Quicker Auto Shifts

[SECURITY]

im curious to see what it feels like.

ill report back once ive tried it.

[n15m0]

im curious to see what it feels like.

ill report back once ive tried it.

Report back after a months of hard driving and shifting....if ur box is still alive we'll all do some cutting @!

[SECURITY]

what i might do is try this out for a few shifts, then buy the MV valve body upgrade and see what the difference is.

[VB-]

without having intimate knowledge of the nissan auto, my guess would be it is the signal for the 'force motor'. this lowers transmission pressres and makes shifts smoother, and by cutting the wire, it sees none, shifting very hard. normally ppl just use software and set the signal to 0 but this is another way of doing it.

to make shifts smooth, the box just slips on the band, but when it bites hard like this, theres no slip, and less wear on the band, which actually means less wear and tare on the box, not more. in the case of gears being smashed, i dont htink this would happen, but thats just my opinion.....

now that i've said all that im probly wrong any gurus confirm this?

Edited November 20, 2006 by VB-

[chris davey]

^^^

I was going to say the exact same thing.

[VB-]

did you steal it from HPI mag too?

[SECURITY]

just did this to my car and attached a little switch to it. it seems fine

it doesnt crunch and it doesnt ease onto the auto clutch plates, it just shifts.

im going to see how it goes for a few days, so far so good.

[SECURITY]

just took it for another spin. it really doesnt seem like its doing any damage.

it changes into 2nd as soon as i put it into 2nd. this would be very handy at wsid where you could lose up to a second from changing from 1-2 and 2-3.

ill report back soon

[VB-]

does it chirp second goin flat out?

[MBS206]

You won't be putting overly too much stress on the box at all.

Although, sudden and hard shifts, whilst not slipping the bands, JOLT the bands and cause them to stretch.

But where your hard shifts are affecting, are the engine, not overly, but very silghtly, but you're putting ALOT more pressure through the diff/axles etc.

[T04GTR]

well the botom line is it seems to do the same thing as a shift kit yess?

hrmm i wonder if you could do it to a supra or sourer. to remove the mad fart noise on upshift lol.

[VB-]

well the botom line is it seems to do the same thing as a shift kit yess?

hrmm i wonder if you could do it to a supra or sourer. to remove the mad fart noise on upshift lol.

im assuming you could, just locate the force motor, then cut the wire to it, or even put in a dash mounted switch, one for cruisin with friends, one for going quick. persoanlly i like the feeling of a shift kitted auto.. but yeah some people might not, and i guess it i actually owned a shift kitted auto i might get sick of it too....

[Adriano]

im pretty sure they dont have bands, the most likely damage to the box will be the clutches having the friction material delaminate, auto's tend to start slipping instead of breaking the gears, as the degisn of the gears make them very strong.

[SirRacer]

the internet mechanics talk

i did it to my cefiro and it worked really well

[J_R32]

does anyone know what wire should be cut/disconnected in a auto r32? all i know is that there is a loom connection(plug) in the engine bay for the auto but i am not sure if this is the correct plug to disconnect

[SECURITY]

this seems to do exactly what the valve body upgrade does. but because it doesnt retard timing anymore, does that mean ill need to dyno tune my car again?

with the new turbo it feels good. shifts are nice and quick, no more bouncing on redline before the gear changes.

ive got an issue with it not holding 3rd gear when you're off the gas, this will suck around a track. when cruising in 3rd, im used to the car holding the gear but with this mod it drops to neutral when i let go of the accelerator... but that i can live with.

also, does anyone have the wiring diagram for this section of the wiring?

[Abo Bob]

Of course they have bands. http://auto.howstuffworks.com/automatic-transmission1.htm

What do you mean by not holding 3rd gear Joe? In my old auto the overrun servo wasn't engaging so that the revs dropped when you took your foot off the accelerator. It was still in gear and the engine could still drive the wheels but the wheels couldn't drive the engine if you know what I mean.

[D-limo]

the internet mechanics talk

i did it to my cefiro and it worked really well

I was just going to ask how would one go about performing this mod on a Laurel?

[Darkboy]

Of course they have bands. http://auto.howstuffworks.com/automatic-transmission1.htm

So after reading this article I still can't conclude whether this mod is good or bad for the box or engine. Information overload here!!!

Anyone else have any new thougths on this as I'm still not game enough to do the mod...but I'm becoming intrigued!

[AWD2Go]

So after reading this article I still can't conclude whether this mod is good or bad for the box or engine. Information overload here!!!

Anyone else have any new thougths on this as I'm still not game enough to do the mod...but I'm becoming intrigued!

It will be a case of give and take...

By shifting harder it will transmit more load to everthing in the box and everything that follows it, but bear in mind it is going to excert far less load than slaming through a manual box.

With a manual box you are (with a decent clutch) shock loading the box by transmitting the load without a stally or clutch pack to soften the coupling to the auto box.

So if you drive train would hold up to a manual it will hold up to any shift kit you might add.

Contrary to popular belief a shift kit will save more parts than it will harm. Yes it will wear out some parts mariginal more like plantaries etc but it will reduce wear on others like the clutch pack / plates etc.

If the mod only boosts system pressure it should be fine as that is basically all a basic shift kit does anyway