Ford specs indicate the F53 does not have a governed speed limit option. It list it as not available if one compares the features of the F53 vs F59. Only the F59 shows an option for a fleet speed limit. Interesting distinction they use, but in either case not available in F53. I'm not suggesting you guys are wrong, just that Ford doesn't list it or calls it something else.
Engine speed limits (RPM REDLINE) and vehicle speed limits can be so unrelated due to gearing that controlling one to control the other seems impractical to me. Just my opinion.
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