Short answer, if you're towing your Commander, you need to put the xfr case in neutral or you're likely to damage the automatic transmission.
Long answer: When you tow a vehicle on its drive wheels, the rotating wheels will back drive the driveshaft and it will back drive the xfr case and transmission. Automatic transmissions rely on the engine input to drive their lubricating and pressure pump, so if you back drive an automatic transmission from the driveshaft output, the parts will spin at high speed with no lubrication. Transmission damage will ensue.
If you tow a vehicle, you want to avoid towing it on its drive wheels.
If its a FWD or RWD only vehicle, you lift the drive wheels and tow it on non-drive wheels.
If you must tow a vehicle on its drive wheels (the O.M. will give you guidance to the max speed and distance you can do it without damage) more than the O.M. recommends, you need to disconnect and remove the driveshaft to prevent it from back driving the automatic transmission.
If you have a manual trans, the O.M. will tell you if its permissible to just put the manual trans in neutral.
4WD, you would think would be even more complicated, since all wheels are drive wheels. BUT, many 4WD have a xfr case that can be put into neutral. When you put the xfr case in neutral, it disconnects the drive shafts from the automatic transmission, and you can tow on either or both axles without back driving the automatic trans and causing damage.
Those with QTI, we're screwed, the xfr case can NOT be put in neutral, check your OM, but I "think" you have to have your vehicle towed on a flat bed with all 4 wheels off the ground. OR disconnect and remove the driveshaft on the axle being towed.
If you have a RWD Commander, then follow the advice for the RWD above.
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Last edited by Mongo; 12-11-2014 at 07:08 AM.