So I made my self some fancy delrin rear diff mounts.



Guess what? DO NOT EVER USE THOSE. ESPECIALLY if you have a racing beat torque brace for the engine.



Anyone want to guess what the outcome is? I'll put up pics after I get out of the shower

broke the diff case?

whole rear subframe fell out, damn it you shower long like a woman :p

sorry the computer is giving me ****.



The transmission case cracked and started leaking tranny fluid.

[quote name='Cheers!' date='Jun 1 2005, 09:44 PM']sorry the computer is giving me ****.



The transmission case cracked and started leaking tranny fluid.


[/quote]



=(



it's leaking tranny oil... i noticed a nice spot under the car today as I lifted it up. I wonder if ithat is what is killing my clutch... i opened up the inspection plate and could not tell if the disc was wet or not... will drop it tommorrow

it's only a mear fleshwound!!





but in all seriousness that sucks

Were you hitting it with a hammer or what? What are all those dents?

Most of those look like overstressed casting cracks.



Did the motor blow up at some point in that car? Looks like a thousand years of grime has accumulated under there.



And for god sake, PUT THE HAMMER DOWN! What did that tranny ever do to you? I could see beating the **** out of it after it gave you problems, but damn.

do you have a solid trans mount too? i have solid engine mounts and delrin trans mounts, has about to do diff mounts too....

[quote name='TYSON' date='Jun 1 2005, 10:14 PM']Were you hitting it with a hammer or what? What are all those dents?


[/quote]



yup. I was trying to see if i could knock a crack apart. But I couldn't It was a 12 mm wrench that I tapped it with.



I don't know where all this tranny oil is coming from then, because the last time I replaced my clutch 20,000 kms ago i replaced both the front and rear tranny seals. Looks like I will know tommorrow for sure.



When the car was brand new the owner had the car undercoated, it's the stuff that doesn't dry and you can't really remove it...

maybe from the shifter?

[quote name='Cheers!' date='Jun 1 2005, 06:27 PM']So I made my self some fancy delrin rear diff mounts.



Guess what? DO NOT EVER USE THOSE. ESPECIALLY if you have a racing beat torque brace for the engine.



Anyone want to guess what the outcome is? I'll put up pics after I get out of the shower


[/quote]



One of the cars I built used:

Delrin upper diff mounts, steel tranny mounts, steel engine mounts, steel front diff mount, steel torque limiter (no shock like the racing beat unit incorporates).



I built all of the mounts myself. I don't like using aluminum pucks in place of the stock mounts, so I welded new engine mounts altogether that mount directly to the subframe. For the tranny, I made a one piece unit to replace the entire crossmember assembly. The torque limiter was incorporated to the rear of a triangulated strut tower bar.



The car has yet to see any problems other than excessive NVH to the driver, and it has been running for a while now....



Between the two of us, one of us will be an isolated incident.

[quote name='Cheers!' date='Jun 1 2005, 06:55 PM']=(



it's leaking tranny oil... i noticed a nice spot under the car today as I lifted it up. I wonder if ithat is what is killing my clutch... i opened up the inspection plate and could not tell if the disc was wet or not... will drop it tommorrow


[/quote]



Your pictures don't look like anything outside of the normal casting cracks... all of the tranny casing have them, even brand new trannies.

[quote name='scathcart' date='Jun 2 2005, 01:08 AM']Your pictures don't look like anything outside of the normal casting cracks... all of the tranny casing have them, even brand new trannies.


[/quote]



I guess I just have no other tranny to compare to that is what is giving me concerns. I did notice it's leaking. THe bottom of the tranny is all wet with fluid, and a spot of tranny oil built up on the ground rught underneth the inspection cover / bell housing. I opened it and took a look see, and the flywheel looked dry and the disc looked a bit worn.



Right now i'm trying to figure out where a tranny would leak from. The drive shaft looks dry as well so it doesn't appear to be the rear seal. THe flywheel and PP look dry so that might rule out the front seal. The neutral/reverse switch was soaked in tranny fluid as well as the starter. Quite a bit must have leaked out because the presilencer was oily. However when I drained the tranny I got alot of oil out. I wonder where it is coming from.

Sorry to read about that J. I am willing to bet the leaking tranny is just coincidence, and really has little to do with your diff mounts.

Many castings have those lines.

The aluminum was a little cool, and/or the flow was a little slow when it was cast.

The result is not perfect, but still probably up to spec.



I suspect a loose neutral or reverse switch or maybe the linkage seal.

