Adaptor for use in a flywheel and transmission assembly

An adaptor for use with a transmission clutch housing whereby said housing may be attached, selectively, to one flywheel housing which defines a first bolt circle pattern, or to another flywheel housing which defines a second bolt circle pattern, said first bolt circle pattern having a substantially larger diameter than said second bolt circle pattern;

• said transmission clutch housing defining said second bolt circle pattern;
• said adaptor including a first portion defining forward and rearward axially spaced apart surfaces, said forward surface defining an imaginary transverse mounting plane and adapted to be disposed in engagement with a mounting surface defined by said one flywheel housing, said first portion defining a plurality of bolt holes defining said first bolt circle pattern, and adapted to be connected to said one flywheel housing;
• said adaptor further comprising a second portion defining forward and rearward axially spaced apart surfaces, and means interconnecting said first and second portions;
• said adaptor being configured such that said second portion thereof is adapted to be disposed within said one flywheel housing, and said rearward surface of said second portion of said adaptor coincides with said imaginary transverse mounting plane;
• said second portion defining a plurality of bolt holes defining said second bolt circle pattern, and adapted to be connected to said transmission clutch housing, whereby the relative axial position of said transmission clutch housing and said one flywheel housing is adapted to be substantially identical to the relative axial position of said transmission clutch housing and said another flywheel housing.