This is normal. The tranny in my AT G does this and its annoying.. I have confirmed this with other people in the G world..

You should see what happens when you're rolling around 5 mph in 2nd then tap it into first lol. When I do that some electronic module thing starts going off and makes a "t-rrrrr" zipping sound for a split second then there is a plusing sound.. This all happens very quick but all normal.

Edit: Just to be clear. Yes my car has a violent jerky shaky down shift in "D" coming from 2-1 when going slow.. The triptronic thing is just as bad. Normal.

Mine does this sometimes in D

It's normal for some jerkiness while in M mode. The "auto" downshift in M is at a low RPM as others have mentioned. It's not normal to jerk in pure D mode however.

I ran some parking lot tests in my car coasting at 15MPH down to 0 (level and up a slight hill), and the car did downshift before stopping, at a very low speed. There was no jerkiness in M or D mode going from 2 to 1.

The sport brakes are a little grabby, and I have never noticed the downshift even when barely using the brakes.

My car has 18,000 miles but I am the second owner.

Did you guys notice the last post on this thread was 4/15/2009 and, all of a sudden, goes to today? Kinda odd how 1 1/2 years go by and the thread continues right where it left off.

It is what happens when good users search before opening new topics :D

Normal. Probably either something that could be smoother in the rev matching logic or something due to the physical actuation of going from lock-up to fluid coupling from 2nd to 1st.

Don't really like this transmission...
 

I used to owe a 350z automatic with manual option, and that was the best I have owned so far. I currently own a 370z with similar transmission and I have experienced rough shifting when upshifting or downshifting. Though I don't usually shift down to 2 or 1. This is quite disappointing since I love nissan products. I believe that they should have limited their gears to 6 not 7 for automatics, but I can see why at this time they didn't - lower rpm while cruising.

Mine does that too only in M mode. Had chance to took my car to the dealer last year, but the tech told me not to using M mode...:shakes head::icon14:
Now I have about 24000 miles on it but the jerk is still there but not that bad though. Maybe Im getting used to.:driving:

The tech's "solution" was to tell you to not use manual mode? :icon14: You shoulda' told the tech to :gtfo2:...

Mine AT does the same thing....the downshift into lower gears isnt as smooth as id like it to be. I dont notice it at all when I put it into normal drive mode.

It only does this when you let it downshift for you, because you've gone way below useful RPMs. IMHO, either downshift earlier and stay in a useful band, or if you're coasting down to a stop gently just pop it into D or N.

You know you resurrected this thread from 2009.

My Z is pretty jerky in manual mode. Especially if you use the stick inste:shakes head:ad of the paddles. I kinda like it. It reminds me of the way the old 280z manuals used to feel like. Everytime I take off hard I think of that scene in cheech and chong up in smoke, when he meets chong for the first time. Lol. He's flippin gears and his car is jerkin while shifting. Its fun.
On another note. When I'm light on the peddle, there's barely any jerkiness if not any.

mine is more jerky in auto than with the paddles. It like my Z doesnt know the right gear to be in sometimes, keeps changing its mind at times