G37 7speed transmission reprogram
02-22-2018, 01:11 PM
#2567
Had the update, seems a little better now. Flare is still there sometimes and now occasionally it downshifts a little early. The downshift is kind jerky and it is only at a low speed. Doesnt feel rough just a little sudden.
02-22-2018, 03:06 PM
#2568
This might be the wrong place to ask, but has anyone requested whatever update they have on the newest Q50s and Q60s? It's the same tranny and TCU, they should be able to do it and it might run better.
Additionally, does anyone know of anyone that can just flat-out reflash the TCU with a better logic?
Additionally, does anyone know of anyone that can just flat-out reflash the TCU with a better logic?
02-23-2018, 02:18 PM
#2569
Registered User
I just did a 3x drain and refill on my 13's transmission (at 66,000 miles)on Saturday, and I noticed an immediate difference in the response and shifting behavior of the car. It's much smoother between shifts, but still acts a little sluggish in D. DS clears it up, and shifting manually is much more responsive.
02-23-2018, 02:49 PM
#2570
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Got a quick question if someone can help. I recently bought a 2013 G37 w/60K miles. I've noticed when shifting, there's a bit of hesitation with how I accelerate. Compared to if I accelerate a little faster, it shifts more smoothly.
Is there a way to have the car re-learn my driving method? I know with different cars you can unplug the battery which causes the car to reset some things, so wondering if there's anything like that for this car.
Is there a way to have the car re-learn my driving method? I know with different cars you can unplug the battery which causes the car to reset some things, so wondering if there's anything like that for this car.
02-23-2018, 03:05 PM
#2571
Yes, you flush the system 3x to run all the old fluid out of the lines. It's about $300 but that's cheaper than a new transmission @ 100k miles....
Got a quick question if someone can help. I recently bought a 2013 G37 w/60K miles. I've noticed when shifting, there's a bit of hesitation with how I accelerate. Compared to if I accelerate a little faster, it shifts more smoothly.
Is there a way to have the car re-learn my driving method? I know with different cars you can unplug the battery which causes the car to reset some things, so wondering if there's anything like that for this car.
Is there a way to have the car re-learn my driving method? I know with different cars you can unplug the battery which causes the car to reset some things, so wondering if there's anything like that for this car.
Other than that, clean your throttle bodies and MAF and swap out your differential fluids and transfer case fluids. The 7AT has always had a hitch in its shift. You have to shift about 500 RPMs ahead of time. The only other solution is a tune to increase line pressure.
02-26-2018, 02:27 PM
#2572
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Yes, you flush the system 3x to run all the old fluid out of the lines. It's about $300 but that's cheaper than a new transmission @ 100k miles....
Google search : G37 Idle re-learn procedure. It's a bit of a b1tch to do, might have to make some slight variations (count to 8 Mississippi vs. 10), but that will basically re-set everything throttle related.
Other than that, clean your throttle bodies and MAF and swap out your differential fluids and transfer case fluids. The 7AT has always had a hitch in its shift. You have to shift about 500 RPMs ahead of time. The only other solution is a tune to increase line pressure.
Google search : G37 Idle re-learn procedure. It's a bit of a b1tch to do, might have to make some slight variations (count to 8 Mississippi vs. 10), but that will basically re-set everything throttle related.
Other than that, clean your throttle bodies and MAF and swap out your differential fluids and transfer case fluids. The 7AT has always had a hitch in its shift. You have to shift about 500 RPMs ahead of time. The only other solution is a tune to increase line pressure.
02-26-2018, 02:39 PM
#2573
Yes I did this myself. I used the link in the DIY section on draining and refilling the transmission, and I made my own fluid pump based on a garden sprayer. This is also in the DIY section of the forum. I bought a 1/4" hose barb off of Ebay that threads into the transmission fill plug, so it was very easy to do. I used 3 gallons of ATF to do it, I think total cost including fluid and the pump was around $120. I noticed an immediate improvement. I used Valvoline Max Life ATF that is Nissan Matic-S compatible, it's like $18/gallon at walmart.
03-02-2018, 11:04 AM
#2575
Yes, you flush the system 3x to run all the old fluid out of the lines. It's about $300 but that's cheaper than a new transmission @ 100k miles....
Google search : G37 Idle re-learn procedure. It's a bit of a b1tch to do, might have to make some slight variations (count to 8 Mississippi vs. 10), but that will basically re-set everything throttle related.
Other than that, clean your throttle bodies and MAF and swap out your differential fluids and transfer case fluids. The 7AT has always had a hitch in its shift. You have to shift about 500 RPMs ahead of time. The only other solution is a tune to increase line pressure.
Google search : G37 Idle re-learn procedure. It's a bit of a b1tch to do, might have to make some slight variations (count to 8 Mississippi vs. 10), but that will basically re-set everything throttle related.
Other than that, clean your throttle bodies and MAF and swap out your differential fluids and transfer case fluids. The 7AT has always had a hitch in its shift. You have to shift about 500 RPMs ahead of time. The only other solution is a tune to increase line pressure.
03-02-2018, 12:02 PM
#2576
It's always been an aggressive transmission. The car is notorious for rough shifting until 5-6 & 6-7 - the overdrive gears; Probably how they get the 7AT to run the 1/4 at the same pace as the 6MT. Mine does the same thing and has been since 30k miles.
Unless you're hearing grinding or RPMS are going up while speed is decreasing, your transmission is probably fine.
Unless you're hearing grinding or RPMS are going up while speed is decreasing, your transmission is probably fine.
03-02-2018, 12:34 PM
#2577
It's always been an aggressive transmission. The car is notorious for rough shifting until 5-6 & 6-7 - the overdrive gears; Probably how they get the 7AT to run the 1/4 at the same pace as the 6MT. Mine does the same thing and has been since 30k miles.
Unless you're hearing grinding or RPMS are going up while speed is decreasing, your transmission is probably fine.
Unless you're hearing grinding or RPMS are going up while speed is decreasing, your transmission is probably fine.
03-15-2018, 05:10 PM
#2579
do you notice that car seems to holds gears longer or cruise at higher rpms? Ever since update I have noticed that half the time I am cruising to around 30mph, somtimes the rpms just sit at around 1800k - 2000k and doesnt upshift. I think I am in 4th or 5th. I could be wrong about the gear. I think the car cruises at higher rpms now but still somtimes will drive like it use to. Doesnt bother me at all just want to make sure everything is okay. My throttle bodies need to be cleaned so that may have an effect. Somtimes though the car will upshift to a higher gear in this senerio. No loss of power and if I gas it over 2k rpms it upshifts fine. Is this normal? Could it be something with how the transmission adapts? Somtimes the car will upshift to a high gear,anf,my rpms will be low in this senerio. Seems to act like this when I drive hard. Thanks
Last edited by justinc7100; 03-15-2018 at 05:16 PM.
03-16-2018, 03:44 AM
#2580
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Got a quick question if someone can help. I recently bought a 2013 G37 w/60K miles. I've noticed when shifting, there's a bit of hesitation with how I accelerate. Compared to if I accelerate a little faster, it shifts more smoothly.
Is there a way to have the car re-learn my driving method? I know with different cars you can unplug the battery which causes the car to reset some things, so wondering if there's anything like that for this car.
Is there a way to have the car re-learn my driving method? I know with different cars you can unplug the battery which causes the car to reset some things, so wondering if there's anything like that for this car.