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Old 11-09-2002, 12:06 AM
MRieger
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Additional information:

4EAT w/VTD & Sport shifter plus buttons on steering wheel:
Fitted to Legacy B4 twin turbo
F:R 45:55, asymmetric epicyclic differential with computer hydraulic control will change to 50:50 with slippage. All sorts of torque splits possible with the TCU and wheel slippage. No fuse because it's a mechanical direct connection to all wheels.

http://www.webwombat.com.au/motoring.../10_06_sub.htm See B4 article, personally I prefer the BBS wheels.
http://www.autoweb.com.au/cms/news/n...doc=sub0207011 cut down version of same article, only small one pic too

This was done for more of a rear drive feeling and you can use the power to steer in corners like a RWD and will then transfer drive forward to get you out of trouble. When changing with the steering wheel buttons it will not change unless the engine is capable of operating in that range and there is an additional solenoid valve to enable engine braking in 1st gear bypassing the over running clutch that is normally in any automatic transmission. This transmission is as close to driving a manual as you can get without having one. Still waiting to test drive one.

Same ratios as SVX but different final drive, depending on where it is sold could be 4.111 or 4.444. It is also capable of taking the SVX’s torque.

Also worth noting the 4EAT VTD/VDC transmissions are completely electronic, all gear changes and slippage between gears is mapped in the TCU and compensated for as the transmission wears. Turning it into a digital transmission, either it work or it doesn’t, there’s no in between.

VTD is not able to be fitted to manual cars because it uses the auto transmission pump. I believe a similar system is in the WRC cars, but they use a pump in place of the ABS system to regulate all differentials.

The manual transmission in the B4 allows the tail to be powered outwards, much more so than the 50:50 would suggest. But I haven't seen any literature stating it is 50:50, seat of pants suggest otherwise. Easy to drive, power, stable, with little understeer and easy to power oversteer but I guess that's what Porsche built in when they did the Bilstein shocks and twin turbo system. Tyres still feather if you go in too fast.

Choose one of the above transmissions they are the closest match subaru makes to the EG33. BTW the auto B4 has better highway fuel consumption due to taller ratio and lower cruise rpm.
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