Two questions: #1) transmission leak, #2) empty rubber gromet for relay.

x98boardwell · x98boardwell's Garage

Hello,

Questions #1,

This is regarding my 87-930 4-speed transmission. The transmission is leaking from the square plate in the photo below. Can I drain the transmission, remove the plate and seal and reinstall with everything in the car?

I am afraid that this plate is holding something in the trans so when I remove it something will fly out. I'm trying to avoid a catastrophe.

Question #2,

I have a loose/empty rubber relay grommet in the engine bay by the cdi box and panel that holds the over-boost/yellow relay and others. It's the one in the middle of the photo and has 3 holes with metal fitting, so I'm guessing that the relay would also have 3 pegs unlike most which have 5 or so.

Any thoughts? You help is appreciated.

Bryan

DSPTurtle · 08-20-2008, 03:29 AM

That plate has a fork on it that locates the shift fork. They are notorious for leaking. Have you checked to see if the nuts are still properly torqued? Mine started leaking almost immediately after a full rebuild and I know the nuts are torqued, new gasket, clean surfaces and both paper gasket and DOW 721 sealant. Ugh...
Here is a pic. I am going to remove mine with everything still in the car but I don't want to say that getting it realigned and reinstalled is going to be a cake walk

DSPTurtle · 08-20-2008, 03:31 AM

Opps, here is the pic...

x98boardwell · x98boardwell's Garage

Thanks for the pics and advice. I did tighten mine a little to see if that would help.

I also appreciate the picture as I would of had no idea what to expect underneath. Do you plan on taking this apart soon? I have a few questions.

1) Does what gear the transmission is in affect the removal and re-install of the plate?
2) From the pics, are you not just sliding the plate over that shaft or is the shaft attached someway to the plate?
3) If you would like, PM me your phone number. This may be worth a phone call to better understand under that plate.
4) Do you have any other pics of underneath the plate and how is attaches to the linkage/shaft?

Thanks,
Bryan

NathanUK · NathanUK's Garage

Bryan #1 is easy. If it doesn't go right just drop it and try again. I've had mine open on my 3.2 several times. It's a good part to remove to have a peek around for any swarf or dog teeth...

x98boardwell · x98boardwell's Garage

Nathan,

Thanks for the help. I was under the impression that once I loosened/removed the plate that I would have to loosen/remove another part behind it before it would allow me to fully take it off.

If you just pull it off and then stick it back on then I am not concerned. Am I correct?

Thanks,
Bryan

NathanUK · NathanUK's Garage

Yep, that is correct.

x98boardwell · x98boardwell's Garage

1) Is the part number for the gasket I need in this gasket set? 930-300-911-00
I don't think that I can purchase just this one gasket.

2) Is that empty rubber grommet for the CIS tester?

Thanks,
Bryan

NathanUK · NathanUK's Garage

Bryan, you can buy individual parts from Porsche or you can buy a whole gearbox gasket set (gaskets, seals & o-rings). I don't have PET on this machine, I'll check it for you soon. Send me a PM if I forget...

x98boardwell · x98boardwell's Garage

Nathan, you have a PM. Thanks.

A930Rocket · 08-22-2008, 11:34 AM

The gasket is available seperately. Mine leaked ever so slightly after my rebuild. A new gasket and some Loctite case sealer did the trick. Tried silicone to no avail (even after I was told it wouldn't work...)

It's a piece of cake to swap out as well. You may need to let it drain for some time to get it completely free of trans dope and wipe it down with a cleaner before re-assembly..

x98boardwell · x98boardwell's Garage

Jim or Nathan,

Do either of you have the part number for that gasket? I cannot seem to locate it. I have searched all over.

Thanks,
Bryan

rsrmike · 08-22-2008, 05:22 PM

Silicone will work fine if it's cleaned properly,
You just about have to let it drain overnight and still clean and install quickly before more gear oil can wick down to the sealing surface.

Case sealer is an anerobic compound designed for metal to metal machined surfaces.

It is not ideal for anything else requiring an o-ring or paper gasket in your case.

It's also more prone to failure through contamination than silicone

Try to use a good silicone like permatex ultra-grey. There are no small oil passages to stop up in the trans like there are in the engine so it is not as dangerous to use silicone on the trans...

NathanUK · NathanUK's Garage

According to PET it's the same part as the 915.
915 303 225 00 gasket quantity 1
Sorry it took so long but they really need to update PET so it runs on newer hardware.

NathanUK · NathanUK's Garage

I just checked again for an '87. It is the right part and is for the 930.36

x98boardwell · x98boardwell's Garage

Nathan,

Thanks for the help in digging up that part number. Now, I can drain everything and wait for a few days until I get the seal so all of the Swepco can escape.

PS. What am I able to look at while I'm in there. Should I look for anything in particular since I will have a view of the inside?

Bryan

x98boardwell · x98boardwell's Garage

Jim, Nathan or Mike,

When I put the gasket between the plate and trans should I add the sealant to both sides of the gasket so that both sides are covered with the permatex?

I purchased the Permatex "High-Temp RTV Silicone Gasket Maker". It is in the orange tube good for up to up to 650 degrees, remains flexible and is pressure resistant. I think this should work just fine correct?

Thanks,
Bryan

A930Rocket · 08-23-2008, 05:32 PM

I tried the high temp RTV and it didn't work. both surfaces were cleaned and dry as the trans was out of the car and upside down while I did the job. Maybe you'll have better luck.

I used Loctite case sealer on both sides of the gasket. Hasn't dripped a drop since.

Not much to see or do when the platr/guide is removed.

A930Rocket · 08-23-2008, 05:40 PM

That plug was in the aluminum sheet metal, but has been pulled down for some reason. I have the same, plug with nothing in it.

The red relay should also be a black one. The red ones are fuel pump relays only.

Quote:

Originally Posted by x98boardwell

Hello,

Question #2,

I have a loose/empty rubber relay grommet in the engine bay by the cdi box and panel that holds the over-boost/yellow relay and others. It's the one in the middle of the photo and has 3 holes with metal fitting, so I'm guessing that the relay would also have 3 pegs unlike most which have 5 or so.

Any thoughts? You help is appreciated.

Bryan

x98boardwell · x98boardwell's Garage

Jim,

Thanks for the help. I will save the RTV for another day and use the loctite case sealer as you suggested. From what you have said, this will be a better solution.

I am letting the trans drain for a few days before I finish cleaning the surfaces and put the plate back on. I wish this was also out of the car and upside down but I don't have the time or a good enough reason to do so at this time. This will have to last until my rebuild and the major work starts (hopefully 2 more years).

Lastly, regarding the picture with the relay. I was told by another pelicany that this was a tester for the CIS system. Can you verify that this in fact correct? Only 3 of the holes in the relay grommet have metal in them, meaning whatever you plugged in would only use 3 pegs/studs to connect. I'm just wondering if something should be there or not and what would that "CIS tester" even tell us?

Thanks,
Bryan

PS. I will change he relay in back from red to black. What is the difference between the two internally?