibly essential. Makes winding up those shift shaft springs and testing the shifting of the transmission a breeze. Yup, that's a used shift coupler with a chunk of aluminum machined to size and glued in.

Kevin in Atlanta

Greg, as usual great work.

Is there a factory tool for removing the housing to get to the o-ring(99970190440)?

Seems like most transmission shops break the ears getting it out.

Rob Edwards

9148 and 9140 are the combo for removing the front cover. Note the pinch bolt that goes through a notch in 9140, which is what the puller bolt is pulling against.

GregBBRD

I hear that and I just shake my head like the guy in the chainsaw commercial ("Let's hide behind the chainsaws" commercial.) I pick up every single one of these I can find which isn't ruined....and I stock brand new ones. (I can't bring myself to re-installing one that has the ears broken off, since I'm the "last one" that touched the transmission and I wold get blamed: "Wow...look at the crappy work Greg did!"

While I'm certain I've ever seen a tool, I never remove this cover, unless the transmission is coming apart. If the seal needs to be replaced, I drill a hole in the seal, slide hammer it our, and install a new one with my seal installation tool.

If the transmission is coming apart, pretty simple to make tools like the factory provided (Rob has the factory tools, but I made my own, years ago....I should picture those, too), and pull the cover, along with 5th gear.

GregBBRD

It's actually a bit strange that Porsche never made seal installation tools for the transmissions.

When I started building the Tiptronics for Singer (yes they make a few of their cars with Tiptronics), I made 7 different tools to install the seals at the perfect depths, perfectly straight.
No seepage/leaks allowed.
I know that Porsche didn't install all of these seals with a socket, since every seal is perfectly square and at the same depth.
It's obvious that they had to have special tools, but they never offered them.

The Forgotten On

Those tools look fantastic! It is genuinely odd Porsche never sold the tools considering they seem to have a tool for practically everything on these cars.

I think Delrin would be good for most of us that will use the tools once or twice and aluminum would be best for people like you who use them constantly.

Even if you matched the cost of most Porsche tools being ~$50-$100 for these applications I think you would have a lot of takers.

Wisconsin Joe

Actually, it's a Geico Insurance commercial.

But I know what you mean (read some of the comments).

RDON

Greg,

Main shaft and shift shaft seal replacement are on my short list to do. I’m in for 1 ea. of those installation tools when you have them available.