gearbox

My 97 1.9 Z3 does a fair bit of motorway mileage but at 70mph/3000rpm it is clear that an extra cog would be nice. Has anyone fitted a 6 speed gearbox? If so, what vehicle did it come from, how much did it cost and most importantly, was it worth it?

Having just 'learned' to change engine oil, filters and spark plugs I'm now turning to the gearbox and diff oil. The gear change on my 2.8 is rather clunky and as I have no idea if it has been changed or not I think this might be worthwhile. But my question is this....although there is a...