I was getting down and dirty tracking down my battery cables to be replaced, when I notice this hole in the bottom of my tranny. I could poke my finger in, and feel gears. It's a hole that looks like should have something in it, the casing's not busted. There's a flat bottom section, just rearward of the starter, that's where the hole is. It's maybe an inch in diameter. What I don't understand is, the hole was not threaded for something to screw in. Do these things have freeze-plug-type-things in them? WTF????



Hopefully there's no irreversible damage, it shifted find last time I drove, and there's not a puddle under the car where it currently is.

need pics :P

hhmmm, we'll see what I can do tonight. I looked all through the only service manual, and couldn't find anything. I'm guessing it's something simple. If anyone has a pic of the bottom of their tranny, that might help.

thats an inspeciton hole for something, it had a rubber plug in it originally

Is this a general rubber plug that I can get anywhere, and just shove it it? Or is this a "certified to rape your wallet mazda rx-7 specific" rubber plug? I'm guessing there will be 2 washers and a bolt involved?



you know me, I gotsta have the details

its just a rubber plug, i think any 84+ rwd 4cyl mazda uses it. it doesnt hurt anything if you leave it out

So it's ok to leave it out? Like I said, I could see gears in there, so it wouldn't hurt anything to leave that exposed to humidity and what-not? Should any kind of oil/lube reside in there, or is this space separate from the lube part of the transmission?

ok, n/m. I just called the dealership, and the said that it's for excess oil to drain out, since the clutch there is supposed to stay dry. I'm surprised I didn't notice that before. Neat!

your not seeing gears, your seeing the flywheel

ahhh, ok. You learn something new every day.

well, the gears of the flywheel



not the gears of the transmission

so did you inspect while looking in the inspection hole?

I didn't have a flashlight in hand at the time, and I was focusing on the wiring. What should I inspect for? I should be under there tonight.

obviously leaks, and broken gears on the flywheel, I wouldnt

bother looking in there, you can only see so much.

ok, I'll just be sure to clean up around it, so that I could notice a leak later on if need be.

Heres a pic of the bottom of my FC hope this helps.

Drool

awww open wastegates sound better https://www.nopistons.com/forums/pub...R#>/tongue.png

I think your tranny might be different underneath (n/a vs. TII). This plate is about where my hole is:

yes baldy, the NA tranny that our cars have is TOTALLY different. That plate is for changing the gearbox gut when jim blow his gearbox up lol jk

jim you had to post that...



well i guess goals are a good thing

Do you wash and wax the bottom of your car?

Yes, the NA tranny and t2 tranny very quite a bit. Is it all the way on the bottom, meaning there is no fluid? Is it threaded?

No fluid, no threads. I'm convinced it's the drainage/inspection hole.

J9 is right on.





http://pengaru.com/~swivel/cars/rx-7...w_IMG_1473.JPG



You can sortof see a black raised disc just to the left of the bore for the long trans <-> engine bolt that the starter obscures when you install it, thats the top side of the plug.



The drain plug the dealership is referring to (weeper hole) is behind it just a bit to the left, you can see the casting contours how they lead to the hole so oil can drip out. Thats where you'll see oil dripping from when your front trans seal goes.



it's no big deal to have the plug gone, just might let some excessive moisture and dirt get up in there...

If it's the one I am thinking of in the bellhousing you wouldn't feel gears, you would feel the ring gear, but not multiple gears, this is supposed to have a rubber plug in it to keep the dirt and **** out.

aahhhh, very good. I'll see to getting that plug.