Ok so the clutch is in perfect condition. Flywheel is in perfect condition. Pressure Plate in perfect condition



Anyone want to take a guess why it started to slip? I'll give you guys 3 chances before I reply back with the answer.

[quote name='Cheers!' date='Jun 2 2005, 03:58 AM']Right now i'm trying to figure out where a tranny would leak from. The drive shaft looks dry as well so it doesn't appear to be the rear seal. THe flywheel and PP look dry so that might rule out the front seal. The neutral/reverse switch was soaked in tranny fluid as well as the starter. Quite a bit must have leaked out because the presilencer was oily. However when I drained the tranny I got alot of oil out. I wonder where it is coming from.


[/quote]



Take out the guess work and get a leak detection kit.

Cdn tire sells an alright one for $50, meant for use in the oil system. You throw in some dye, run the engine, wear some fancy goggles, shine a fancy flashlight, and then wait for the fancy fluid glow to show up.

No reason you couldn't put it in your tranny, disconnect your halfshafts at the rear pumpkin, set the car on jackstands, get proper exhaust ventilation,. and then run the car with cruise control on.

You'll see exactly where the leak was coming from.



Works for me.

[quote name='Cheers!' date='Jun 2 2005, 06:11 PM']Ok so the clutch is in perfect condition. Flywheel is in perfect condition. Pressure Plate in perfect condition



Anyone want to take a guess why it started to slip? I'll give you guys 3 chances before I reply back with the answer.


[/quote]



1. Too much power. (unlikely)

2. Step machined into flywheel... but thats not really a perfect flywheel.

3. sticking clutch hydraulics causing the pressure plate to be pratially disengaged all the time.

4. Incorecctly adjusted clutch pedal freeplay causing patrial pressure plate disnegagement at all times.



5. You put the clutch disc in backwards. https://www.nopistons.com/forums/pub...DIR#>/wink.png

(That one had better not be it!)

[quote name='scathcart' date='Jun 2 2005, 09:29 PM']1. Too much power. (unlikely)

2. Step machined into flywheel... but thats not really a perfect flywheel.

3. sticking clutch hydraulics causing the pressure plate to be pratially disengaged all the time.

4. Incorecctly adjusted clutch pedal freeplay causing patrial pressure plate disnegagement at all times.



5. You put the clutch disc in backwards. https://www.nopistons.com/forums/pub...DIR#>/wink.png

(That one had better not be it!)


[/quote]



well since i'm honored by having scathcart post in my thread I'll answer. (no disprespect with the sarcasim ofcourse, i just think your one of the smarter rx7 guys around).



THe Disc still has 60+% life left in it. THe flywheel has no heat damage and is in

mint mint condition. Looks like it was just resurfaced, which i did less than 20,000 kms ago.



The culprit... The breather decided to stop working. So when you are at the track and you are running her real hard the air has to go somewhere. With the breather clogged up the air has no where to go. So where does it go???? IT PUSHES OIL PASS THE FRONT AND REAR MAIL OIL SEALS !!!!!!



arggghhh!!!!!!!!!!!! Immediately when I took a close look at the tranny I could see a nice spray pattern of oil near the tail of the tranny and oil dripping from the inspection plate.



So i have a perfectly good clutch disc ruined because it's completely

soaked in oil then got cooked in. I'm not a happy camper.



That and I just spent 630 bucks on a a SPEC aluminum flywheel and their stage 3 clutch kit. I'm getting contingency sponsor from them as well as a 25% front end sponsorship. I would rather not have had to change anything. I was content on my OEM setup...

its always the little **** that bites you in the ass.

Heh. That's a new one to me.

reminds me of last summer when i was changing my tranny, the breather was clogged i took it for a drive so it would drain better, and when i took the plug out it exploded, burnt myself really good, and smelt like 80w90 for 5 days.

[quote name='nismo convert' date='Jun 3 2005, 12:28 AM']reminds me of last summer when i was changing my tranny, the breather was clogged i took it for a drive so it would drain better, and when i took the plug out it exploded, burnt myself really good, and smelt like 80w90 for 5 days.


[/quote]



How did you change the breather out? Is it threaded in there or is it pressed in? I'm going to order a new one from mazda in an hour.

Jason, I will look at the junk tranny tonight and find a way. I am stuck at work right now

Of course no leakage is beast, but if it happens..



I wonder if a copper/ceramic clutch would resist oil better?

[quote name='Cheers!' date='Jun 3 2005, 08:07 AM']How did you change the breather out? Is it threaded in there or is it pressed in? I'm going to order a new one from mazda in an hour.


[/quote]





Its threaded in.