a torsen-style transfer case uses gears that are similar to a truetrac differential.
a torsen-style transfer case uses gears that are similar to a truetrac differential.
a torsen-style transfer case uses gears that are similar to a?
truetrac differential
Na
Na
a notable feature available in this generation was the automatic four wheel drive option called "quadra-drive", which employed the new venture gear nv247 transfer case. this two-speed chain-driven transfer case uses a gerotor, a clutch pack coupled to a hydraulic pump, to transfer torque between the front and rear axles. the transfer case contains three modes, 4-all time, neutral, and 4-lo. in 4-all time, 100% of torque is sent to the rear axle in normal conditions. if the rear axle starts spinning at a higher rate than the front axle, hydraulic pressure builds up in the gerotor and causes the clutch pack to progressively transfer torque to the front axle until both axles return to the same speed. neutral mode is intended for towing the vehicle. in 4-lo, the front and rear axles are locked together through a 2.72 reduction gear ratio. the nv247 transfer case is mated to front and rear axles containing jeep's vari-lok differentials. vari-lok differentials also use a gerotor to transfer torque between the wheels on either side of the axle. the major advantage of quadra-drive was that the combined transfer case and progressive locking differentials in each axle could automatically control traction between all four wheels. however, only the center differential could be permanently locked, and only in 4lo. the quadra-trac ii system included the nv247 transfer case with the standard open front and rear differentials.
jeep grand cherokee (wj)