dkelly701 Posted November 21, 2018 Share Posted November 21, 2018 I have a 2010 Legacy. I was getting a state vehicle inspection today and noticed something that seemed wrong. The inspector had the wheels off of the ground on a lift checking for play in the wheel bearings. I noticed when he spun 1 front wheel the opposite front well spun in the opposite direction as I expected. When he spun the back wheels, the opposite back wheel did not spin at all. Is this normal for the Subaru AWD system? Link to comment Share on other sites More sharing options...
cww516 Posted November 21, 2018 Share Posted November 21, 2018 If you have a CVT automatic, I believe it is- according to the service manual, the transmission uses hydraulic pressure to engage the transfer clutch (connects the output shaft of the transmission to the driveshaft powering the rear wheels), and it's supposed to be open in park, neutral, or when the throttle plate is fully closed. The test procedure says to have the car on the ground when testing clutch pressure, which would lead me to believe that the pump is engine-driven (rather than ground driven), so it'd make sense that you wouldn't have pressure with the car not running. With the transfer clutch open, you could spin one wheel, and the other one could stay still while the driveshaft spins freely. On the other hand, if you have a manual transmission, that's not so good. Link to comment Share on other sites More sharing options...
dkelly701 Posted November 21, 2018 Author Share Posted November 21, 2018 Yes, sorry, it is a CVT. I believe the car was in neutral with the engine running. If you have a CVT automatic, I believe it is- according to the service manual, the transmission uses hydraulic pressure to engage the transfer clutch (connects the output shaft of the transmission to the driveshaft powering the rear wheels), and it's supposed to be open in park, neutral, or when the throttle plate is fully closed. The test procedure says to have the car on the ground when testing clutch pressure, which would lead me to believe that the pump is engine-driven (rather than ground driven), so it'd make sense that you wouldn't have pressure with the car not running. With the transfer clutch open, you could spin one wheel, and the other one could stay still while the driveshaft spins freely. On the other hand, if you have a manual transmission, that's not so good. Link to comment Share on other sites More sharing options...
AWDFTW Posted November 21, 2018 Share Posted November 21, 2018 Normal. Link to comment Share on other sites More sharing options...
fedaykin Posted November 21, 2018 Share Posted November 21, 2018 Probably why the CVTs can't overcome this: Link to comment Share on other sites More sharing options...
FLlegacy Posted November 22, 2018 Share Posted November 22, 2018 Are you sure. I've seen the roller test multiple times being passed by Subarus even with the cvt. Sent from my SM-G965U using Tapatalk Link to comment Share on other sites More sharing options...
dkelly701 Posted November 22, 2018 Author Share Posted November 22, 2018 Thanks Link to comment Share on other sites More sharing options...
fedaykin Posted November 23, 2018 Share Posted November 23, 2018 Are you sure. I've seen the roller test multiple times being passed by Subarus even with the cvt. Sent from my SM-G965U using Tapatalk Yeah I saw that as well, which is strange. Subaru should slap torsen diffs front and back. Link to comment Share on other sites More sharing options...
FLlegacy Posted November 23, 2018 Share Posted November 23, 2018 Yeah I saw that as well, which is strange. Subaru should slap torsen diffs front and back.The Tribeca does extremely well with the torsen center diff, but I'm sure cost and consumer ignorance play a big part. Sent from my SM-G965U using Tapatalk Link to comment Share on other sites More sharing options...
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