IMTASE

Infiniti has finally released a reprogram for the G37 7-speed transmission. The bulletin has been designated as ITB10-075 and covers 2009-2011 G37 and the 2011 G25.

danno62

Exactly what does the reflashing do in this instance?

Legz

iTrader: (1)

Is this for the rough down shift issue? I thought there was a TSB on that a year back already?

IMTASE

This reprogram will reduce the severity of engine braking during decel, reduce the severity of the 2>1 down shift, reduce the amount of flare during the 3>4 and the 4>5 upshift and reduce the shudder/vibration that some feel during light acceleration.
It will also address certain transmission dtc's.

IMTASE

This was just released. The original reprogram was for early production G37's.

Legz

iTrader: (1)

Do you have a hard copy of the TSB? Would be good to compare with the one that was released last year.

IMTASE

The earlier ITB, ITB09-032b only applies to 2009 model year G37, FX35/50 and
M35 (rwd) and only addresses the 4>3 downshift.

HappyG

Does that mean if I bring it in and request the dealer to perform ITB10-075, they are required to do it?

IMTASE

They best way is to explain to the service advisor the transmission seems to downshift harsh. Then they can reprogram it.

TheIvoryG

iTrader: (3)

This. But if you don't feel like you are having any transmission issues, don't get it done. I feel like too many times people just want TSBs done. If you are having hard shift issues, and you bring it in and explain that, they will perform the TSB without you bringing it up. If you seriously have tranny issues and they don't do it, kindly make them aware of the TSB.

But bringing your car in without tranny issues and wanting a reflash of your tranny isn't really productive.

IMTASE

That is even better. Most dealers don't appreciate clients that show up with copies of bulletins and demand that it is performed, even when there is no issue or it even applies the thier model year or vin range.
There is also the issue of bulletin remorse. Some reprogramming can change parameters too much and the client is even more unhappy.

awais

iTrader: (4)

Did you get the reflash done. How does the transmission response now?

tristan1334

Would like to hear updates from people after the reflash.

HappyG

My G is not as smooth as it should be especially at about 40 MPH. Gear change at that speed is rough sometimes, but sometimes not depending on if I gas it enough or not. In addition, sometimes it lag when I need to accelerate...it respond after a second which could be dangerous if I need to get out of trouble.

Just based on reading from this forum, I assume a lot of G owners are having tranny issues one way or the other.

Falcons023

I did observe some harsh downshifts and upshifts at lower gears. Especially around 40mph. I have an appointment for oil change tomorrow morning...shall i mention about this to the service advisor or wait until we get more info on this bulletin?