Im going outside right now...

 

sure. if you don't like it, plug it back in. I agree that it is a pretty hard 1-2 shift. It's nice to know that if you wanted to do it at the track or something you could and then undo it after. It would be cool if there was a way to put a switch in between the plugs so that you could manually switch it on/off from inside the car for those rare times that you want to get a jump at a stop light.

 

Better yet, being able to "dial-in" the firmness as was mentioned earlier. That would actually be something worthwhile

 

To get the best out of this mod, hook it up to a normally closed N/C WOT switch. That way it only works on WOT, it way too harsh for part throttle.

I have used it this way for a couple of months now and believe you get the best of both worlds faster shifts at WOT and nice soft ones at part throttle. Of course you could adjust the WOT switch as well to have it come on at part throttle wherever you want.

 

I'm pretty impressed - gonna go try this now I think Maybe I can finally get Max to shift like the Silverado HD! Definatly like the feel of a firm shift, not the long pause that my Maxima has... Wish I had known about this 3 weeks ago when I went to the drags... oh well. there will be a next time.

This mod simply allows for the full line pressure for the shifts huh? So thats a good thing, right? Less resistance of the tranny fluid means its easier for the tranny to shift... but... if the shifts are harder, couldnt that shock be harmful to the tranny? or engine?

 

Do you have a write-up and part numbers?

 

damn i gotta wait till 4 to try it out. i guess you need to see how it is for yourself then. i will report back later

 

I don't have a part#, but its just a simple N/C microswitch with 2 wires that interrupt either wire on the drop resistor. The switch is the same as the WOT ones used on a nitrous setup except they are normally open N/O not N/C.

Also don't bother trying to dial in the firmness with a variable resisitor or a different sized fixed resisitor, been there, done that, it doesn't work, its either full line pressure or stock, there is no in between. I spend two days trying do the exact same thing. The idea is great but the circuit just doesn't operate like that.

BTW I have used this mod for over 2 years now but only started using the WOT idea after Deezo mentioned it. Prior to that I had it on a switch under the dash and just switched it on and off when required.

 

ok one last question before i try this. if its a hard shift and hear a thud ist that kind of bad for the tranny. i dont want to mess up my tranny since its a new car. also how did u ever find out about this???? thanks for the tip

 

just did a trial oh my car (waitin for my gf to get out of class ) this certainly does work. Under normal acceleration, the shift is firm, but a good firm. I imagine this is how a BMW shifts in sport mode or something.

My question is: WHen I went WOT, the shift did not seem faster at all... granted, I only drove my car for about 3 minutes, so the tranny wasnt nearly warmed up yet, but to those who have done this - once everything is warm, does the WOT shift feel the same as medium acceleration shifts?? Hope so, cause then I'll hafta do the splice job and hook up a switch to turn off the sensor when necessary. Great find on this modification!!!

 

I just tried it... its shifts really hard! Could this be good for the trans mounts? Its quite a loud *thud*! I would consider making a switch for it. But I have to say it shifts FASTER. I got it to chirp 2nd gear. I got a SES light after the 1st restart.... going to get the code read now.

 

When your car is warm the shift is definitely quicker at WOT. For the person that asked, I found out about this through Iron Lung, who found out about it through Jime.

 

According to Mark (NissanX) this seems similar to a mod 3rd genners do as well.

 

keep me posted on that por favor

 

Did you through any codes??

 

well I did it and drove for about 10 minutes...the "thud" really got to me and I didnt like it..shut the car off for about an hour and went out again, once I turned the car on guess what??? I got the DAMN SES light!!!!! So I plugged it back in turned the car off than on, still got the SES light! Well I just removed the negative terminal of my battery to reset it and still got the SES light..anyone know how else to get rid of it..I really dont recommend this but if you like "thudding" between 1-2 gear especially below 45mph..go for it..somebody help please

 

Leave the battery disconnected for at least an hour.

 

dont mean to hijack the thread, how come we cant see our pics in our sigs anymore??

 

After disconnecting the battery for at least an hour it should not come back on.

 

After reading through this thread I've thought about something. Since all you have to do is unplug this sensor and you have full line pressure, I'm sure you can mod teh HKS ALC to control everything like it does for the 300ZX A/T. To me this is just a little safer then just running without the sensor. You can actually control your shifts with that. I'll do some research and see if it's possible.

 

Keep us posted on that!

chigga, the code is P0475 - Line Pressure Sol / Circuit
Line Pressure S/V

I drove to Orlando with it the dealer there said it was very uncommon, and that It damages the transmission, its a very unpleasant experience cause during slow driving the shift is so abrupt. He also said the plug circuit works seamlessly with the DBW system with the 2k2 and it also threw a TPS code. I was going 46 mph when the code was thrown. they have seen it happen a few times, but only on cars that were in a wreck and the resistor was busted.

 

It really depends on how you drive as to whether or not the 1-2 shift is hard. I've been driving with it long enough to know how much gas to give it so it doesn't slam into gear. Also, let off the gas in first gear just slightly and it should shift into 2nd without being too rough.

 

well I did what you said Y2KSESteve, had the battery disconnected for over an hour and still I got the light..is there any other way to reset the ECU? Did I throw a code now that only the dealer can fix..btw the car still drives fine, powerful like its always been

 

It should go off after a while of driving. Your ECU needs to re-learn everything and that does take some time.

 

yeah steve, I let go of the gas a lil for the 2nd gear shift, and it was extra smooth. Im going to use it next time I goto the track..... TitaniuMax... You can let it cycle and reset itself... the battery disconnect WILL NOT work for 2k2+ models... You will have to do the Drive BY wire trick.... find "Studman" (Jeremy) he has the procedure listed on his WWW site.. or you may do a search for it.

 

Is this mod going to void the warranty? And should i put it back when i go to the dealer?

 

A 25-hour battery disconnect should reset the ECU properly. Officialy its 24 hour, but an extra hour will help avoid unneccessary delays.

 

it wont let me "search" for Studman..anyone have his homepage or writeup for the Drive By wire trick??

 

try this to reset the ECU:

http://maxima.theowensfamily.com/reset-ecm.jpg

 

hey to y2ksteve or anyone else who has done this, i tried taking the sensor off last night of my 2k1 and was their struggling for about 10-15 minutes, is their a trick to pulling the sensor out?? for someone reason it was tough i pressed both sides of the sensor down with my fingers and pulled as hard as i can and still no luck

 

The sensor can be a PITA, but there is only one side you really need to push down on to get the sensor un-plugged.

 

I just used a set of pliers, taking it off was a lot easier that way.

 

took me a few times to get it right but it finally worked! thanx mang

 

I tried to reset the ECU today and I swear did exactly as those instructions said and I've tried 20 times but I'm still unable to get the SES to go away!!! What am I doing wrong? PLEASE HELP!!!

 

looslip, you are going to have to use a stopwatch... the timing has to be VIRTUALLY PERFECT... It takes me about 5-6 times to reset it each time. Its a pain.

 

Wow, you're right. You really need to get that perfect timing. Thanks I've got it to reset now.

 

yea i did the same thing...took me 6 trys to make it work

 

so whats the word on whethr this is harmful, helpful, or has no effect on the tranny? The way it banged into 2nd made me think that it is harmful, but I dont really know

 

i have been driving for 2 days now unplugged and no SES yet....

this would be nice to get a switch made... anyone done that?

 

Check the other thread on this page dude...someone is trying one now.