Testing and development don’t stop just because a given model has been unveiled. Case in point: the new Ford Super Duty pictured here.

Dearborn unveiled its latest workhorse over a year ago, and has since put it into production – complete with aluminum bodywork and as much as 925 lb-ft of torque, giving it a towing capacity up to 32,500 pounds. Deliveries have been delayed due to supplier issues, but that hasn’t stopped the Blue Oval automaker from forging ahead with testing.

In these latest reader-submitted spy shots, you can see the new professional-grade F-Series undergoing testing in the Rocky Mountains of Colorado, where we’ve recently spotted everything from Land Rovers to Corvettes. Given that the model in question has already been seen in full, Ford could do without any camo for this round of testing – which also tells us it’s not presently working on any further (visual) upgrades.

Nor should it have to: though pickup truck sales are declining at present, the Ford F-Series remains the undisputed market leader, far outselling the Ram trucks (spied testing with new Cummins diesel power at the same location) and even the combined tally of the Chevy Silverado and GMC Sierra twins – never mind the “imports” (including those made in America by foreign automakers).

In fact, if you add up all the Toyota, Nissan, and Honda pickups (of any size or capacity) sold in America last month, they’d still wouldn’t be enough to rival any of the domestic full-size trucks for market leadership.

Our hat goes off to Brett Borgard for capturing the action!

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