Jump to content
SAU Community

Recommended Posts

  • 2 weeks later...
  • Replies 60
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

Posted Images

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.

usually when im in 3rd with the overdrive on it will hold 3rd like a manual does. with the wire cut, i put overdrive on as usual and it accelerates like normal, but as soon as i stop accelerating it drops to neutral.

any further updates on how the boxes are holding up after a few months of doing this???

box is fine. ive done a few runs with it and still feels fine... ive got a switch hooked up to mine so its on and off pretty often.

http://forums.maxima.org/showthread.php?t=285482

Maximas apparently have a similar thing. Its not quite the same, but some similar techniques could be used - such has having a micro switch setup so that you only get the hard gear changes when you have a WOT (wide open throttle).

Ok, after a bit of reading i found out how to do it, and you dont even need to cut the wire. Just unplug the little silver/grey box labeled 'JECS' near the fuse box (on the r32, not sure where it is on the r33).

Partial throttle changes were alot more chunky.. didn't notice a heck of alot on WOT, but i need to do a bit more testing in non-50k areas.

Ok, after a bit of reading i found out how to do it, and you dont even need to cut the wire. Just unplug the little silver/grey box labeled 'JECS' near the fuse box (on the r32, not sure where it is on the r33).

Partial throttle changes were alot more chunky.. didn't notice a heck of alot on WOT, but i need to do a bit more testing in non-50k areas.

What does that jecs box do?

From what I understand its just a resistor - however when unplugging it you also break a circuit that controls a solenoid which sets the pressure in the auto boxes. By disconnecting the solenoid the autobox stays at full pressure the whole time. (or something like that)

  • 5 months later...

so i gave this a shot in my r33 gtst tonight. thought why not if it doesnt work ill just wire it back up.

shifts are definatly firmer and quicker, when you give it some it feels alot smoother cause its not messing about thinking about changing gears.

with overdrive off (yellow light on in the dash) when you release the throttle it does knock it back into neutral. ive also found that when this happens and you are going around 70-80kph (downhill) the car tends to jerk on and off, like its trying to stop or change gears or something??

does this happen to you security?

anyone else have any ideas?

  • 1 month later...

i have a switch on mine like security does. its been on and off for a month or so and i havent had any problems with it.

i did get sick of it changing back to neutral when i have overdrive off and i stop accelerating, so i usually have the switch set to off so i get normal pressure and normal changes.

its probably ok for a quick fix until you get a mv valve upgrade. but id at least put a switch on it

I Dont Understand Why All You Guys Are Mucking Around With This Mod??????

For Under $300-$400 You can Get a Shift Kit Fitted To Your Car. Its Done Properly

And By Proffesionals. Cutting Transmission Wires Has'nt Been Tried And Tested.....

The Valvebodies Are Avaliable From Melbourne (Knox Auto's) or Adelaide (Mv Autos)

OK, someone asked about the viability of this cutting on an R34...and just today I got told about the MV Valve Body kits. Been wanting to do something to the gearbox for ages (tiptronic GT-t) but didnt know what/how and now that I know there's something on the market, could i get the contact info for MV Auto? Possibly e-mail too as i live in New Zealand. I am not fond of the cutting idea so i'd like to get in touch with MV Auto and ask them for specifics for the kits and shipping/DIY fitting instructions etc...

So far, quite a few people mentioned the kit on R32's and R33's but I've yet to hear about the effectiveness on tiptronic shifts for R34's.

Anyone got it done?

Cheers

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • Yeah I suspect even if you hold airmass per cycle/cylinder constant if you get too far away from stock you're still going to have problems running the factory tune within the bounds of the factory load scale. Cams, different displacement/rod ratio, etc. I'm just lucky that the GTIII-SS with wastegate boost + CA compliance cats is pretty much equivalent to stock turbos. When I have actual space I can finally get it tuned and modify the fuel system for flex fuel to 100% handle any detonation concerns when cranking the boost to whatever those dinky turbos can put out.
    • I would say no, why, because my daughter, who also lives in Goulburn, hasn't recommended us going there Pity, as we miss all the German joints around in Sydney, actually, the restaurants are the only thing I really miss about Sydney, and a special mention to Ishibanboshi at Bondi Junction, their Kara-age Don is heart cloggingly deliciousness (always added a special boiled egg...or 2) 😋 
    • Does that German restaurant still exist in the old place out the NW end of Goulburn? When I say "out the NW end of"...I am really being vague. It was 1997 when I was last there, and the only point of reference I can recall is that it was on the opposite side of the main drag from the big merino. And when I say "opposite side of the main drag", I don't mean "on the main drag". It was either a couple of streets back from there, or might have even been out in the sticks a bit further. Was an old farm building or mill or somesuch. And when I say "the big merino" I might actually be thinking of a completely different part of town, because I just looked on maps and the big bugger is not where I remembered him to be! The food was good, consisting largely of various German mystery-meat sausage/loaf things and kartofflen.
    • So while the second sentence is completely correct and the whole point of the conversation, the first sentence bears consideration. If this bloke is just hoping to throw big turbos on and drive it around, because there are no helpful facilities at all in his tropical paradise** then he likely has zero chance of even knowing what the TP is on the last column in the stock maps, let alone know whether the ECU is operating anywhere near it or past it. So the point is very very moot. And, per what I said before, at stock boost on those turbos, you may well be off the end of the map. **I'm just back from Vanuatu, so I know exactly what small Pacific nations can be like wrt paradise without requisite facilities. But it's not even that simple. I put a high flow on my car and had to drive it around without a proper tune because of the lack of opportunity*** to put the bigger AFM and injectors into it to allow it to be tuned. I had to turn the boost down to less than I had before, and back off the boost controller's ramp, because it was exploring parts of the map that it didn't drive in before, and really couldn't access for tuning on the dyno either, and so was pinging. It was still well within the last column, because when I first**** set up the Nistune on the Neo I rescaled all axes of the maps to give some more space to explore. ***Family dyno was broken ****This was 13 years ago, and the TIM thing wasn't a thing then and so TP would definitely grow when pushing past the stock tune's limits.
    • Yep, this bit another local owner. I caught it before putting the transmission back into the car, what I noticed was the pressure plate fingers weren't flat and even. It's more obvious with the pull style clutch because the throwout bearing ring was visibly not flat once everything is put together. Nismo should really update their instructions to call out this specific detail. I'm not even sure the clutch as-shipped orients everything properly.
×
×
  • Create New...