The controversial Parramatta Light Rail is facing fresh drama with problem trams taken out of service, track issues forcing speed restrictions and passengers abandoning the troubled network.

Insiders have told 7NEWS that wheels and track problems have forced drivers to slow down on the western Sydney network, which cost $3 billion and hasn’t yet been open a year.

Of the 13 trams in the Parramatta fleet, three are currently out of action receiving repairs.

“Sometimes we have to put in speed restrictions because of some temporary defect,” a source revealed, describing serious wear and tear on the tracks.

Speed reductions are in place to help with wheel grinding and flat spots, which drivers say is “due to a design issue.”

“A couple of them at the moment are receiving minor body repair

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