Unless something changes, the diagnosis is in. It's not the electronic steering, it's the worn out rack & pinion system it's trying to push back & forth. Yeah, I guess 40k miles is a reasonable amount of time to wear out, compared to those Alabama Korean and Indiana Japanese economy cars costing less than my $50+k Lincoln MFF (Mexican Fancy Fusion). Estimate is $3780-ish plus tax.
Guess 40K miles is the expected time for a nice bill on well-maintained Ford products now? My "E350 XLT Super Duty" 9 passenger van needed upper and lower ball joints at 40k miles. It normally has just the 2 front captains chairs in it, and 2x a year, a golf cart. I've had somewhere around a dozen Ford products since 1974 or 1975, with diminished satisfaction except for better rust protection with each successive.
(I take full responsibility for the 1967 Mustang fastback 2+2 I bounced off two trees and totaled in '74.) ?