Is your MN6 .......
Thread Starter
Le Mans Master
Joined: Aug 2001
Posts: 7,064
Likes: 18
From: Arizona
Is your MN6 .......
I have always had problems with the tranny in my car. Its on its 2nd tranny and the syncros have been swapped out 4 times. The car has always been hard to power shift into 2nd gear, but now it grinds alittle too.
Does anyone elses MN6 hard to get into 2nd.
I have a Z06 slave, aluminum flywheel, and spec stage III clutch.
Does anyone elses MN6 hard to get into 2nd.
I have a Z06 slave, aluminum flywheel, and spec stage III clutch.
Le Mans Master
Joined: May 2000
Posts: 6,032
Likes: 124
From: Dallas TX
Re: Is your MN6 ....... (ICULUKN-C5)
I have always had problems with the tranny in my car. Its on its 2nd tranny and the syncros have been swapped out 4 times. The car has always been hard to power shift into 2nd gear, but now it grinds alittle too.
Does anyone elses MN6 hard to get into 2nd.
I have a Z06 slave, aluminum flywheel, and spec stage III clutch.
Does anyone elses MN6 hard to get into 2nd.
I have a Z06 slave, aluminum flywheel, and spec stage III clutch.
Drifting
Joined: Oct 1999
Posts: 1,272
Likes: 0
From: Gaithersburg MD
Cruise-In II Veteran
Cruise-In III Veteran
Re: Is your MN6 ....... (ICULUKN-C5)
While I never had this problem, I am having a problem with 4th gear in the MN12 trans.
When I took it into the dealer, the mechanic was telling me about a Camaro (same trans, T-56) and a Vette, both with bad syncro's in 2nd gear that were then in the shop for repair. He said it was becoming more of a problem.
I have only had stock clutches in my Vettes. I am wondering if some of the aftermarket clutches do not disengage as well as stock causing more wear and tear on the syncro's. I am just speculating, but it seems that most of the 9 and 10 second cars I have seen in person or on videos are NOT powershifted.
When I took it into the dealer, the mechanic was telling me about a Camaro (same trans, T-56) and a Vette, both with bad syncro's in 2nd gear that were then in the shop for repair. He said it was becoming more of a problem.
I have only had stock clutches in my Vettes. I am wondering if some of the aftermarket clutches do not disengage as well as stock causing more wear and tear on the syncro's. I am just speculating, but it seems that most of the 9 and 10 second cars I have seen in person or on videos are NOT powershifted.
Pro
Joined: Jul 2001
Posts: 620
Likes: 0
From: Renton WA
Re: Is your MN6 ....... (ICULUKN-C5)
If I go slow into second, it won't grind, but if I try to shift too fast, it'll grind a little. I'm waiting for it to get bad enough to have it fixed under warranty. I'm sure they wouldn't fix it now.
Thread Starter
Le Mans Master
Joined: Aug 2001
Posts: 7,064
Likes: 18
From: Arizona
Re: Is your MN6 ....... ('99Vetteguy)
If I go slow into second, it won't grind, but if I try to shift too fast, it'll grind a little. I'm waiting for it to get bad enough to have it fixed under warranty. I'm sure they wouldn't fix it now.
Pro
Joined: Jul 2001
Posts: 620
Likes: 0
From: Renton WA
Re: Is your MN6 ....... (ICULUKN-C5)
My engine speed doesn't have anything to do with my little grind issue,
it's simply how fast I try to throw my shifter around. I'd say you've got
a more serious syncro problem than I do.
it's simply how fast I try to throw my shifter around. I'd say you've got
a more serious syncro problem than I do.
Racer
Joined: Sep 2002
Posts: 483
Likes: 0
From: Austin Tx
Re: Is your MN6 ....... (ICULUKN-C5)
what causes syncros to go bad.... This is the 4th time they had to be replaced.
Could you give us a millisecond by millisecond rundown of your technique?
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
5 Best & 5 Worst Corvette Daily Drivers
Joe Kucinski
The Headlights of Every Corvette Generation Explained
Joe Kucinski
5 Best & 5 Most Overrated Corvette Track Packages of All Time!
Joe Kucinski
Every 2027 Corvette Engine Explained
Joe Kucinski
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette
Verdad Gallardo
10 Ugly Corvettes That We Still Kinda Love
Joe Kucinski
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
Thread Starter
Le Mans Master
Joined: Aug 2001
Posts: 7,064
Likes: 18
From: Arizona
Re: Is your MN6 ....... (Mitch Alsup)
The car has 31k on the ticker and has been driven hard its whole life. It grinds going into 2nd but is hard to get into first. I can understand that 2 gear syncro going, but how does the 1st gear syncro go... I rarely engine brake in first...
Drifting
Joined: Sep 2000
Posts: 1,456
Likes: 5
From: Bothell WA
Re: Is your MN6 ....... (ICULUKN-C5)
The synchro's job is to try to match up the turning speed of the 2 gears in the transmission so that when the gears begin to mesh, they are turning at the right speed and don't "grind". I would think that the 2 things that would wear the synchros fastest is the speed of the shift, because it forces the synchros to change speed faster, and the speed difference between the gears. Power shifting is hard for both of these reasons. Normally if you're shifting into a higher gear, you let your foot off the accelerator and the engine speed decreases to help match gear speeds. If you're shifting into a lower gear, good drivers also blip the throttle to help match up gear speeds. (This is something I'm still trying to learn to do well.) This helps the synchros do their job. I agree with others that if you want your transmission to last longer, don't power shift it.
- Mark
- Mark
Thread Starter
Le Mans Master
Joined: Aug 2001
Posts: 7,064
Likes: 18
From: Arizona
Re: Is your MN6 ....... (Mark VerMurlen)
well i decided not to powershift, although I know it will cost me .10 in the 1/4 mile.
Just need to up the nitrous to make up for it...
Just need to up the nitrous to make up for it...