What's wrong with the 6MT?

wstar · 08-28-2009, 04:03 PM

Adding more thoughts to the above: this is probably why I find it hard to put/keep the accel pedal on the "neutral torque" spot for a given gear/speed at times (as in, just the right amount of gas to neither accelerate nor decelerate). Eventually you settle in anyways, by landing slightly high or low and then letting the car's speed adjust until that neutral torque point is achieved. At low revs you'd hardly notice (like attaining a cruising speed in top gear), but at high revs I notice it a lot (like when you accelerate up a gear hard, then want to hold neutral torque for a few seconds there before engine braking back through the same gear).

!xoible · 08-28-2009, 04:11 PM

isnt there a spring you put on the clutch pedal to make it lighter/heavier based on what you want?

jmlenz · 08-28-2009, 07:02 PM

heavy clutch? compared to a civic maybe. This 6MT is a nice piece...great clutch weight/engagement, positive short throws, no slop, a hair notchy but very accurate. Only trans Ive encountered that makes this gearbox seem inferior is the sublime S2k 6MT...that maybe the worlds greatest though...

!xoible · 08-28-2009, 07:12 PM

lol it's funny... i guess i have different perception. i consider heavy clutches good, dont care too much about light ones. i have very mixed feelings about my clutch, all i can say is it's the weirdest clutch i've driven.

one thing i love about nissan's 6MT is the proper spacing between gates, it's so natural for me, i never mis-shift.

mcphelps · 08-28-2009, 08:33 PM

Edmund's long term test car had to have the tranny replaced, so now, of course, it's a problem area.

2009 Nissan 370Z: Stuck in Gear | Long-Term Road Tests Blog on Edmunds' Inside Line
2009 Nissan 370Z: Transmission Replacement | Long-Term Road Tests Blog on Edmunds' Inside Line

alan93rsa · 08-28-2009, 09:46 PM

I think Nissan's SRM combined with the Cayman S trans would be a winner.

antennahead · 08-28-2009, 11:07 PM

Quote:

Originally Posted by wstar

Adding more thoughts to the above: this is probably why I find it hard to put/keep the accel pedal on the "neutral torque" spot for a given gear/speed at times (as in, just the right amount of gas to neither accelerate nor decelerate). Eventually you settle in anyways, by landing slightly high or low and then letting the car's speed adjust until that neutral torque point is achieved. At low revs you'd hardly notice (like attaining a cruising speed in top gear), but at high revs I notice it a lot (like when you accelerate up a gear hard, then want to hold neutral torque for a few seconds there before engine braking back through the same gear).

I hear ya wstar, this is a minor annoyance to me as well especially "(like when you accelerate up a gear hard, then want to hold neutral torque for a few seconds there before engine braking back through the same gear)". But in the scope of things, it really is minor.

John

pulpz · 08-29-2009, 08:56 AM

Quote:

Originally Posted by !xoible

isnt there a spring you put on the clutch pedal to make it lighter/heavier based on what you want?

Yes, on the 350Z forums I believe there are few threads on how to adjust more to your preference.

pulpz · 08-29-2009, 08:58 AM

Quote:

Originally Posted by !xoible

lol it's funny... i guess i have different perception. i consider heavy clutches good, dont care too much about light ones. i have very mixed feelings about my clutch, all i can say is it's the weirdest clutch i've driven.

one thing i love about nissan's 6MT is the proper spacing between gates, it's so natural for me, i never mis-shift.

I prefer the heavy clutch feel, give the car a more ballsy character. Everyone has there preference.

Don't like the light accelerator

spearfish25 · 08-29-2009, 10:35 AM

If you want to smooth out the shifts more, replace your transmission fluid with Redline. I posted a DIY and found my shifts, especially when cold, were noticeably smoother.

1slow370 · 08-29-2009, 08:01 PM

I found with mine that it shifts beautifully with 2 exceptions but they probably made mine wrong: 1-2 upshift at 6500+ has about a 10% failure rate (some bad synchro noise and a sick feeling in my stomach) and a skip shift from 3-6 coming off on ramps balls out to cruising speed just doesn't go in 2% (no noise or anything but then it becomes very difficult to get it in any gear without both hands but then once it drops into gear it's fine again). If they weren't only from high rpms i would complain to a dealership but right now with nissan the way it is that is pure voidage FTMFL. Gonna try redline see if that helps.

