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  #16  
Old 08-10-2009, 08:30 PM
oab_au oab_au is offline
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Re: RHD models have a different gear box!.

Quote:
Originally Posted by NiftySVX View Post
I don't mean to hijack, but I wanted to add something to what you said initially because it is important that all understand the difference between the very good system that is ACT4 dating back to model year 1987.5 which remains much more advanced than what is found on modern models from other manufacturers, though sadly, is horribly inferior to VTD.

While I agree that the binding phenomenon is far less likely in a VTD trans, it should be noted that the ACT4 system is a dynamic variable system, not a passive system like those found on many vehicles. The important distinction is that other vehicles are "passive", meaning they only activate one set of wheels after the others slip. Subaru takes it one step further by keeping the rear wheels are always engaged to some degree, varying on driving conditions (This can be observed by a test drive of one of these vehicles with a line pressure gauge connected to the transfer clutch test port.) Subaru has never had a passive system on a production vehicle that does not drive all 4 wheels at all times, excepting the old school driver switched 4WDs. They do have the passive system that incorporates the viscous clutch pack but it drives in a split of near 50/50.
Yes I agree Nifty, but that was written 7 years ago. The delay that I was referring to then was due to the transfer valve sticking or a loss of pressure to the clutch, that caused the delay.

Yes the pressure is varied with throttle and speed changes.

I was wrong with the binding not being a problem with the VTD, it can and does bind when the valve sticks.

Harvey.
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  #17  
Old 08-10-2009, 08:33 PM
oab_au oab_au is offline
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Re: RHD models have a different gear box!.

Quote:
Originally Posted by subbieatnz View Post
Is this for all RHD SVXs?
Is it the same for Fulltime 4wd auto and AWD auto?
As far as I know it is, though there may be a model, as yet undiscovered that is different.

Harvey.
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  #18  
Old 08-11-2009, 12:32 AM
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subbieatnz subbieatnz is offline
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Re: RHD models have a different gear box!.

Quote:
Originally Posted by oab_au View Post
As far as I know it is, though there may be a model, as yet undiscovered that is different.

Harvey.
Just I noticed my NZ SVX felt like it handeled quite diffently to my JDM SVX
felt like it understeered???
Maybe its something else that made it feel like that? I dont know

Then the Transmisson went funny a few months later on the NZ SVX
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Last edited by subbieatnz; 08-11-2009 at 12:37 AM.
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  #19  
Old 08-11-2009, 01:38 AM
oab_au oab_au is offline
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Re: RHD models have a different gear box!.

Quote:
Originally Posted by subbieatnz View Post
Just I noticed my NZ SVX felt like it handeled quite diffently to my JDM SVX
felt like it understeered???
Maybe its something else that made it feel like that? I dont know

Then the Transmisson went funny a few months later on the NZ SVX
I am fairly sure that the only difference between the JDM and the Euro is the speed sensor position. I haven"t explored looking further, but there must be some reason for them to build two difference systems.
The Euro would be the better for production, and as it does not get the reading through a ratio. So if the final drive ratio is changed, for some other model, the TCU program only has to be told the ratio.

Harvey.
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