conway stayed close by fittipaldi as braun got the no. 54 core car past the latter to regain one of its laps. conway could not pass his teammate to regain first overall. midway through the 19th hour, conway was called to pit road for a similar cooling issue that hindered the sister no. 5 car; he kept second because paul di resta's no. 32 united autosports car had a clutch pressure problem that temporarily prevented him from leaving pit road. he lost three laps to fittipaldi. the no. 11 grasser lamborghini took the lead in gtd after trading the position with the no. 33 riley mercedes-amg for the past few hours. meanwhile, teams scheduled their final pit stops and prepared their fastest drivers for their last stints. the leaders of two of the three categories were close by each other without over risking. overheating concerns slowed nasr and fell to third behind loïc duval's no. 54 core car. nasr retook second when duval made a scheduled pit stop by the end of hour 22.