• This series of buses is powered by the Detroit Diesel 6V92TA engine and the Allison HT-(748??) 4-speed transmission. These models have square edges around the front door glass mounts.
 

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Ride-On 5504 is seen on the 34 Wheaton entering Wheaton Metrorail Station.

Ride-On 5508 is seen on the 12 Takoma at Silver Spring Metrorail Station.

Ride-On 5508 is seen Not In Service on Ramsey Avenue in Silver Spring.

Ride-On 5510 is seen on a special shuttle bus trip at Silver Spring Metrorail Station due to bridge construction on Wayne Avenue.

Ride-On 5517 is seen Not In Service on Wisconsin Avenue in Friendship Heights.

Ride-On 5518 is seen on the 56 Rockville at Lakeforest Transit Center in Gaithersburg.

Ride-On 5518 is seen on the 56 Rockville leaving Lakeforest Transit Center in Gaithersburg.

Ride-On 5520 is seen on the 48 Rockville leaving the east side of Rockville Metrorail Station.

Ride-On 5523 is seen on the 59 Montgomery Village on the east side of Rockville Metrorail Station.

Ride-On 5525 is seen on the 49 Glenmont leaving the east side of Rockville Metrorail Station.

Ride-On 5527 is seen on the 46 Medical Center leaving the west side of Rockville Metrorail Station.