High / low range operation needs to be checked, to make sure that the selector holds in gear, and the vacuum -
operated diff lock function also needs to be checked.
Not exact matches
I believe the Jeep with the quadra trac system allowed for vehicle to
operate in two - wheel drive, full - time four - wheel drive (with the center
diff open) and part - time four - wheel drive (with the center
diff locked) in both high - and low - ranges.
An electric pump supplies the VAQ unit with varying degrees of pressurised hydraulic fluid; this oil
operates a pack of clutches that can
lock the driveshaft to the
diff cage, and therefore, essentially, the other driveshaft too.