The G-spot

[MX793]

My brother's Dakota did that (and it was apparently a common problem with those).  Turned out there were some bands in the transmission that needed to be tightened.

[Laconian]

FYA, I can fix it how I want.

I'll mention that to the stealership.

[Eye of the Tiger]

I can't believe transmissions use bands anymore. so antiquated.

[MX793]

I can't believe transmissions use bands anymore. so antiquated.

Well, his Dakota was a 2000 model and wasn't exactly running cutting edge hardware for the time (still a 4AT).  I would expect a G37 to be running something more sophisticated.

[Laconian]

I know the G37 has some goofy clutches that can slip the engine's inputs to completely variable degrees.

[Raza]

Yes, but only when the engine's cold. It's usually preceded by an odd +500rpm flare in RPMs w/o any surge in acceleration.

Whirrrrrrr-*hard shift*

It happens about once a week.

Kind of sounds like my clutch did before I had it replaced, but that's probably not the issue with your automatic cabriolet. 

[GoCougs]

The core of today's AT is pretty much the same since the first "modern" retail torque converter AT debuted in 1956 (Chrysler TorqueFlite)- to this day they still use bands and clutches and fluid and a pump...

[Soup DeVille]

Since it is obvious nobody here knows how transmissions work, let me just inform you that they are showing classic signs of about to catch fire and explode into a thousand pieces while you are driving down the road.

Really? sounds like a sticky solenoid to me...

[3.0L V6]

The core of today's AT is pretty much the same since the first "modern" retail torque converter AT debuted in 1956 (Chrysler TorqueFlite)- to this day they still use bands and clutches and fluid and a pump...

Most newer transmissions have eliminated bands.

[GoCougs]

Most newer transmissions have eliminated bands.

Are you sure? The recent new cars I've driven, including my G, definitely feel like they have bands just judging from how they shift (esp. my G)...

[Laconian]

Arg, my rotors are making that sk-sk-sk-sk sound again. I think the rotors are FUBAR.

[afty]

Mine are definitely warped. Will replace them when the pads go.

[Eye of the Tiger]

Arg, my rotors are making that sk-sk-sk-sk sound again. I think the rotors are FUBAR.

WD-40 will get rid of that noise.

[SVT666]

My front rotors are warped too.

[FoMoJo]

Unequally torqued wheel nuts can cause rotor bending problems in some vehicles. 

[Laconian]

It seems to be endemic to G37s.

[MX793]

It seems to be endemic to G37s.

It's endemic of practically every car.  Seems 90% of "mechanics" these days simply drive the lugs on with an impact wrench and don't go through with a torque wrench to ensure they are all torqued equally and to the correct amount.  Any time my car goes into the shop and they take a wheel off for any reason (they will pull one front and one rear for an annual safety inspection to look at the brakes), I always re-torque my lugs as soon as I get home.  If you forget, sometimes you can get the rotor to straighten out if you re-torque as soon as you start noticing pulsing, though once it goes too far they can't be saved.

[Soup DeVille]

Unequally torqued wheel nuts can cause rotor bending problems in some vehicles. 

I've heard that time and again, but its never made any sense to me. The rotor hat is sandwiched in between the hub and the wheel How does unequal torque cause the rotor to bend without also affecting either the hub or the wheel?

[GoCougs]

No problem with my brakes. I also have a hard time believe heat warping too - that is a LOT of heat to cause that much metal to war.

In other news, during our brief snow stint I smacked a hidden curb with the right rear wheel doing some sliding. Buggered it pretty good but didn't damage it or the car. Local place can fix for $185.

[GoCougs]

This just in: the G37 will live on as the Q40 for MYs 2015-2017.

No surprise. The Q50 has been a sales disaster (50% below the 2013 G37 thus far). Infiniti is absolutely MENTAL for thinking they're going to steal S4/335i/ATS customers at the ~$50k price point.

One would think they would have learned from the disaster that were the Q and M redesigns. Shame. I had high hopes for the Q50 given how disappointing the rest of the class's redesigns have been.

