Which of the following statement are not part of a procedure to test a differential operation after replacing lubrication oil?

a. During a test drive make a sharp turn left and right to check and listen for noise, vibration and smooth cornering.

b. Submerge one side of the wheel in mud and check if LSD transfers the torque to another wheel.

c. Test drive on a freeway to listen for noise during high-speed rotation.

d. De-accelerate and listen for noise.

e. Perform road tests on both uphill and downhill

f. Check coolant temperature of the engine in case of differential heat being transferred to the engine.

g. If the vehicle has a switch for four-wheel-drive clutch system, engage the four-wheel drive and test its operation.

h. After testing has been completed, place the vehicle on the hoist and check for leaks.

i. Use a laser thermometer to check for any hot areas, such as pinion bearings.