Self clearancing inside dry end of tranny, cause? +pics - D-series.org

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Old 02-26-2016, 04:01 PM   #1 (permalink)
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Default Self clearancing inside dry end of tranny, cause? +pics

Ok so Intec Racing is crooked, first off. Good tranny before swap, I get the second hand bits and now its immediately in for bearings and seals. (Isb was trashed, another 2 noisy and less than smooth) There's where we begin.

This was preexisting and I can't really tell if there was fresh damage done by the 300 feet I drove it before proceding to yank it back out, but i dont think so. there's this shiny metal that's been self clearanced by SOMETHING I can't figure out. It's inside the dry end right by the axles.

A very reputable and highly recommended shop says if everything is bolted up correctly the clearanced area is meaningless and I'll have a great transmission for years, but what CAUSED it? And what needs to be paid attention to now?

Tranny is s40 b000 bolted to JDM d15b non vtec converted to mpfi

Could it have been the bearings? Could it have been an improper clutch or a botched installation?

Gotten so much great info from the searches recently that I haven't posted here in 7 years...search is no help this time, neither is Google. I've even just sifted through images of damaged trannys on google. U guys got this though, right?
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Old 02-26-2016, 04:03 PM   #2 (permalink)
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The intec thing I don't wanna get into, but it's safe to say I wouldn't call them a HONDA shop anymore, and I wouldn't have em swap anything but a jz since that's their thing now.

The work on buddy's Honda was poor at best. One bolt in the starter? Cmonnnn
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Old 02-26-2016, 06:40 PM   #3 (permalink)
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That is from the clutch/pressure plate, nothing to do with the trans itself. But I don't think the flywheel is THAT big.
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Old 02-26-2016, 09:34 PM   #4 (permalink)
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See, I thought that too but there's no corresponding wear on the current clutch or pressure plate. How would one properly check to ensure there is no contact once installed? Simply turn the engine and listen through where the starter bolts up?
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Old 02-27-2016, 12:10 AM   #5 (permalink)
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I had a clearance issue with my y8 trans when i bolted it up with my action 6 puck clutch and cromoly flywheel. It wasnt anywhere near that agressive of a hit though, it simply had some casting flash that it ended up slightly hitting.

That is a pretty deep cut, and the sharp endpoint points to the flywheel ring gear teeth eating it away. Take a look at the ring gear teeth and see if they have aluminum on them.

Only thing i could think of would be a flywheel that is spaced out too far or has alot of runout.
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Old 02-27-2016, 01:35 AM   #6 (permalink)
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That could be a thin area to begin with. But if it is not leaking yet....

Did you buy the tranny like that? I wonder if a dual disc setup was used before?
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Old 02-27-2016, 07:09 AM   #7 (permalink)
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I know of no standard setups that would contact like that.
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Old 02-27-2016, 07:55 AM   #8 (permalink)
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Yeah it came in my buddy's car, someone had been Street racing it and all the good parts were swapped off as part of their deal according to my buddy (that gave me his swap leftovers).

Will totally be checking things out closely when I make it back out to the farm this afternoon
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Old 02-27-2016, 09:24 AM   #9 (permalink)
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Sorry for being super basic but manual trannys are new to me. My family always drove automatics. Aside from the odd slave or MC jobs I've done with friends I know nothing.
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Old 03-08-2016, 08:50 PM   #10 (permalink)
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Ok so the ring gear wasnt seated flush, was 3mm off on one side. Problem solved I guess.

On buddy's car, every 9th or 10th time he tried to start it he'd have to push start it, and some of the clearancing was evident pre swap. Could his starter issue be related to this?
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Old 03-08-2016, 08:55 PM   #11 (permalink)
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Ok so the ring gear wasnt seated flush, was 3mm off on one side. Problem solved I guess.

On buddy's car, every 9th or 10th time he tried to start it he'd have to push start it, and some of the clearancing was evident pre swap. Could his starter issue be related to this?
Wow, how the hell does that happen. is the ring gear pressed on or bolted on?

You can check your buddies car by removing the starter and spinning the motor over by hand without the spark plugs in and holding a piece of wire steady near the ring gear to see if it has any runout.

Ive never heard of a ring gear falling off though, thats a new one.
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Old 03-08-2016, 09:11 PM   #12 (permalink)
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Starter ring gears are a press fit on alum. flywheels. Cheap ones don't use the button head retaining screws as you can see here....



The issue happens when the flywheel cools down as the alum. will contract faster than the ring gear.
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Old 03-09-2016, 01:40 AM   #13 (permalink)
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Starter ring gears are a press fit on alum. flywheels. Cheap ones don't use the button head retaining screws as you can see here....



The issue happens when the flywheel cools down as the alum. will contract faster than the ring gear.
thats dangerous as fuck why the hell would someone think its ok to not secure a cast iron ring gear on an aluminum flywheel.
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Old 03-09-2016, 08:45 AM   #14 (permalink)
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This is the world of Honda's - #1 is price, #2 is any other factor (inc safety).

I've seen some other comparisons made by non-Honda people and in more than a few cases the heavier flywheel held more power on the same clutch. Alum also has less mass so it can't absorb as much heat. Heat dissipation is similar as it's bolted to a hot crankshaft & sits next to the waterjacket.

In other words, I'd only use alum in cases where fast shifting isn't a major factor in going fast.
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Old 03-14-2016, 07:44 AM   #15 (permalink)
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Ummm flywheel from buddy's car is what I used for the conversion. It's a steel, stock y7 piece. SHOULD it have been more than pressed on? My old domestic stuff was all just pressed so I figured i was fine.
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Old 03-14-2016, 07:49 AM   #16 (permalink)
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I don't even get the lightened flywheel thing. I'm going for gains in 60' as a means to et improvement in a modest 1.5L driver and less stored energy certainly isn't gonna help ME none.

Plus the thing is like impossible to stall which is great for Jessica who drives torquier stuff via a mt now.
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Old 04-11-2016, 10:17 AM   #17 (permalink)
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Hey so the ring gear thing is now manifesting itself as a starting issue when it's warm, but has cooled off some.

Looking at either a 12lb sfi approved steel replacement, or an exedy pro kit clutch and OEM style replacement flywheel

Mustang guys reuse clutches all the time, lots of ppl say it's bad practice but I don't see the threads where ppl say they regret doing it so take that fwiw...

Are all eBay non sfi approved OEM style created equal? Lots of no name brands, only ONE I've heard of (luk) and I kinda don't want another ring gear that fails.

Idk if I'm better off paying good money for a flywheel, and reusing my clutch or getting a no name eBay deal w a known reliable clutch. Both seem like gambling but that's my budget. 250 is good, 225 better, and an exedy full kit w oem weight fw @190 seems too good to be true.

Thoughts?
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Old 04-11-2016, 11:12 AM   #18 (permalink)
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I went with an Exedy OEM replacement setup on my stock Z6 build; held perfectly fine and could chirp second gear without trying.
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Old 04-11-2016, 11:26 AM   #19 (permalink)
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Exedy flywheel?
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