FMCSA withdraws its August 27, 2012, direct final rule (DFR) amending the definition of ``gross combination weight rating'' (GCWR) in 49 CFR parts 383 and 390. The DFR would have taken effect on October 26, 2012. However, the Agency received several adverse comments in response to the DFR and will, therefore develop a notice of proposed rulemaking to request public comments on proposed changes to the GCWR definition.