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914World.com _ 914World Garage _ Syncro Rings

Posted by: tracks914 Jan 10 2005, 08:34 PM

I need to put a couple of syncro rings in my tranny. (1st and 2nd) They look pretty simple but whats the scoop on them? Why would a brass ring with a notch cost so much to make?
I am a machinist and can make my own pretty easily if I had the specs on new ones, but is it the material that they are made of that makes them so expensive? Are they bronze or brass or what?

Posted by: SpecialK Jan 11 2005, 03:17 AM

Not sure of the material, but the Haynes indicates that they're Molybdenum coated. New O.D. is shown as 76.12 mm to 76.48 mm.

If this doesn't help, at least you're bumped up so a real P-car mechanic can hook you up with more detailed info. IPB Image

Posted by: MattR Jan 11 2005, 03:49 AM

High precision? 60 bucks doesnt seem too bad for a high precision brass/bronze short run piece. Its not like 300 bucks for a set of main bearings for a 912...

Posted by: James Adams Jan 11 2005, 06:48 AM

The syncro rings are steel with the afore mentioned molybdenum coating on the outer surface.

Posted by: tracks914 Jan 11 2005, 06:31 PM

QUOTE (James Adams @ Jan 11 2005, 04:48 AM)
The syncro rings are steel with the afore mentioned molybdenum coating on the outer surface.

Are they all this composition? I have seen a variation in the price from $50 from "blondde" formerly "partwerks" on ebay to $80 in all the online P catalogues.

Posted by: Dr Evil Jan 11 2005, 06:37 PM

Not too long ago they were $20-25 a piece. It is all about market demand/supply. The exterior coating must be rough as well.

Posted by: bondo Jan 11 2005, 06:40 PM

Hey Mike, what's the best way to tell good used syncros from bad ones? I have some that are obviously good, and others that are obviosuly bad.. then I have some with a slight groove on one side, and some with no groove but some random pitting.

Posted by: Dr Evil Jan 11 2005, 06:46 PM

I would have to see them. As long as one side is rough it should be useable. The #1 way to tell that they are spent is that they are smooth. They can't entice the slider to spin up if they are not rough.

Posted by: bondo Jan 11 2005, 06:57 PM

Cool, that should help exclude a few more.. I'll bring any remaining questionable ones to the next D&G.

Posted by: Red-Beard Jan 11 2005, 07:09 PM

I'm wondering if the "source" of the previous cheap synch bands was mexico. The price increase occured about the time they stopped producing Beetles.

James

Posted by: tracks914 Jan 11 2005, 09:10 PM

So what is your take on these, http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=7945731166&rd=1&sspagename=STRK%3AMEWA%3AIT are they worth the $50 or should I buy the ones from PP or Tweeks (Mid America Motorworks) for $80?

Posted by: scott thacher Jan 11 2005, 09:18 PM

that is not a syncro that fits a 901 tranny, it looks more like a piston ring

Posted by: Red-Beard Jan 11 2005, 09:18 PM

From my understanding, they are coming from Germany now, and are probably NOS.

Posted by: Dave_Darling Jan 11 2005, 09:21 PM

QUOTE (Red-Beard @ Jan 11 2005, 05:09 PM)
I'm wondering if the "source" of the previous cheap synch bands was mexico.

I heard (don't remember where from, sorry!) that Porsche came down on an aftermarket manufacturer of the synchro rings a couple of years ago, and got them to stop producing 901-type synchro rings. (Possibly other stuff as well.) Supply & demand took over, and the prices quickly doubled to about $50 each. (They've since climbed even more, obviously...)

No idea if the story is true or not.

--DD

Posted by: scott thacher Jan 11 2005, 09:24 PM

http://www.pelicanparts.com/914/Parts/Transmission/synchros_big.htmis the PP parts image of the gear syncro parts diagram. if it helps you to see what they look like

Posted by: Red-Beard Jan 11 2005, 09:29 PM

My cheapest source for a Synch band is....

http://www.paragon-products.com/category_s/206.htm

Posted by: Red-Beard Jan 11 2005, 09:50 PM

crap...just found one _slightly_ cheaper

http://www.dartauto.com/synchros.html

911-302-301-06 This is the same part for the 914.

Posted by: Russian019 Jan 28 2005, 03:42 PM

I have a bunch for 901. $56 each, 2 or more I will give you for $53 a piece. Shipping will be between 1 and 4 dollars depending on when anyone wants it.

Posted by: Jeff Bonanno Jan 28 2005, 03:58 PM

from top to bottom: trash, junk, hmm, new.

Attached image(s)

Posted by: Russian019 Jan 28 2005, 04:03 PM

Interesting name jeff... any relation? I Know a bonanno descendant in your area... downtown SD.

Posted by: Jeff Bonanno Jan 28 2005, 04:05 PM

distant relation...Howard knows my 'family' better than i do.

downtown? as in "we're takin' you downtown to central booking" ?

IPB Image

ps - i'll be in Bethesda on Feb. 1st. wanna grab a drink?

Posted by: Russian019 Jan 28 2005, 04:12 PM

Yeah, sounds good.

Downtown as in, park on E and take a cab. ha. It's not that bad, just surprised when I went over there. I believe she's a niece of a daughter..... if that makes sence. Sending you a PM....