The three vans come off the same production line at Sevel in Italy, following a co-operation agreement which dates back to 1978.
Some two million models have been sold so far worldwide and more than e1billion has been invested in this upgrade.
Gross vehicle weights will range from three to four tonnes, payloads from 1,000-2,000kg and load volumes from eight to 17 cubic metres.
There will be three wheelbases, four load lengths and three roof heights for the panel van range and four wheelbases and five load lengths for chassis cab versions.
Power from the diesel engines ranges from 100 to 157bhp and torque figures range from 184 to 295lb-ft.
A driver’s airbag and anti-lock brakes will be among the standard equipment list, while traction control will be among the paid-for optional extras.
Further information on the new-look family of vans will be announced nearer to their launch dates later this year.
New Transit pricing revealed
While Mercedes-Benz raised prices on its rival, the new Sprinter, by an average 3%, Ford said its maximum price increase would be less than 1%.
Prices start at £13,150 ex-VAT for the 85bhp front-wheel drive 2.2-litre TDCi and rise to £23,550.