Just purchased 2.7crd Grand Cherokee Very Happy with Diesel engine and 5 speed auto, travelled only 5000 Klms. Quadra Trac II does not hold up to expectations. This vehicle purchased in Australia and only comes with Quadra Trac II.
The problem is that while doing sand or beach work the Gearotor Coupling in the NV 247 transfer case is to slow to transfer power to all wheels. This allows vehicle rear wheels to bury themselves before the front engages.
Using low range the vehicle is unstopable as this locks the centre diff, but is restricted to 25mph. So as to change back to 4Hi you then have to slow. The change itself has to be done smooth and slow, if rushed the 5 speed auto when put into drive will not engage. By this time the vehicle has now come to a stop.
Once moving in 4hi the vehicle is excellent providing you don't have to stop. Otherwise the vehicle soon burys itself even in the easiest of sand conditions. Its as good as a 2wd car.
Is there a fix for this Gearotor coupling to speed it up, or can the 4lo diff lock be modified to work in 4Hi for take off and once moving disengage back to normal 4Hi.
Vehicle: Graphite Grey 2.7 Crd Laredo fitted with OME suspension, Cooper A/T 255/70-16, Long Range Fuel Tank, ARB Bull Bar, IPF spots,Counter-Act Electronic Rust Prevention.