At least on BRC, the TR2 (NW2) sets and TR4 (SW7) sets had a solid drawbar instead of couplers between the cow and calf.
Nothing really unique about MU connections on the SW -7. Total of 4 air hoses on each corner .. one main reservoir, one actuating, one application and one for MU air sand. One 27 pin MU jumper . Add walkway chains, drop steps or platform steps and you got it covered .
Our community is FREE to join. To participate you must either login or register for an account.