hey was wondering if anyone could tell me whats wrong and how i can fix it

ok my 120y is an auto and from last week something very wrong has been happnin it doesnt go into second gear untill 80kph and doesnt go into third at all! and yeah not good!

any help would be excellent

sounds like vaccum leak or blockage. the computer is receiving a signal that the engine is under load, even though it may not be, the manifold pressure lines (vacum lines) are sending a faulty pressure, this means the box wont change until there is "enough speed for it not to stall" or so it thinks.

Take off every little hose on the manifold and put it back on with some sealent or something that will prevent leaks in the future. throw away any with visible damage or cracks.

Did these things run throttle posistin sensors? it could be that aswell. but not sure

120Y autos are a full hydraulic unit - no electrics at all. some may have an elec kickdown.

but ronald is spot on there - vacuum leak. replace all hoses and make sure they're all nice and ticht and see if that makes a difference.