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

    • Update 3: Hi all It's been a while. Quite a lot of things happened in the meantime, among other things the car is (almost) back together and ready to be started again. Things that I fixed or changed: Full turbo removal, fitting back the OEM turbo oil hardlines. Had to do quite a bit of research and parts shopping to get every last piece that I need and make it work with the GT2860 turbos, but it does work and is not hard to do. Proves that the previous owner(s) just did not want to. While I was there I set the preload for the wastegates to 0,9bar to hopefully make it easier for the tuner to hit the 370hp I need for the legal inspections that will follow later on. Boost can always go up if necessary. Fitted a AN10 line from the catch can to the intake hose to make the catchcan and hopefully the cam covers a slight vacuum to have less restrictive oil returns from the head and not have mud build up as harshly in the lines and catch can. Removed the entire front interior just shy of the dashboard itself to clean up some of the absolutely horrendous wiring, (hopefully) fix the bumpy tacho and put in LED bulbs while I was there. Also put in bulbs where there was none before, like the airbag one. I also used that chance to remove the LED rpm gauge on the steering column, which was also wired in absolute horror show fashion. Moved the 4in1 Prosport gauge from sitting in front of the OEM oil pressure gauge to the center console vents, I used a 3D printed vent piece to hold that gauge there. The HKB steering wheel boss was likely on incorrectly as I sometimes noticed the indicator reset being uneven for left vs. right. In the meantime also installed an airbag delete resistor, as one should. Installed Cube Speed premium short shifter. Feels pretty nice, hope it'll work great too when I actually get to drive. Also put on a fancy Dragon Ball shift knob, cause why not. My buddy was kind enough to weld the rust hole in the back, it was basically rusted through in the lowermost corner of the passenger side trunk area where the wheel arch, trunk panel and rear quarter all meet. Obviously there is still a lot of crustiness in various areas but as long as it's not rusted out I'll just treat and isolate the corrosion and pretend it's not there. Also had to put down a new ground wire for the rear subframe as the original one was BARELY there. Probably a bit controversial depending on who you ask about this... but I ended up just covering the crack in the side of the engine block, the one above the oil feed, with JB Weld. I used a generous amount and roughed up the whole area with a Dremel before, so I hope this will hold the coolant where it should be for the foreseeable future. Did a cam cover gasket job as the half moons were a bit leaky, and there too one could see the people who worked on this car before me were absolute tools. The same half moons were probably used like 3 times without even cleaning the old RTV off. Dremeled out the inside of the flange where the turbine housing mates onto the exhaust manifolds so the diameter matches, as the OEM exhaust manifolds are even narrower than the turbine housings as we all know. Even if this doesn't do much, I had them out anyways, so can't harm. Ideally one would port-match both the turbo and the manifold to the gasket size but I really didn't feel up to disassembling the turbine housings. Wrapped turbo outlet dumps in heat wrap band. Will do the frontpipe again as well as now the oil leak which promted me to tear apart half the engine in the first place is hopefully fixed. Fitted an ATI super damper to get rid of the worn old harmonic balancer. Surely one of the easiest and most worth to do mods. But torquing that ARP bolt to spec was a bitch without being able to lock the flywheel. Did some minor adjustments in the ECU tables to change some things I didn't like, like the launch control that was ALWAYS active. Treated rusty spots and surface corrosion on places I could get to and on many spots under the car, not pretty or ideal but good enough for now. Removed the N1 rear spats and the carbon surrounding for the tailpipe to put them back on with new adhesive as the old one was lifting in many spots, not pretty. Took out the passenger rear lamp housing... what do you know. Amateur work screwed me again here as they were glued in hard and removing it took a lot of force, so I broke one of the housing bolts off. And when removing the adhesive from the chassis the paint came right off too. Thankfully all the damaged area won't be visible later, but whoever did the very limited bodywork on this car needs to have their limbs chopped off piece by piece.   Quite a list if I do say so myself, but a lot of time was spent just discovering new shit that is wrong with the car and finding a solution or parts to fix it. My last problem that I now have the headache of dealing with is that the exhaust studs on the turbo outlets are M10x1.25 threaded, but the previous owner already put on regular M10 nuts so the threads are... weird. I only found this out the hard way. So now I will just try if I can in any way fit the front pipe regardless, if not I'll have to redo the studs with the turbos installed. Lesson learned for the future: Redo ALL studs you put your hands on, especially if they are old and the previous owners were inept maniacs. Thanks for reading if you did, will update when the engine runs again. Hope nothing breaks or leaks and I can do a test drive.
    • No those pads are DBA too  but they have colors too. I look at the and imo the green "street" are the best.
    • I’m not sure what happened I told them about sonic tunes free OTS tune and the next the I know .. I was booted..   To funny 
    • Yea - I mean I've seen my fuel pump which is decades old and uh, while I'm not saying this with real knowledge... but I sure get the ick at using anything in the fuel system that produced the state of that pump. Many years ago I went through multiple pumps (and strainers) before I dropped the tank to clean it out with extreme violence. I'm talking the car would do maybe 50km before coming to a halt, which resulted in me cleaning out the filter with some brake cleaner and going on my way. None of my stuff ever looked like what came out of your fuel tank. I don't think I'd be happy with it unless every single component was replaced (or at least checked/cleaned/confirmed to be clean here).
    • I'm not going to recommend an EBC pad. I don't like them. Just about anything else would suit me better. I've been using Intima pads for a while now.
×
×
  • Create New...