Hello All,
 
	             I am new to this forum, I have a 2ltr insignia on a 2012 plate with a gearbox issue that getting worse.
 
	What happens is - when cold the gear box runs and changes correctly but when it gets warm I have an issue pulling off, when I take my foot off the brake the car is stationary for a couple of seconds then shunts off as if somebody has hit me from behind, but if I put into neutral at the next junction then but into gear it pulls off properly. 
 
	Also it has stated when cold to high rev and not change gear properly until I easy off the revs, generally the car runs well on a run.
 
	Would any body have any ideas please?
 
	I have changed the oil in gearbox twice now without improvement.
 
	Do we think it requires new gearbox and from whom - any recommendations please.
 
	I thank you all for your help in advance.
 
	John