Automotive transmission two-shaft nut/two-shaft bolt tightening assembly

The invention discloses an automotive transmission two-shaft nut/two-shaft bolt tightening assembly which comprises a foundation tightening assembly, a two-shaft bolt tightening sleeve, a tightening connector and a nut rotation-preventing sleeve. The foundation tightening assembly comprises a base with an installing sleeve, a tightening shaft supported to the installing sleeve, a spring located inthe installing sleeve and a flange rotation-preventing limiting base in sliding fit with the installing sleeve; the two-shaft bolt tightening sleeve is selectively and detachably connected with tightening shafts; the tightening connector is selectively and detachably connected with the tightening shafts, is provided with a spline housing and is matched with two-shaft splines; and the nut rotation-preventing sleeve is selectively and detachably connected with the flange rotation-preventing limiting base. According to the automotive transmission two-shaft nut/two-shaft bolt tightening assembly,a traditional tightening