[afty]

In MY 2017 the G design will be 10 years old.  I can't believe Infiniti screwed up the Q50 so badly that they need to keep selling the old design to stay afloat.

[MX793]

Not the first time Nissan botched a redesign and continued selling the old generation alongside the new.  In Japan, when they brought out the S14 generation of the Silvia (our 240SX) in '94, they continued selling a variant of the previous S13 generation through the entire run of the S14 until they came out with the S15 in '99.

[Madman]

That could also be why Nissan is hedging its bets by selling the old Rogue along side the new one, even though the old one wasn't all that great in the first place.

[ifcar]

This just in: the G37 will live on as the Q40 for MYs 2015-2017.

No surprise. The Q50 has been a sales disaster (50% below the 2013 G37 thus far). Infiniti is absolutely MENTAL for thinking they're going to steal S4/335i/ATS customers at the ~$50k price point.

One would think they would have learned from the disaster that were the Q and M redesigns. Shame. I had high hopes for the Q50 given how disappointing the rest of the class's redesigns have been.

It had a slow start, but the last two months of Q50 sales have been very strong, despite the internal competition from the old G. Both November and December outpaced the previous year's G sales in addition to *this year's* G sales.

The only time Q50 numbers have been as low as you say was its very first month on the market, unless you're comparing YTD '13 of the two cars when the Q50 only launched in August.

[SVT666]

To me, the Q50 looks like a Hyundai.  It doesn't have an upscale look to it, and even though the G does look somewhat dated now, it's still a very handsome car and has an upscale look to it the Q is missing.

[GoCougs]

It had a slow start, but the last two months of Q50 sales have been very strong, despite the internal competition from the old G. Both November and December outpaced the previous year's G sales in addition to *this year's* G sales.

The only time Q50 numbers have been as low as you say was its very first month on the market, unless you're comparing YTD '13 of the two cars when the Q50 only launched in August.

The first three months were way low WRT the G37 sales months of last year, and only about tied for the last two months, and IMO the orders and feedback from the dealers is not good, compelling the goofy move to rebrand and keep selling the G37.

[ifcar]

The first three months were way low WRT the G37 sales months of last year, and only about tied for the last two months, and IMO the orders and feedback from the dealers is not good, compelling the goofy move to rebrand and keep selling the G37.

While mostly true (though an exaggeration -- November's Q50 figures, if not December's, were way above the November '12 sales for the G), this isn't what you said earlier. Your opinions about dealer orders notwithstanding.

[GoCougs]

I'm okay with the Q50's styling - IMO it works quite well with the 19" sport wheels. I do prefer the G37's curvaceous on-its-hunches styling though. The Q50's lack of advancement in the power train (esp. the AT), the goofy touch screens and tech overload is a total deal breaker for me though. I'd definitely rather roll the dice on an S4 or 335i, and am eagerly awaiting the TLX details (but expect to be disappointed there as well).

[GoCougs]

While mostly true (though an exaggeration -- November's Q50 figures, if not December's, were way above the November '12 sales for the G), this isn't what you said earlier. Your opinions about dealer orders notwithstanding.

November's were up but December's were down (5891 vs. 4838, 5516 vs. 4568). The Q50 was down ~46% its first three months vs. the G37 last year, but true, has gained a bit, but is still down ~25% its first five months. Considering the market has grown notably since a year ago, I'm sure the market share numbers are even worse.

[ifcar]

November's were up but December's were down (5891 vs. 4838, 5516 vs. 4568). The Q50 was down ~46% its first three months vs. the G37 last year, but true, has gained a bit, but is still down ~25% its first five months. Considering the market has grown notably since a year ago, I'm sure the market share numbers are even worse.

December is 4,568 (Q50, 2013) vs. 4,482 (G, 2012).

http://nissannews.com/en-US/nissan/usa/releases/nissan-group-reports-december-and-2013-year-end-u-s-sales

Market share numbers would need to be for Infiniti's presence in the segment overall, which includes the continuing G sales. If you sell two cars in the same segment, each one alone is bound to be less.