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Urgent: Do I Need To Upgrade My Auto Transmission When Upgrading Performance

re34perGTT
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re34perGTT Community Regular

re34perGTT

Posted
Posted

I own an auto 1998 r34 gtt and I'm thinking about getting a larger turbo (roughly 350 hp rated). With manual cars the clutch would need to be upgraded but would anything need to be upgraded with an automatic ??

Any replies will be greatly appreciated

Cheers, angelo

scotty nm35 Grand Master

scotty nm35

Posted
Posted

Yes, you need a shift kit and a transmission cooler for that sort of power.

What sort of turbo is it? Usually people say the brand or part number, not just the power it can make. I hope this isn't an ebay chinese copy of a real turbo...

re34perGTT Community Regular

re34perGTT

Posted
  • Author
Posted

Okay thanks for that , really appreciated ! :)

And I'm not sure yet. It's out of some guys totalled gtst who said it was making that much power. It's a gumtree add and I'm trying to figure out weather to buy it or not. It sounds like it's the stock turbo high flowed but I'm not 100% sure

scotty nm35 Grand Master

scotty nm35

Posted
Posted

Okay thanks for that , really appreciated ! :)

And I'm not sure yet. It's out of some guys totalled gtst who said it was making that much power. It's a gumtree add and I'm trying to figure out weather to buy it or not. It sounds like it's the stock turbo high flowed but I'm not 100% sure

I don't like buying S/H turbos unless I can hear them running, but if it's stacked at least there is a legitimate reason for selling.

Depends where you go, MV Automatics in Adelaide apparently do a valve body swap service if you are mechanically minded, or get your mech to look into it? If you had a location I could possibly help more.

At a guess, the shift kit would cost $600 - $1200 fitted including fluids.

A trans cooler is $100 odd and can easily be mounted by removing the front bar. You should be able to manage that yourself, or find a handy mate and offer him bourbon.

re34perGTT Community Regular

re34perGTT

Posted
  • Author
Posted

I'm in Perth. Also thank you so much for all the help !!!

Also even if the turbos broken I don't mind. The guy doesn't know too much about cars and he's selling me the turbo, some injectors and an electronic boost controller for $400. Bargain of the year :D

KiwiRS4T Grand Master

KiwiRS4T

Posted
Posted

I'm in Perth. Also thank you so much for all the help !!!

Also even if the turbos broken I don't mind. The guy doesn't know too much about cars and he's selling me the turbo, some injectors and an electronic boost controller for $400. Bargain of the year :D

So you'll need an aftermarket ecu or Nistune chip at least, a bigger AFM, possibly some oil and water lines and new exhaust and preferably a manual conversion!
  • 1 month later...
scithe93 Contributor

scithe93

Posted
Posted

also price for shift kit varies bepending on brand and if yo want a stage 1, 2 or 3 ect but just for a rough base line a stage 2 shiftkit for my old 31 skyline auto cost me 1290 fitted

Kinkstaah Grand Master

Kinkstaah

Posted
Posted

I have gone from the standard shift kit to pretty much everything you can do to a R34, and the difference is beyond night and day. Absolutely absurd. I drove a stock one and almost laughed myself off the road.

You have two options

1) Stick with and upgrade the auto (no one really does this long term other than stupid me)

2) Go manual

I entirely understand why people driving stock Skylines pretty much go LOLZ AUTO LOLOLOLOLOLOOLO.

scotty nm35 Grand Master

scotty nm35

Posted
Posted

Talk to mv autos in Adelaide. I had a 34 box built full manual valve body converter etc for under $4000.

Manual valve bodies are absolute crap compared to an aftermarket programmable transmission controller. ;)

  • 1 month later...
V28VX37 Veteran

V28VX37

Posted
Posted

I ran 200rwkw through the Tiptronic and it was fine-ish. Then went 260rwkw+ and it was s__thouse -> converted to manual.

I'd suggest doing the shift kit early, should make the box last a bit longer. And the cooler. Plus anything else Scotty and Greg recommend.

(Also if you're spending little money on the turbo you will end up spending much bigger money on everything else around it. There's no cheap way out, really.)

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