More thoughts on the 7AT from a future buyer...

Mike S. · 12-22-2011, 06:45 PM

Hey guys thanks for all the replys. Glad to hear the 7AT in the Z seems like it's tuned a good bit better than in the Infiniti's! There are so many posts on the G boards it's laughable. One thread has nearly 65,000 views. It can't just be picky owners b/c everyone loves the 5AT that was in the 07-08G's, but lots of complaints 09+.

Does the Z have a DS mode like my G? It seems like it's only D or Manual mode.

azn370z · 12-22-2011, 07:10 PM

The 5 speed and 7 speed are two very different transmissions. Nissan didn't just add two more gears. Read the pdf and check out how they're different.

AlphaSnacks · 12-22-2011, 08:21 PM

Quote:

Originally Posted by azn370z

The 5 speed and 7 speed are two very different transmissions. Nissan didn't just add two more gears. Read the pdf and check out how they're different.

I didn't say Nissan just added two new gears.

Quote:

The 370Z’s new 7-speed automatic with Downshift Rev Matching (DRM) and Adaptive Shift Control (ASC) is designed to offer quick, manual-like shifting when operated in manual mode with a target time of 0.5 seconds between shifts. Drivers can use the standard paddle shifters or the shift lever. With new torque converter lock-up logic, the new 7-speed automatic feels more direct, like a manual transmission. The new 7-speed’s wide gear ratios offer improved fuel efficiency, while the Adaptive Shift Control is designed to adjust to the driver’s driving style.

Most of these things were offered in the 5AT, such as the rev-matching and adaptive shift control after 2006. The only difference was the torque-converter lockup was different in the 5AT. In fact, even their model numbers are almost the same:

Jatco JR507E and Jatco JR710E.

Point being, the 7AT has different gearing ratios to make up for the two new cogs - but much of it remains the same, and was mostly carried over from the previous transmission.

azn370z · 12-22-2011, 09:51 PM

The 350z and 370z have similar names and similar features such as vdc and traction control but the cars are very different with a different engine, platform, automatic transmission, and vdc.

I don't think the 7 speed is the same 5 speed transmission with two more gears and a new torque converter just because they both have down shift rev match and asc. Also, the 7 speed doesn't require fluid change and weighs a bit more than the 5 speed. I think transmissions get completely redesigned to have better performance, durability, and efficiency, just as cars do.

The 5 speed was very slow to shift and the shift time wasn't consistent. I'm guessing this was because the 5 speed wasn't designed from the beginning to shift quickly.

The pictures shows two different transmissions.

AlphaSnacks · 12-23-2011, 12:42 PM

Quote:

Originally Posted by azn370z

The 350z and 370z have similar names and similar features such as vdc and traction control but the cars are very different with a different engine, platform, automatic transmission, and vdc.

I don't think the 7 speed is the same 5 speed transmission with two more gears and a new torque converter just because they both have down shift rev match and asc. Also, the 7 speed doesn't require fluid change and weighs a bit more than the 5 speed. I think transmissions get completely redesigned to have better performance, durability, and efficiency, just as cars do.

The 5 speed was very slow to shift and the shift time wasn't consistent. I'm guessing this was because the 5 speed wasn't designed from the beginning to shift quickly.

The pictures shows two different transmissions.

What are you talking about? First of all, nowhere does it say that the torque converters are different between the two transmissions. You should learn how to read, it says the logic (programming) is different. Whether or not the TCs are different would require a product search to validate - I'm sure there are differences, but I highly doubt they are dramatic. And once again, I didn't say the transmissions are the same with two extra gears in the 7AT. But there is no question that the basis for the 7AT is largely based on the original 5AT. In fact, if you look at Nissan's parts catalog, you will notice critical components like the transmission oil pan have the exact same part number for the 370Z and 2006+ 350Z automatics, as do the oil coolers. Unfortunately, I can't find the part number for the 370Z or G37's TC.

And you're also very wrong about the shift times of the 5AT. It was every bit as fast to shift as the current 7AT. How exactly is the shifting below very slow:

350z 0-90 - YouTube

Have you ever even owned or driven a 5AT 350Z for more than a few days? Because I owned one. And I've driven 7AT 370Zs tons of times, as well.

