ry317

Okay, I need to jump in this thread. I am going through the same round of issues. Almost all of the same symptoms as described above, and what made me think of this thread is I let a friend of mine drive the car tonight and he was asking what was wrong with the transmission.

The car just shifts really slow. I have noticed that for some reason the car seems to change gears FASTER in D mode! Example, floor it in D, the car chirps the tires going into second gear. In DS, it never does. There is a definite lag when shifting.

I have not tried turning VDC off, but I will give it a run tomorrow.

ozzypriest

iTrader: (2)

shoot, what is up with the Journey transmission tune? The S package is apparently tuned much more aggressively - I have never had the hint of a chirp in my Journey on any gear change.

I totally regret not getting the S package!

Mike S.

Bahh...different cars different roads. The 7AT in your journey is the SAME as my "xS".

Mike P

iTrader: (1)

S package does not add much to X. Mostly cosmetic. The paddles will assit with the chirp, but so will the manual shift in DS. The S gives you bigger brakes in the RWD version not in the X version. I like it, but I think my car will do almost anything that the others will unless I can get better times since I will have the paddels. Purely hypothetical.

ry317

It will ONLY do it in D mode, never in DS, or with the shifters.

Alex57r

My Xs chirps as long as it is not too hot out and I am alone in the car with the vdc off in either D or DS mode.

G35Rhino

You know you've got problems when your Lexus SUV-driving wife drives your car and asks "what's wrong with your car". My wife did, unprompted and with no knowledge of my posts or issues (last thing I want to hear is her opinion...to further stress me out). She's driven my car a handful of times since January, this was the first time since the flash in early July.

Also, mine is an "S" and it won't chirp anything, anytime (unless VDC is off) and still do not believe it will chirp 2nd. Someone made a comment about chirping...thought I'd add my 2 cents.

ufo

iTrader: (4)

I have experienced this same problem with my G37S 5AT coupe. I tried the grounding kit, and just imho it did not make any noticeable difference. In my case I have hi-flow bolt on mods (CAI, HFCs, exhaust) so I wonder if this might effect vacuum when the throttle is suddenly wide open (when you floor it), thereby causing some delay in the downshift. I have no evidence for this, just speculating. My subjective take is that the car was more responsive from stop or low speed before any mods. I have Cobb Access re-flash, and I'm not sure if that changes anything in the shift points. Don't know if this really adds to the discussion but I'm glad it's not just me.

ry317

My car gives a nice little chirp of the tires when going into 2nd when I hammer the gas. In fact, when I test drove the car that car did it as well. One of the things that really impressed me.

Took the car for a ride today and turned VDC off, it does not make that big of a difference, the shift lag is still there.

I'm going to stop by my dealer tomorrow and see if they have anything to say, and, if they can figure out what is making this random metallic clicking sound I hear every time the car starts moving or comes to a stop. (completely different issue).

G35Rhino

Let me (us) know what, if any, feedback the dealer gives on the lag issue. Thanks Ry...

ozzypriest

iTrader: (2)

You guys definitely have a different transmission tune than the Journey does. On a side topic, I still can't find anybody who will do a transmission tune for the G37 7AT....anybody know anything?

ozzypriest

iTrader: (2)

Yes, and apologize for going OT - I'd love an update on the shift lag/throttle lag. Btw, the S is not cosmetic - you get a noticeably stiffer suspension (better handling), a limited slip differential (very big deal for laying power to the ground, and on track day), and even better brakes, and better wheels/tires. I'd lay $$ on the LSD's abilities to add a couple of tenths of a second to the 0-60's. And it looks like you guys get a more aggressive transmission tune, with less torque management, and a little more shift pressure.

ry317

Sounds accurate, I drove a non S when I bought the car it it did not feel as aggressive.

KLB

Mike was speaking of the xS. On the xS the S is mostly cosmetic. For the non-X you get all the goodies.

ozzypriest

iTrader: (2)

I see - right - no LSD for 4x. Probably still a more agressive tranny tune.