The fierce competition between Swedish truck and bus makers AB Volvo and AB Scania in the past has resulted in the two companies using mainly separate supplier bases.
But after last week's SKr60.7 billion (euro 6.99bn) merger, the new commercial vehicle giant will be looking for savings of between SKr4bn-SKr5bn in annual synergies over the next three years. And most of those savings will be achieved by offering suppliers higher volumes in return for reduced prices, according to Lars Holmqvist, managing director of the Association of Swedish Automotive Suppliers.
The fight to win new business is likely in such areas as glass and bearings. Scania buys its glass from St Gobain while Volvo uses Pilkington; Scania buys its bearings from SKF, Volvo buys from GKN.
The enlarged company will have more than 30 percent of the European commercial vehicle market and will be second worldwide behind DaimlerChrysler.
Not only will the supplier base be cut, but some production sites are likely to be closed, Holmqvist predicts.
He believes that Volvo will renegotiate deals as soon as the acquisition has been approved by the European Union.
Renegotiations will also have to wait for the co-ordination working groups to be led by Volvo Chief Executive Officer Leif Johansson, Saab CEO Leif Ostling and Volvo Truck Managing Director Karl-Erling Trogen.
Holmqvist predicts that Volvo's cabin factory in Umea in the north of Sweden probably cannot compete with Scania's better-located site south of Stockholm, while Scania's bus factory in Katrineholm, south west of Stockholm will struggle against Volvo's in Boras, close to Gothenburg.
Cost savings will be made in supply, production and distribution but Volvo chief Johansson is anxious that both will maintain their identity.
Another main area where cost savings will be made is the dealer network.