This gearbox is the latest development of a Type 9 Sierra gearbox. All gears are supported with needle roller bearings allowing revs unheard of for a Type 9; up to 10,000rpm continuous! The gear ratios are: 1st 2.48, 2nd 1.61, 3rd 1.225, 4th 1.1, 5th 0.87. The gear tooth profiles are much larger than Ford original spec and are similar to a typical straight cut gear. The amount of engine torque this gear kit can be used with is about the same as a typical straight cut gearset. The gears are cut to an angle of 25 degree’s this means there is more than one tooth driving at any one time which is stronger than one at a time as in straight cut gearboxes and also 95% quieter. They are also gear shaved after gear cutting to perfect the gear form. In other areas the gear train has been lightened the benefit of this is enhanced syncro life and a potential faster gear change. The layshaft uses the V6 style roller bearing further enhancing the durability of this box. Sold outright no exchange needed. These boxes look like brand new with cases blasted and painted new bolts and washers used throughout. Includes new quick shift gear lever.