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#21
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I have a 99 gc with quadratrac II and have noticed that the full time does
not perform well form a cold start. I have assumed that the "fluids or hydrolic system" needs to warm up to operating temp before the full time will work well. After driving only a mile I see a marked improvement in traction. At the same time if I shift into part time I recieve solid traction even from a cold start. All of this is when starting cold from my driveway turning onto a snow covered 7% grade road. To test this I have tried driving out of my driveway immediatly after returning home in full time. jimo "Richard" > wrote in message ... > this is curious...'(quote the posted article)'... > > "Finally, a full-time 4x4 system like comes on most Grand Cherokees and > some > Cherokees and Liberties 'couples' the front and rear axles together, but > they are not mechanically locked together like a part-time 4wd system > does. > The coupling can be done via either a differential (just like what is > between the left and right tires) or a fluid (viscous) coupler. The > benefit > to a full-time 4wd system is that because the front and rear axles are not > mechanically locked together, the front and rear tires/axles can rotate at > different rpms from each other. This allows a vehicle with a full-time 4wd > system to drive in 4wd "full time" on a paved road without problem since > there is no 'wind-up' problem to harm the drivetrain."... > > I was driving in some fresh snow today, packed/loose mixed... and as > usual, > I used my "Full Time" 4WD, but I (unusually) was slipping a bit on a very > steep hill and sharp corners and tried "Part Time" and it seemed to work > better. So what gives? I thought "Full Time" was supposed to be better. (I > would never use the "Part Time" on dry pavement) > |
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#22
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This is an excellent explanation of 4x4
http://auto.howstuffworks.com/four-wheel-drive.htm also make sure to read up on differentials work: http://auto.howstuffworks.com/differential.htm HYFTH, Chad "Patrick" > wrote in message ... > Last night got a bit stuck in a big snow bank, Selectrac I6 4x4, i was on > full time > > The rear right (passenger) wheels was spinning and it feel it was the only > wheel really trying to get out, i know the 4x4 is working (Light on and > feeling while doing u-turn ) but why i did not see the front wheel > spinning while the gc was on Reverse , I was outside with the truck engage > looking at the truck spinning. !!!!! > > I tried part time and no much luck. Got out of there with time and > patience REVERSE,DRIVE,REV... Is AWD subaru vehicules working the same ? > > thanks > > Pat > > |
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