Load carrying adaptor for a transmission jack

An adaptor for a transmission jack of the type having an adjustable platform on the upper end of the jack for supporting a transmission, said adaptor comprising a centering block mounted on the platform, an outer plate assembly mounted on the platform and having a centering slot in one end aligned with one side of said centering block on the platform, an inner plate assembly having a centering slot in one end mounted for reciprocal movement in said outer plate assembly with the slot aligned with the centering block, said centering block including a groove on the bottom of each side, said slot in said inner plate assembly being aligned with said grooves to maintain said inner plate assembly in alignment with said centering block, a support bar mounted on the other end of each of the inner and outer plate assemblies, a pair of fixture assemblies mounted on each of said support bars, each fixture assembly including means for supporting the transmission and means operatively connected to each of said inner and outer plate assemblies for moving the inner and outer plate assemblies simultaneously toward and away from said centering block to increase or decrease the distance between said support bars to accommodate the length of the transmission.