yes diesel and gasser zf are different.bellhousings are different between the 2.you should be able to find a donor truck for 2000.00 or less though.i know throw the junkyard the zf was about 1500.00 for my truck.wich is why im glad we got a parts truck in.all i had to find was the correct clutch pedals,and hydraulic setup and front half of my drive shaft.