Nissan 370Z Forum - More thoughts on the 7AT from a future buyer...

Nissan 370Z Forum (http://www.the370z.com/)

- Nissan 370Z General Discussions (http://www.the370z.com/nissan-370z-general-discussions/)

- - More thoughts on the 7AT from a future buyer... (http://www.the370z.com/nissan-370z-general-discussions/46896-more-thoughts-7at-future-buyer.html)

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.
http://i890.photobucket.com/albums/a...70z/JR710E.jpg
http://i890.photobucket.com/albums/a...70z/JR507E.jpg

Quote:

Originally Posted by Mike S. (Post 1460406)

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.

You're right...just did a bit of research.

Attachment 38520

Quote:

Originally Posted by azn370z (Post 1460411)

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.

Quote:

Originally Posted by Arnold K. (Post 1460209)

my old 350Z, which was a 5AT (they're virtually identiclal in design to the 7AT, aside from gearing)

Yes I've driven both transmissions for more than a few days. If you look at the picture you can clearly see the case and the mechanical parts in the inside are different.

Just because it uses the same oil pan doesn't mean the transmission are the same or very similar. The oil pan is a very simple piece of the car.

Quote:

Originally Posted by AndreDekolta (Post 1458309)

I recently test drove two MT's, one a NISMO, and the other was a Touring w/Sport. Both were awesome. I had absolutely no intention of buying an AT. HOWEVER, about three weeks ago test drove an AT black Touring /w Sport. I was soo impressed with responsiveness that it shook my whole process. Thought and battled over it until last Friday. Went back into the dealer and drove away with the AT.

I think it really depends on what you want to do with the car. I want to drive and enjoy it (and the power). The animal in me wants to shift. The lazy "driver" wants to just stomp on the gas and HOLD ON!

Driving on windy roads with the paddies is a freakin' blast. So it's almost like I have the best of both worlds...sort of.

I don't regret my choice at all. Also have pretty severe arthritus in my knees. That was also always on my mind when making my final choice.

No regrets and loving it!

So why the "MT" in your profile? :)

Quote:

Originally Posted by azn370z (Post 1461089)

I don't care about what a 1 inch picture looks like. You're not thinking logically about this whole situation at all. If oil pans and oil coolers are the same, that means internally and dimensionally the transmission has remained largely untouched with the exception of a ratio change, which involves a different set of cogs, and perhaps some internal component strengthening. Though nowhere in that press release did Nissan mention anything about strengthening the transmission, but they went through great lengths to talk about the changes made to the VQ37.

What you fail to understand is that the 5AT and 7AT bolt right up to the VQ35HR and the VQ37HR without any issues at all -- 2nd gen G35s debuted with the 5AT, then received the 7AT (just like the EX35), while 2nd gen G37 Coupes debuted with the 5AT and then upgraded to the 7AT. That alone shows how similar the transmissions are that Nissan was able to just swap one out for the other 1 or 2 years later, and then continue using the 7AT on the VQ37s, as well.

Quote:

Originally Posted by Arnold K. (Post 1461126)

I don't care about what a 1 inch picture looks like. You're not thinking logically about this whole situation at all. If oil pans and oil coolers are the same, that means internally and dimensionally the transmission has remained largely untouched with the exception of a ratio change, which involves a different set of cogs, and perhaps some internal component strengthening. Though nowhere in that press release did Nissan mention anything about strengthening the transmission, but they went through great lengths to talk about the changes made to the VQ37.

What you fail to understand is that the 5AT and 7AT bolt right up to the VQ35HR without any issues at all. That alone shows how similar the transmissions are that Nissan was able to just swap one out for the other 1 or 2 years later, and then continue using the 7AT on the VQ37s, as well.

You think that just because the 5AT and 7AT bolt up to both the VQ35 and VQ37 that they are the same transmissions internally? :rofl2: :gtfo2:

Uhh, no. You're taking my use of the word "internally" at face value, notice I specified dimensionally first - because if they were internally identical, then it'd still be a 5 speed, which we know isn't the case. I also mentioned that the gears are clearly different, and wouldn't be surprised if some components were stronger. Regardless, I have no doubts that they are very very similar in many ways.

So you want to think that the 7 speed and 5 speed are nearly identical because they share similar model names, share the same oil pan, and bolt onto the same engine. But you want to overlook how the transmissions have a different case and internals? Well I'm done with this thread, happy holidays everyone.