09GMAN wrote:Stupid question from the new guy here, but how can I know if my G37 has the AT shift update? My car was built 09/09, is it a TSB?
There are no stupid questions! Heck, I'm new here too.
Yes, it's ITB09-032b. I downloaded a copy off the infinityhelp.com website, you need to sign up there and you're limited to two downloads a day unless you contribute. I can send you a PDF copy if you give me your email address. I would post a link here to it but don't have a place anywhere to store it online.
It's titled "7 SPEED A/T HARSH 4>3 DOWNSHIFT ON DECELERATION" and dated Sept 28th, 2009, so yours may have the condition as well.
You should be able to tell by driving it. Here's how I knew -
Get up to about 30-40 on a relatively flat road. Take your foot off the gas and coast toward a stop. Around 20-23 MPH, you will feel a more abrupt downshift, it's from 4-3. The RPM will actually go from about 1000 to 2000 when the downshift occurs.
Now that I have the reprogramming, all I notice is a very slight bump in RPM when rolling to a stop, as seen on the tach - it's only about a 100 RPM jump. Before, I could very much feel it and see it on the tach. As I said in another thread, my wife thought I was hitting the brakes too hard or something. She said she liked her Volvo S60 better!