Professional analysis and pictures of our 6MT internals
01-29-2007, 09:51 PM
#41
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Originally Posted by BriGuyMax
We talked about it a bit, but I don't remember in detail what he said. It seems to me that originally they "under snychro'd" the trans by putting at most, double cone synchros on only second and third, and now the lastest revision has triple cone snychros on second and third, and doubles on most of the rest.
IF these doubled syncros are the culprits of 1st, 2-3rd and 5th notchiness/grinding, can they be replaced w/the triple cone synchros?.....
on rare occasions, i can't engage 1st from a dead stop....
+1 pics of snychros, i don't even know what one looks like
i have a g35 sedan 6MT, same trannies correct?
01-30-2007, 12:42 PM
#43
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great post, my tranny has been holding up great, but then again i don't beat it up frequently....anyways....nice to see that they are made rather bulky.
01-31-2007, 04:47 AM
#44
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Great info..can you conclude anything about third gear "breaking the welds" as we had discussed months back from our foreign friends with the fast quarter mile times?
Any visable idea of where the welds break and how it could possibly be re-welded to fix a third gear that is "freely spinning"?
please ask the opinion of your friend's shop
Thanks
TODD
Any visable idea of where the welds break and how it could possibly be re-welded to fix a third gear that is "freely spinning"?
please ask the opinion of your friend's shop
Thanks
TODD
01-31-2007, 11:27 AM
#45
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Originally Posted by 350zDCalb
Great info..can you conclude anything about third gear "breaking the welds" as we had discussed months back from our foreign friends with the fast quarter mile times?
Any visable idea of where the welds break and how it could possibly be re-welded to fix a third gear that is "freely spinning"?
please ask the opinion of your friend's shop
Thanks
TODD
Any visable idea of where the welds break and how it could possibly be re-welded to fix a third gear that is "freely spinning"?
please ask the opinion of your friend's shop
Thanks
TODD
There is absolutely no way this is possible. The gears aren't "welded" in any way and they are one solid piece of steel. I have no idea what those guys are talking about after pulling apart this trans.
BTW - I need to talk with you about my motor build in the next couple days...I want to get moving on this very soon.
01-31-2007, 03:39 PM
#48
Originally Posted by BriGuyMax
Maybe they're talking about the FWD 3000GTs. This was a stock GETRAG trans out of a VR-4 and from what John has seen the VR-4 transmissions are very stout.
01-31-2007, 03:41 PM
#49
Originally Posted by BriGuyMax
Wiki article exerpt taken from 3si.org
EDIT: Thinking about it...sounds weirdly similiar to our synchro problem. I've used Redline MT-90 since this trans had 1000 miles...maybe that's why I haven't had any further synchro issues.
EDIT: Thinking about it...sounds weirdly similiar to our synchro problem. I've used Redline MT-90 since this trans had 1000 miles...maybe that's why I haven't had any further synchro issues.
01-31-2007, 06:11 PM
#54
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briguy I found this on a 3Si board:
But there seems to be mixed feedback around it over all. In the end I guess I would defer to the specialist who works on these all the time.
Originally Posted by 3000GT owner
The biggest problem is the poorly built trans. The car will be on my second rebuild here soon. Be very weary of ANY rough shifting when looking to buy one. The problem with the transmission are twofold one the casing of the trans goes bad and two the gearing also goes bad as well. I bought my 3000gt with a rebuilt trans., but only the gearing was replace. Now I am looking at 1800 to fix the case on the trans.( I will replace w/ a JDM trans for about $600) so just be careful. The gas mileage is dreary- I get about 16 w/ mainly city driving. 19-20 Hwy. The window motors have both gone bad and parts are VERY expensive and getting hard to find. con't below
01-31-2007, 07:10 PM
#56
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Originally Posted by znot
i know nothing of trannies, so a newb question...
IF these doubled syncros are the culprits of 1st, 2-3rd and 5th notchiness/grinding, can they be replaced w/the triple cone synchros?.....
on rare occasions, i can't engage 1st from a dead stop....
+1 pics of snychros, i don't even know what one looks like
i have a g35 sedan 6MT, same trannies correct?
IF these doubled syncros are the culprits of 1st, 2-3rd and 5th notchiness/grinding, can they be replaced w/the triple cone synchros?.....
on rare occasions, i can't engage 1st from a dead stop....
+1 pics of snychros, i don't even know what one looks like
i have a g35 sedan 6MT, same trannies correct?
Don't have any pics of the synchros at this time. I'm about 175mi from the trans right now so I'll try and get my friend to take a few pics of the synchros sometime in the near future.
And yes...the G35 6MT is identical.
01-31-2007, 07:11 PM
#57
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Originally Posted by MIAPLAYA
briguy I found this on a 3Si board:
But there seems to be mixed feedback around it over all. In the end I guess I would defer to the specialist who works on these all the time.
But there seems to be mixed feedback around it over all. In the end I guess I would defer to the specialist who works on these all the time.
Did you read the post I put up about it on the last page?
01-31-2007, 07:13 PM
#58
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Originally Posted by 98sr20ve
NOOB Question:
What is a "008" and how does the info presented her relate to my 2006 G35 6MT transmission.
What is a "008" and how does the info presented her relate to my 2006 G35 6MT transmission.
It's the revision number. There are 10 revisions to this transmission since the 350Z came out in late 2002. The latest is 010...but people have had good success with revision 8 and on.
01-31-2007, 07:24 PM
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Originally Posted by BriGuyMax
Did you read the post I put up about it on the last page?