1995 Skoda Felicia regular ticking

last weeks i heard a regular ticking coming from the fron when i drive over 60 km/hr

when i accelerate i hear this ticking when i am over 60 km/hr when i remove my foot from the acceleration pedal it dissapear even if i am over 100 km

i tried to increase the rpm of the motor at rest but no sound
tried to hold brakes and speed up in the 4th transmission .. but no sound

only when i am moving over 60 km i hear this
some mechanics said it could be the coupling
and some said it is the speedometer wire

but i am very confused

thanx