08-28-2009, 04:03 PM	#31 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3594	Adding more thoughts to the above: this is probably why I find it hard to put/keep the accel pedal on the "neutral torque" spot for a given gear/speed at times (as in, just the right amount of gas to neither accelerate nor decelerate). Eventually you settle in anyways, by landing slightly high or low and then letting the car's speed adjust until that neutral torque point is achieved. At low revs you'd hardly notice (like attaining a cruising speed in top gear), but at high revs I notice it a lot (like when you accelerate up a gear hard, then want to hold neutral torque for a few seconds there before engine braking back through the same gear). __________________ 7AT Track Car! Journal thread / Car setup details

08-28-2009, 04:11 PM	#32 (permalink)
!xoible Base Member Join Date: Feb 2009 Location: west Posts: 245 Drives: some car Rep Power: 185	isnt there a spring you put on the clutch pedal to make it lighter/heavier based on what you want? __________________ welcome to the internet. now ur out of ur ***** mind if you get offended at this ** ^^^

08-28-2009, 07:12 PM	#34 (permalink)
!xoible Base Member Join Date: Feb 2009 Location: west Posts: 245 Drives: some car Rep Power: 185	lol it's funny... i guess i have different perception. i consider heavy clutches good, dont care too much about light ones. i have very mixed feelings about my clutch, all i can say is it's the weirdest clutch i've driven. one thing i love about nissan's 6MT is the proper spacing between gates, it's so natural for me, i never mis-shift. __________________ welcome to the internet. now ur out of ur ***** mind if you get offended at this ** ^^^

08-28-2009, 09:46 PM	#36 (permalink)
alan93rsa Enthusiast Member Join Date: Feb 2009 Location: Ohio Posts: 412 Drives: 16 Cayman GT4 Red Rep Power: 220	I think Nissan's SRM combined with the Cayman S trans would be a winner. __________________ 16 Cayman GT4, Carmine Red, Buckets, PCCB etc.

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08-28-2009, 07:02 PM	#33 (permalink)
jmlenz Track Member Join Date: May 2009 Location: San Diego Posts: 645 Drives: a car Rep Power: 643	heavy clutch? compared to a civic maybe. This 6MT is a nice piece...great clutch weight/engagement, positive short throws, no slop, a hair notchy but very accurate. Only trans Ive encountered that makes this gearbox seem inferior is the sublime S2k 6MT...that maybe the worlds greatest though...

08-28-2009, 08:33 PM	#35 (permalink)
mcphelps Base Member Join Date: Mar 2009 Location: Tucson, AZ Age: 66 Posts: 113 Drives: 09 Sprt/Tr/Nav PG M6 Rep Power: 16	Edmund's long term test car had to have the tranny replaced, so now, of course, it's a problem area. 2009 Nissan 370Z: Stuck in Gear \| Long-Term Road Tests Blog on Edmunds' Inside Line 2009 Nissan 370Z: Transmission Replacement \| Long-Term Road Tests Blog on Edmunds' Inside Line

08-29-2009, 10:35 AM	#40 (permalink)
spearfish25 A True Z Fanatic Join Date: Mar 2009 Location: Naples, FL Posts: 4,117 Drives: to work Rep Power: 1856	If you want to smooth out the shifts more, replace your transmission fluid with Redline. I posted a DIY and found my shifts, especially when cold, were noticeably smoother.

08-29-2009, 08:01 PM	#41 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7251	I found with mine that it shifts beautifully with 2 exceptions but they probably made mine wrong: 1-2 upshift at 6500+ has about a 10% failure rate (some bad synchro noise and a sick feeling in my stomach) and a skip shift from 3-6 coming off on ramps balls out to cruising speed just doesn't go in 2% (no noise or anything but then it becomes very difficult to get it in any gear without both hands but then once it drops into gear it's fine again). If they weren't only from high rpms i would complain to a dealership but right now with nissan the way it is that is pure voidage FTMFL. Gonna try redline see if that helps.