tangcla Posted June 23, 2009 Share Posted June 23, 2009 Has anyone cracked the 5AT transmission yet? Link to comment Share on other sites More sharing options...
m sprank Posted June 23, 2009 Share Posted June 23, 2009 There is no TCU mod. IPT is your best bet for 5EAT mods. They offer VB mods, torque converters and full rebuilds (claimed good to 400whp). You can check them out here; http://www.importperformancetrans.com/ Link to comment Share on other sites More sharing options...
fishbone Posted June 23, 2009 Share Posted June 23, 2009 And yes, since you're in Australia and I have a feeling you're about to ask, they do ship international. What exactly are you looking to do to it, or what are you hoping to gain by cracking it? We could offer alternatives. Link to comment Share on other sites More sharing options...
tangcla Posted June 23, 2009 Author Share Posted June 23, 2009 And yes, since you're in Australia and I have a feeling you're about to ask, they do ship international. What exactly are you looking to do to it, or what are you hoping to gain by cracking it? We could offer alternatives. I want more rear split - in current form, the dyno shows as much as 70% front, 30% rear. A bit more rear bias would be good as well as faster shift times. Link to comment Share on other sites More sharing options...
underpowerd Posted June 24, 2009 Share Posted June 24, 2009 ^ that is surprising, always read we're supposed to be more rear-biased (60/40?) than the MT. Link to comment Share on other sites More sharing options...
tangcla Posted June 24, 2009 Author Share Posted June 24, 2009 Definitely not - very front biased. I've managed to get myself beached and get some major front-left wheelspin whilst trying to get out of a steep driveway in the wet, just like an inferior FWD. Rear wheels did nothing to push me out. Pretty useless, actually The front/rear split shifts depending on load and rpm, it seems. It gets to about 60/40 front/rear at some point. Link to comment Share on other sites More sharing options...
underpowerd Posted June 24, 2009 Share Posted June 24, 2009 ^ hmm, i don't feel that at all...i've had my fill of fwd/rwd, and under most conditions (understanding vtd is employed) my car definitely feels and acts like the 45f/55r i've seen it tagged as in a few sources. what year is your model, tangcla? also see that you're in oz, jdm trans? Link to comment Share on other sites More sharing options...
tangcla Posted June 24, 2009 Author Share Posted June 24, 2009 2004, 5EAT. I believe the transmission is the same across the world. Link to comment Share on other sites More sharing options...
fishbone Posted June 24, 2009 Share Posted June 24, 2009 The 5EAT split is 55.3% on the rear, 44.7% on the front. Your rear wheels didn't push you out tangla because the center diff did not lock-up. Since it's got viscous coupling, it takes a few seconds for the differential fluid to heat, shear and lock up the diff. Reprogramming the TCU would do nothing on the traction bias since you'd also have to mod the center diff and change the bias under normal conditions from a mechanical standpoint. I think the best idea is to get to know how the auto AWD system is set-up and should you decide it's not something you like, you may be looking at trading the car in as there's not much you can do about it. Link to comment Share on other sites More sharing options...
tmp Posted June 24, 2009 Share Posted June 24, 2009 Manuel trans has the viscous center diff. Auto trans has a variable clutch pack in the center diff controlled with a solenoid and hydro pressure from the trans. Link to comment Share on other sites More sharing options...
tangcla Posted June 24, 2009 Author Share Posted June 24, 2009 So if that happens again - what should I do to get rear traction? Link to comment Share on other sites More sharing options...
fishbone Posted June 24, 2009 Share Posted June 24, 2009 Let her keep spinning and it will lock up eventually tmp, who is Manuel? Is he Spanish? Joking aside, you are correct although I am under the impression the auto center diff also relies on fluid and is no better at locking up faster Link to comment Share on other sites More sharing options...
Guest Posted June 24, 2009 Share Posted June 24, 2009 So if that happens again - what should I do to get rear traction? Have some people push the car. Link to comment Share on other sites More sharing options...
tangcla Posted June 24, 2009 Author Share Posted June 24, 2009 Have some people push the car. Link to comment Share on other sites More sharing options...
kjiz Posted June 29, 2009 Share Posted June 29, 2009 Strange. So far everyone has said its a 45/55 front/rear split. When I drive in my works parking structure after it rains I can fishtail just by accelerating in a turn. The concrete is incredibly smooth. Link to comment Share on other sites More sharing options...
fishbone Posted June 29, 2009 Share Posted June 29, 2009 ^the 5EAT is particularly tail-happy when you try/push it. More traction on the rear plus lighter-weight on that end = fun times Link to comment Share on other sites More sharing options...
tangcla Posted June 29, 2009 Author Share Posted June 29, 2009 Drives a bit like both, actually. You only really need a very little bit of RWD push to get the stability. Link to comment Share on other sites More sharing options...
RJS5689 Posted July 4, 2009 Share Posted July 4, 2009 Manuel trans has the viscous center diff. Auto trans has a variable clutch pack in the center diff controlled with a solenoid and hydro pressure from the trans. Guys, Manuel is back again! Link to comment Share on other sites More sharing options...
captainhook Posted July 4, 2009 Share Posted July 4, 2009 VDC FTW in those situations! Link to comment Share on other sites More sharing options...
tangcla Posted July 4, 2009 Author Share Posted July 4, 2009 VDC FTW in those situations! I think VDC was only available in 2005 or 2006+ vehicles... no? Link to comment Share on other sites More sharing options...
captainhook Posted July 5, 2009 Share Posted July 5, 2009 I think VDC was only available in 2005 or 2006+ vehicles... no? I'm not sure about international models, but I think VDC was first introduced in the US Legacy in 2008. Link to comment Share on other sites More sharing options...
NSFW Posted July 5, 2009 Share Posted July 5, 2009 Let her keep spinning and it will lock up eventually That's the theory, but in practice I have not seen it work. They don't ever "lock up" the way we'd all like them to. One of our fellow forum members got stuck, had two wheels spinning at opposite corners, and wasn't going anywhere. We gave the diffs plenty of time to "lock up" but they just don't. From the inside I've experienced this in two cars (my LGT and my old car, a 325ix with center and rear VCs). VC diffs will transfer some torque, but not all of it. If you're stuck well enough, you can spin two wheels indefinitely. Link to comment Share on other sites More sharing options...
frkkevin Posted July 5, 2009 Share Posted July 5, 2009 my rears have been wearing quicker than my front.. so it makes sense 512whp/465ftlb 2005 5EAT Legacy (Build Log) Videos - - Link to comment Share on other sites More sharing options...
tangcla Posted July 10, 2009 Author Share Posted July 10, 2009 my rears have been wearing quicker than my front.. so it makes sense I don't think that's due to having a RWD dorifto machine... probably poor alignment or you just push it hard around corners. Link to comment Share on other sites More sharing options...
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