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R34 N/a And R34 Turbo (gtt) Transmission.. Uh, Problem.

Kinkstaah
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iseekool Veteran

iseekool

Posted
Posted
The R34 N/A has the shift computer built into a seperate ECU in the drivers side of the car, this alone controls the gearbox, not the main ECU.

If you've put in an auto GTT ECU, it has the shift computer internal, so both shift ECU's will be sending signals to the box (confusing the fark out of it)

If you just put in the manual GTT ECU, it should all work just fine as it won't be getting the second lot of interfering signals. I ran a manual GTT ECU in my NA+t and the gearbox worked just fine.

*Slightly off topic*

Is the wiring regarding this setup "plug and play"? As in no messing around with the connectors.

Rolls Grand Master

Rolls

Posted
Posted (edited)

Surely a manual conversion would be the simplest and only guaranteed way to get it running without shelling loads trying 50 different things, plus everyone wants a manual don't they?

Edited by Rolls
Kinkstaah Grand Master

Kinkstaah

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666 Dan is spot on. The RB25DE version has a seperate computer for the auto on the right of the steering wheel. The automatic transmission is exactly the same so no point in changing it. The other difference is I believe that the DET has traction control and the DE does not so that could be a problem.

I have suggested an alternative for you. If that is no go as a last resort I would trailer the car to MV autos if there is no auto shop in your town who wants to sort it for you!!

This is going to be the ultimate plan. Currently workshops in Vic are wondering whether or not NISTune can be applied to the NA ECU and keep the wiring like that. I'm not optimistic, but given the fact MV are out of the country for a month, I guess I'll wait and see how that goes as I can't get it shipped there anyway. I did suggest the "Just wire it up and pretend it's a GTT gearbox and use the GTT Gearbox, GTT ECU, GTT Wiring and it should be OK" but coming from Mr Laymans terms, I don't really think anyone wants to listen to me, and tbh when you have an uninitiated customer telling experienced mechanics what to do, I guess its understandable. If they get it working their way, I quite frankly don't give two shits how. :D

Surely a manual conversion would be the simplest and only guaranteed way to get it running without shelling loads trying 50 different things, plus everyone wants a manual don't they?

I do agree, but I was told this should work, and got a shift kit installed, paid for, and had the trans shipped to and back to a different state under that impression that it'd work fine. I just don't feel like dropping 3-4K on a manual conversion when I really shouldn't need to from a customer point of view. I've bought another car in the interim as a daily to replace this daily (lol) so I'm not entirely crippled.

I guess word of warning if you want to do something like this in Victoria, is don't unless you can do it yourself. :D

666DAN Grand Master

666DAN

Posted
Posted
Currently workshops in Vic are wondering whether or not NISTune can be applied to the NA ECU and keep the wiring like that

Unfortunately it can't, the ECU is a different type of (basic) board with no expansion capability.

Kinkstaah Grand Master

Kinkstaah

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Unfortunately it can't, the ECU is a different type of (basic) board with no expansion capability.

Guess I'll wait and hear them say that, though I did say it probably wont work.. I guess this car is either going to be sent interstate or have someone from interstate come and look at it, coming down this way anytime soon Dan? :P

  • 8 years later...
Amghugs Rookie

Amghugs

Posted
Posted
On 10/21/2010 at 11:34 AM, Kinkstaah said:

Guess I'll wait and hear them say that, though I did say it probably wont work.. I guess this car is either going to be sent interstate or have someone from interstate come and look at it, coming down this way anytime soon Dan? :P

Hey man, did you manage to get this sorted? I need some help as I’ve done a turbo conversation on a rb25de neo ..

the car is a automatic and I bought a impul gtt ecu for a automatic r34 and the car is in limp mode, I’m using the stock n/a loom ..

i haven’t got the boost sensor or anything like that either .. I’ve tried to pm you but for some reason it doesn’t let me haha 

BK Grand Master

BK

Posted
Posted

is this ecu for use with the 25de loom with a turbo conversion, or just an automatic Gtt 25det ? If it's the latter your still in the same situation as your auto is wired and controlled from the separate auto module. An auto turbo ecu is not going to sort you out unless it communicates with the stock auto module.

Your really fishing on this one. STICK TO ONE THREAD FOR YOUR PROBLEM, as the same people will be telling you the same thing, no matter how many different threads you start. Gtsboy and Rusty nuts have already told you that using your Na loom with an auto turbo ecu ain't gonna magically fix anything.

I understand its a shit situation but your gonna have to go somewhere that has some experience with conversions like this.

  • Like 2
  • 6 years later...
albyz34gt Rookie

albyz34gt

Posted
Posted

@666DAN sorry to bring you and old thread. 

 

 I've got my de+t done and it's all running great other than 1 small issue. 

 

Car has remained auto with the na auto and tcm, I've used a stagea ecu with. NIstune board and everything is great other than my gear selection on the dash. It illuminates park, reverse, neutral, 3rd and 2nd when selected . But nothing when in  drive or what gear your in when you pop it into tiptronic. I'm sure there is maybe 1 wire in the ecu plug I need to move to rectify this. Do ya have any ideas?

 

 

Cheers man

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