Crewe station was closed for seven weeks during the summer of 1985 to allow for redevelopment work. This came at the same time as BR was withdrawing the remaining Class 40s. However, due to a lack of motive power for engineering traffic, 40012, 40060, 40118 and 40135 were pulled out of retirement. They were renumbered as part of the ‘97/4’ departmental fleet: 40060 (97405), 40135 (97406), 40012 (97407), 40118 (97408). Crewe’s new departmental ‘40s’ were rewarded with work in the North West. As well as working engineers’ trains, they hauled passenger and parcels traffic. Despite their obsolescence, the four Crewe ‘40s’ continued to be used after the work at Crewe had finished. 97407 and 97408’s careers eventually ended in early 1986, with 97406 succumbing in December. 97405 continued working until March 1987. This departmental work ensured that three of the quartet lasted long enough to be saved for posterity.