UNKNOWN_370 · 12-22-2011, 08:12 PM

Quote:

Originally Posted by Mike S.

Hey guys thanks for all the replys. Glad to hear the 7AT in the Z seems like it's tuned a good bit better than in the Infiniti's! There are so many posts on the G boards it's laughable. One thread has nearly 65,000 views. It can't just be picky owners b/c everyone loves the 5AT that was in the 07-08G's, but lots of complaints 09+.

Does the Z have a DS mode like my G? It seems like it's only D or Manual mode.

Did you read my whole post? DS mode is in the car. DS is when you shift while in D. You won't see a little DS sign light up but its there.

Mike S. · 12-22-2011, 09:49 PM

Quote:

Originally Posted by UNKNOWN_370

Did you read my whole post? DS mode is in the car. DS is when you shift while in D. You won't see a little DS sign light up but its there.

That doesn't really sound like a "DS" mode then. The G has 3 Modes. Normal "D", "DS" which will more aggressively upshift and downshift when the gyro sensor is activated and a manual mode.

If you click the paddles in the Z while in normal drive, the D will turn to a number (at least thats what I remember from my test drive). However, that just seems like manual mode....I can't imagine the auto then up and downshifting with no other inputs...it should just revert to D.

azn370z · 12-22-2011, 09:52 PM

Quote:

Originally Posted by Mike S.

That doesn't really sound like a "DS" mode then. The G has 3 Modes. Normal "D", "DS" which will more aggressively upshift and downshift when the gyro sensor is activated and a manual mode.

If you click the paddles in the Z while in normal drive, the D will turn to a number (at least thats what I remember from my test drive). However, that just seems like manual mode....I can't imagine the auto then up and downshifting with no other inputs...it should just revert to D.

The z doesn't have the mode your asking about.

12-22-2011, 07:10 PM	#2 (permalink)
azn370z A True Z Fanatic Join Date: Nov 2008 Location: Seattle Posts: 1,722 Drives: z34 - R1 Rep Power: 491	The 5 speed and 7 speed are two very different transmissions. Nissan didn't just add two more gears. Read the pdf and check out how they're different. __________________ 2010 k23 H&R sport springs / Spc rear camber arms / SSR SP1 / Berk cbe / Varis cf lip / Nismo S-Tune side skirts

12-22-2011, 09:51 PM	#4 (permalink)
azn370z A True Z Fanatic Join Date: Nov 2008 Location: Seattle Posts: 1,722 Drives: z34 - R1 Rep Power: 491	The 350z and 370z have similar names and similar features such as vdc and traction control but the cars are very different with a different engine, platform, automatic transmission, and vdc. I don't think the 7 speed is the same 5 speed transmission with two more gears and a new torque converter just because they both have down shift rev match and asc. Also, the 7 speed doesn't require fluid change and weighs a bit more than the 5 speed. I think transmissions get completely redesigned to have better performance, durability, and efficiency, just as cars do. The 5 speed was very slow to shift and the shift time wasn't consistent. I'm guessing this was because the 5 speed wasn't designed from the beginning to shift quickly. The pictures shows two different transmissions. __________________ 2010 k23 H&R sport springs / Spc rear camber arms / SSR SP1 / Berk cbe / Varis cf lip / Nismo S-Tune side skirts Last edited by azn370z; 12-22-2011 at 10:01 PM.

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12-22-2011, 06:45 PM	#1 (permalink)
Mike S. Base Member Join Date: Aug 2010 Location: Buffalo Posts: 19 Drives: 09 G37xS Rep Power: 16	Hey guys thanks for all the replys. Glad to hear the 7AT in the Z seems like it's tuned a good bit better than in the Infiniti's! There are so many posts on the G boards it's laughable. One thread has nearly 65,000 views. It can't just be picky owners b/c everyone loves the 5AT that was in the 07-08G's, but lots of complaints 09+. Does the Z have a DS mode like my G? It seems like it's only D or Manual mode.