Vehicles With an Automatic Transmission May Experience a Harsh Downshift From 4th to 3rd Gear on Infiniti G37

Problem Description and Possible Solution

Vehicles with a 7 speed automatic transmission may experience a harsh downshift from 4th to 3rd gear on deceleration. Our technicians tell us revised control module software is available to correct this concern. On higher mileage vehicles other faults may cause transmission shifting issues. Whenever a transmission repair is performed, the control module should be checked for the latest software and updated if necessary.

Problem Data
RepairPal Verified
Average mileage: 52,722 (15,000–113,000)
Drive Train affected: Automatic Transmission
4 model years affected: 2009, 2010, 2011, 2013
24 people reported this problem
Viewing 1 - 12 of 12 comments
It especially happens during colder weather but for example when coming to a stop at a stop sign...there is a lag in downshifting. When accelerating from stop, it doesn't kick into gear right away and after already pressing down on accelerator, it jumps. This car has been nothing but trouble in that regard. Went to dealer, who said it needed reprogramming, the next day it started again! Avoid this car if your buying used!!
Not fixed, happens occasionally when I slow quickly and engine seems to over rev then suddenly down shift. Almost feels like car trying to use engine to slow down vs. brakes.
I have 2009 g37 7at and on 30/20 it downshift pretty hard but going 50 or over its fine it's just when it reach to 30/20 it jerks.
7 speed AT paddle shift G37S sedan. Car in shop with complete transmission failure. Paddle shifted to 4th decelerating on highway in the process of changing lanes to a slower lane. Stepped on the gas pedal and the best way to describe it is "dead" pedal feel. Could not accelerate above 60 mph. Manual shifting or using paddle shift to shift up/down did absolutely nothing.. car would not shift at all. Exited off highway, put it neutral on off ramp and came to stop. Prayed that car would not stall after putting back into "D" thankfully it did not. Down side only had 1st, 2nd, and 3rd gears. Called Infiniti dealer and traversed through city traffic and dropped car off. Got a call later in the day.. complete automatic transmission valve assembly needs replacement.
Prior to this failure, car surged on up shifts and delayed with incredibly high revs on downshifts whether using paddle shift in D or M.
I have the same problem. And have been told there is no problem, and if there is it is not listed on test ran
7 AT Transmission issues, I am not happy with the product at all. 2013 G 37 X S model with less than a year and issues with transmission.
harsh downshifts, car hesitates on acceleration after coasting, has had transmission software update