Car parked at work all day.engine on went to select 1st gear and the gear stick wouldn't move into it nor any other gears. After turning engine off and on a couple of times and trying it went into gear just fine .. it sort of fixed itself and drove fine for hours of driving so i thought maybe just stuck and be a one time thing.its ice cold here. Parked up got back in car after an hour and same thing happened only this time i could force gearstick into gears to get home thought it was really hard to force into gear you could feel tension. Selecting reverse to park you could hear grinding noise when going into reverse. I did notice a while ago it would grind into reverse somethimes even if i was dead stop and clutch right down it would sometimes do it. I thought this was maybe clutch cable stretched? Can anyone help me diagnose the problem please?