Any 05AT owners get resolution for the rough 2->3 shift?
#17
Originally Posted by da mayor
thats called a car having plenty of power.... try driving a supra, evo, sti and they all have the "thump"
When in manual mode, the thump primarily occurs when you are pressing the pedal more aggressively and usually the shift would occur at 5k-6k. But if you short shift it, the tranny isn't prepared to shift at that point but you are forcing the shift. It shifts but can't regulate all the conditions as effectively so you get a more forceful (waaay less smooth) "thump". Now the other gears don't thump but they still shift way harsher than left in full auto mode.
#18
I wish my 03 had this problem ![Frown](https://g35driver.com/forums/images/smilies/frown.gif)
Anyhoo, it's probably the TCU telling the tranny to shift at a higher line pressure. It's assuming when you are in MM, you are going to drive it more agressively thus a higher line pressure is dialed in.
Why can't anyone offer a TCU mod like the ECU mod? There's only about 10 gazillion G35 autos running around. UGH!
![Frown](https://g35driver.com/forums/images/smilies/frown.gif)
Anyhoo, it's probably the TCU telling the tranny to shift at a higher line pressure. It's assuming when you are in MM, you are going to drive it more agressively thus a higher line pressure is dialed in.
Why can't anyone offer a TCU mod like the ECU mod? There's only about 10 gazillion G35 autos running around. UGH!
#19
Originally Posted by Jeff92se
I wish my 03 had this problem ![Frown](https://g35driver.com/forums/images/smilies/frown.gif)
Anyhoo, it's probably the TCU telling the tranny to shift at a higher line pressure. It's assuming when you are in MM, you are going to drive it more agressively thus a higher line pressure is dialed in.
Why can't anyone offer a TCU mod like the ECU mod? There's only about 10 gazillion G35 autos running around. UGH!
![Frown](https://g35driver.com/forums/images/smilies/frown.gif)
Anyhoo, it's probably the TCU telling the tranny to shift at a higher line pressure. It's assuming when you are in MM, you are going to drive it more agressively thus a higher line pressure is dialed in.
Why can't anyone offer a TCU mod like the ECU mod? There's only about 10 gazillion G35 autos running around. UGH!
#20
#21
#22
The the shift firmness I don't have a big problem with. It's the shift logic that chaps my butt. I'll have to arrange to have the latest tcu flash done from Infiniti to see if that does anything.
Plus VB mods are what? $800-$1200??? Here is a clue. I don't think a VB mod on a RWD auto is that much diff than an FWD auto tranny. Now remember what the maxima VB mod used to cost??? MARKUP anyone?
Plus VB mods are what? $800-$1200??? Here is a clue. I don't think a VB mod on a RWD auto is that much diff than an FWD auto tranny. Now remember what the maxima VB mod used to cost??? MARKUP anyone?
![Mad](https://g35driver.com/forums/images/smilies/mad.gif)
Originally Posted by UMD_terp
hmmm... inside the tranny?
Good thing I am happy with the way mine shifts for now![Smilie](https://g35driver.com/forums/images/smilies/smile.gif)
Just get a VB mod if you want harder shifts![Wink](https://g35driver.com/forums/images/smilies/wink.gif)
Good thing I am happy with the way mine shifts for now
![Smilie](https://g35driver.com/forums/images/smilies/smile.gif)
Just get a VB mod if you want harder shifts
![Wink](https://g35driver.com/forums/images/smilies/wink.gif)
#23
Originally Posted by Jeff92se
The the shift firmness I don't have a big problem with. It's the shift logic that chaps my butt. I'll have to arrange to have the latest tcu flash done from Infiniti to see if that does anything.
Plus VB mods are what? $800-$1200??? Here is a clue. I don't think a VB mod on a RWD auto is that much diff than an FWD auto tranny. Now remember what the maxima VB mod used to cost??? MARKUP anyone?![Mad](https://g35driver.com/forums/images/smilies/mad.gif)
Plus VB mods are what? $800-$1200??? Here is a clue. I don't think a VB mod on a RWD auto is that much diff than an FWD auto tranny. Now remember what the maxima VB mod used to cost??? MARKUP anyone?
![Mad](https://g35driver.com/forums/images/smilies/mad.gif)
I was looking at how much a VB mod costs... it's pretty bad. I remember Don in Texas doing them for cheap if you sent in your VB. As far as I know, there are two methods to the VB... replacing the internal springs with stiffer ones or changing out some pressure plate to increase line pressure... $1k for a VB mod is a lot...
#24
This happens to me ('05 X) and to me it should NOT be considered normal. If it was "normal" then it would do it in all gears changes but it ONLY does it when going from 2->3. All other upshifts are not effected.
Man, if you are hard on the gas and upshift to 3rd it feels like something hit the bottom on your car.
Man, if you are hard on the gas and upshift to 3rd it feels like something hit the bottom on your car.
#25
Found this out a long time ago. Either leave it in D or before you go into 3rd, take foot off gas, shift, then gas (at least that's what I would do when I drive MT anyway). But the lagging on the automatic is horrible so I leave it in D almost all the time now (except on highway when I use 4 or 5th gear back and forth).
#28
Actully I just installed the gen2 Stillen exhaust lastnight and the thud is hardly noticable at any RPM range. I will do more testing.
I normally use the manual mode in heavy traffic so I don't have to break/gas all the time with the stop and go.
Lol, if you have to shift at a certain RPM range or have to lift and then shift, that's hardly what I call "manual" :P
I normally use the manual mode in heavy traffic so I don't have to break/gas all the time with the stop and go.
Lol, if you have to shift at a certain RPM range or have to lift and then shift, that's hardly what I call "manual" :P
#29
Originally Posted by CGYg35x
Lol, if you have to shift at a certain RPM range or have to lift and then shift, that's hardly what I call "manual" :P
#30
Mine bumps sometimes during the 1-2, sometimes during the 2-3. I don't worry about it. As long as the tranny doesn't splatter itself all over the street, I'm good with it. It's done it since day one and it'll probably be doing it the day I send her away.
Not a big deal - I call it normal.
Not a big deal - I call it normal.