jnx

So, did that prevent you from buying?

YA911Fan

I'd prefer that my German sports car had even more engineering and manufacturing help from the Japanese. Then it would have far better build quality and wouldn't be riddled with endless buzzes, resonances, etc.

Maybe the rear main seal would even be installed correctly.

kauai_diver

I wish the RMS was built in Japan

sonny1

Usually 2nd gear synchro problems, they can't handle a sudden shift from 4th to 2nd on high revs., so if you shift from 4th to 2nd say at 5K rpm's you will have synchro issues, regards, Sonny.

MrBonus

Why?

dstrimbu

If you shift from 4th to 2nd at 5K, you're going to have engine problems, Sonny... the synchros will be the least of your worries. <g>

sonny1

Not the case, I have already replaced two 997 trannys with this syndrome, eg./when the customer takes the car for warranty they check the rpm's logged on the computer, and shows excess rpm's they won't warrant the trans., amazingly the engine will cope with the rpm's and not the trans., this is real. The problem is that there is no parts available yet for the Aisin tranny,(not so with the Getrag units found on earlier cars) so it has to be replaced.,cheers, Sonny.

ps./I have taken both trannys apart, both with really bad synchros.

camsoccer

What exactly determines excessive rpm’s and why does it matter wrt your transmission being replaced?

Le Chef

This is such narrow-minded jingoistic tosh. Who gives a monkey's f*ck where the stuff comes from as long as it works 100%. Porsche is a global company and they buy the best for the job wherever that happens to be designed or made. You can't afford to narrow down your choices based on nationalistic stereotypes - that's just stupid business.

abe

Le Chef, you are correct untill the point comes when quality is sacrificed. In 1997 I bought an E420 and the lights in the instrument panels kept burning out...normaly not an item that Mercedes wanted to cover except they knew they had a problem since these new halogen lights were purchased in CHINA.
I am for a global company as long as the end result is a better product. That said I am partial to the German transmissions...nothing to do with "nationalistic stereotypes". Japanese companies are outsourcing just like we are...can you imagine your transmission made in China?

Le Chef

That's a Mercedes problem - these days sadly known for poor quality control - not a Chinese problem. You;re still confusing jingoism with business economics. Shame on Mercedes if they haven't figured out after over 100 years of making vehicles how to manage their suppliers properly.

texas911

Sonny, which is it? Over-revving? You state in one post that the synchros go bad at the 4-2 downshift at 5k rpm, hardly an over-rev situatioin, then you say that the dealer checks for over rev, and that causes the tranny to go bad.

sonny1

Downshifting from high rpm's to a more lower than usual gear, the engine will take lots of abuse, not the same for the tranny, upshifting is ok for the tranny at any rpm's, it seems that the 2nd. gear synchros don't like the sudden high load that happens if you miss a downshift at high rpm's, note, I have only seen this on 2nd. gear, it might happen on third but I haven't see it yet, Sonny.