Document ID: chunk:federal_register_of_legislation:F2006L01279:body:0:p7
Version: federal_register_of_legislation:F2006L01279
Segment Type: other
Provision Reference: 
Character Range: 20359–22957

50 km/h,
or
VA = 50 km/h.
and within the specified range of +5, -1 km/h of that speed for each test.
2.3.2.3.2 Choice of gear ratio.
2.3.2.3.2.1 Vehicles of categories MA and NA fitted with a gearbox having four or less
forward gears shall be tested in second gear.
    Vehicles of categories MA and NA fitted with a gearbox having more than four forward gears shall be tested successively in second and third gear.  The average value of the sound levels recorded for these two conditions shall be reported. However vehicles of  category MA having more than four forward gears and equipped with an engine having
    'NEP'  140 kW(ECE) and a permissible maximum power to maximum mass ratio   75 kW(ECE) per tonne shall be tested only in third gear, provided that the speed at which the rear of the vehicle passes line BB' in third gear is greater than 61 km/h.
    Vehicles of categories other than MA and NA whose number of forward gears is X (including those obtained by way of an auxiliary transmission or a multi-gear axle) will be tested successively with the gear selection equal to or higher than X/2. The condition giving the highest noise level shall be reported.
2.3.2.3.2.3.1  If the ratio X/2 is not an integer, the next higher gear shall be selected.

2.3.2.4  Vehicles with automatic transmission.
2.3.2.4.1  Vehicles without a manual selector.
2.3.2.4.1.1  Approach speed.
    The vehicle shall approach the line AA' at various uniform speeds of 30, 40 and 50 km/h (or at 3/4 of the maximum on-road speed if this value is lower). The condition giving the highest noise level shall be reported and within the specified range of +5, -1 km/h of that speed for each test.

2.3.2.4.2  Vehicles equipped with a manual selector.
2.3.2.4.2.1  Approach speed.
The vehicle shall approach the line AA' at a steady speed corresponding to either:
NA = ¾ S and VA  <50 km/h,
or
VA = 50 km/h and NA < ¾ S
and within the specified range of +5, -1 km/h of that speed for each test.
    However, if during the test, in the case of vehicles having more than two separate gears, there is a down-shift to first gear, this down-shift may be avoided at the 'Manufacturer's' choice either by:
increasing the speed of the vehicle VA to a  maximum of 60km/h,
or
    maintaining the speed VA at 50 km/h, with the fuel supply to the engine limited to 95 per cent of the supply necessary for full load.[2]
2.3.2.4.2.2  Position of the manual selector
    The test shall be conducted with the selector in the position recommended by the 'Manufacturer' for normal driving.
2.3.2.4.2.3  Auxiliary gears.
    If the