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.
Average mileage: 52,722 (15,000–113,000)
Drive Train affected: Automatic Transmission
22 people reported this problem
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!!
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.
harsh downshifts, car hesitates on acceleration after coasting, has had transmission software update