tranny 915 symmetric parts

[pino]

During disassambling my tranny, some parts got dislocated and I lost track what the actual orientation is. Could somebody tell me whether I could consider most of the parts symmetrical or not? For example the bearing of the intermediate case, like part 2 (I guest, I can not see clearly in pic, which are from Randy's threat I hope he does not mind), in particular the solid ring (part 55 I think).



Furthermore, I don't see any resemblance between Randy's shims and mine (besides the shape). Mine are almost transparent and plastic like. Can anybody tell me if that matters or not? Should I buy better ones?

[ChrisBennet]

I try to keep the roller bearings in their original orientation but I've flipped them a time or two without any obvious consequences.
All the shims I've seen have been metal.
-Chris

[pino]

So, how do I know what the orientation is, because I lost track during the disassembling. A blown up schematic should help a lot. Is there one available or are there other tricks? Your right about the shims. I thought shims were gasket (the ones on the outer edge of the cases). I'm not that familiar with the vocab. How critical are the gaskets? Can I reuse them?

[djmcmath]

I think you're confusing gaskets with shims. The gaskets almost certainly did not come apart as cleanly as the two items you have laid out above. Those look way more like shims. I'm a little surprised at the "think plastic" description, though.

Assymetrical parts are generally fairly distinct. Off the top of my head, the only assymetrical ones were the 1st gear synchro dog-teeth and the 1-2 slider, which has to be oriented so the assymetrical teeth point towards 1, not 2. Other than that, it seems like all the thrust bearings, thrust washers, etc. were flippable with no obvious consequences.

Your best bet on a good schematic is the Bentley's manual. It has a full page schematic for each shaft.

Good luck,

Dan

[SpeedracerIndy]

I think what Chris was saying is that it is a good idea to try to keep the orientation the same as the way it came apart, but it is not necessary. As Dan said above, none of the roller bearings, washers, etc. are asymetrical.

Not that it helps now, but when I took mine apart I slid everything off of the shaft, tied it all together with electircal ties, and put everything is ziplock bags. It worked very well when I had to put it all together a month later.

[ChrisBennet]

My tech notes page has reproductions of the Haynes and Factory manual pages. 915 Transmission, Some Haynes and Factory manual pages

Drive shaft:



Pinion shaft:



-Chris

EDIT: I don't know why the images "IMG" aren't working (linked to my web site). The links to the images work but you have to hit Refresh to see them.

[pino]

I think you're confusing gaskets with shims. The gaskets almost certainly did not come apart as cleanly as the two items you have laid out above. Those look way more like shims. I'm a little surprised at the "think plastic" description, though.

by Dan

The pics are somebody else's my shims look the same. However, my gaskets are actually plastic like. You could almost see through it.

Assymetrical parts are generally fairly distinct. Off the top of my head, the only assymetrical ones were the 1st gear synchro dog-teeth and the 1-2 slider, which has to be oriented so the assymetrical teeth point towards 1, not 2. Other than that, it seems like all the thrust bearings, thrust washers, etc. were flippable with no obvious consequences.

by Dan

Ok, I will not worry about that. Thanks Dan and SpeedracerIndy??

Chris, is there another way to get your pics and "Tightening Torques" values? Or are those values for something else than the tranny?

[rcecale]

Pino,

Take a look through my thread. (The one you got the pics from ) I believe I have a link to the article Chris wrote, which has a load more pics. It should help you a lot. I used his article while doing my own work.

Randy

[pino]

Hey Randy, you gave me strength. I finally started . I did not noticed that link you are referring to. After, I printed that thread and it was about an inch thick. Is the tranny still working well, otherwise I have to start listening to other people. Anyway, I will have a look to Chris' thread. I was already looking for it but did not succeed. So thank for the hint.

[ChrisBennet]

pino,
I don't remember making a thread on that (but I forget a lot ). You've got a PM pino.
-Chris

[rcecale]

Chris,

I'm sorry, I mistakenly said I used a Tech Article that You wrote. It was actually Marcesq who wrote this.

I must have confused that article with the thread on the Bennet Porsche that you've been so involved in. You also provided some assistance in my own thread, and it was greatly appreciated.


Pino,

I have almost 3000 miles on that tranny since my project. It's a great feeling of accomplishment, even now. Go for it, man...you can do it.

As far as "listening to others"...the best advice I can give you is "do it!" There are several people here that are extremely knowledgable about this stuff. I certainly wouldn't have been able to do it without them. As you read through my thread, you'll see who I talking about...Chris Bennett, John Walker, Grady Clay, Jim Sims, UTKarmann_Ghia, Ischmitz... There are more, but I could be writing for quite a while to list them all.

Keep us posted!

Randy

[pino]

I'll have a look at that article, thanks anyway Randy. Already 3000 miles, my hands starting to itch again. I'm looking forward enjoying mine. However, the tranny isn't the only thing, I've also got some chassis work to done (main problem).

Ok, some serieus stuff. What keeps the oil inside the tranny when it comes to the pinion axes (I mean, the longer one anyway). I only found this circled spring, shouldn't there be more than that. I got the feeling there should be more, since oil was leaking when I tilt the tranny on it's "front" (the face normally attached to the engine).


Secondly, as my wallet is the bottleneck I already flipped the 4th and 5th synchro rings. I'm thinking flipping the 2nd one as well. The 1st and 3rd can not be saved as well as the 3rd-4th slider (that is going to cost me I guess). Now, the quention is wether I could save money by using a dremel for this second gear. Can it be saved?


What is PM Chris, personal mail account? To be frank, I'm not familiar with the forums 'code'. If I'm right, am I allowed just to give you my mail address(sound weird, but I'm not kidding)?

[pino]

I just scanned the article briefly and I'm a bit worried about the break bands. Surely, I see some wear patterns, but how does one inspect these things? Anyone?

[ChrisBennet]

Originally posted by pino
What is PM Chris, personal mail account? To be frank, I'm not familiar with the forums 'code'. If I'm right, am I allowed just to give you my mail address(sound weird, but I'm not kidding)?

PM = private message.

Click on the "user cp" button at the top of the page and it will take you to your Control Panel. On the top right side of the Control Panel page is a link to Private Message. Click on that link to see your private messages.

If you fill out your profile with your email address and check the "notify me" box you will get an email notifying you anytime you get a PM through the Pelican board.

-Chris

[rcecale]

Pino,

Personally, I flipped the 5th/Reverse synchro because it just didn't seem that worn. My 1st/2nd was shot so I replaced it, but 3rd/4th I replaced for the "piece of mind" It was worth it, I'm sure it will be for you too.

As far as using a dremel on your dogteeth, I surely wouldn't. But then again, I'm not the expert. It just doesn't seem like the right thing to do. Again, if for no other reason, change them out for piece of mind. I'm thinking you're not going to want to take it all apart again any time soon.

Randy

[djmcmath]

Look closely at the dog teeth in the picture you've posted. See how the tips are kind of rounded? Some of them have hooks, or even what could be chip-marks. If it was me, I'd replace that one, because if you don't, it'll be a real hassle re-opening the tranny to get it back out in a few miles.

I'm trying to think of anything inside the tranny that I'd use a dremel on, and I'm coming up with a blank. If you damage the gear dremeling the dogteeth off, you're in trouble.

Dan