Due to the absence of specific plot details or character information for 'Crackdown', an evaluation of its portrayal of LGBTQ+ characters and themes cannot be conducted. Therefore, the film's net impact on LGBTQ+ representation is undetermined.

The film 'Crackdown' (1988) is an action/crime movie centered on drug enforcement operations. There is no evidence from widely available plot synopses, cast details, or critical reviews to indicate the presence of transsexual characters or themes within its narrative.

Information regarding the film 'Crackdown' directed by John Garwood is not available in sufficient detail to determine if it contains scenes where female characters defeat male opponents in physical combat.

The 1988 film "Crackdown" appears to be an original production, not an adaptation of existing source material or a depiction of historical figures. Therefore, no characters had a pre-established gender that could be swapped.

The film "Crackdown" (1988) is an original production and not an adaptation of pre-existing material with established characters, nor does it feature historical figures or legacy characters from a prior canon. Therefore, no characters exist whose race could have been swapped.