Hi there when i had my car MOT they tested the front break's on two roller's and then the back one's is this safe to do this on AWD, im new to AWD can anyone help please, your's Tony01.

 

No its not a good thing to do, especially if your car has the vicious coupling diff.
All 4 wheels are driven, if you force 2 wheels to drive the other 2 will try to drive also, this (by the looks of what they did) will put harsh strain on your diffs.
Brake tests on a 4x4 should be done on the road if a 4wd rolling road is not available.

Tony

 

Thankyou Tony for the info i have a uk300 2001 so am not sure what type of diff the car has got , your's tony01