(18 Apr 2016, 8:53 pm)TEN 6083 wrote The 15 I got on the 7th to Consett (6013) had to take a diversion up Maiden Law bank from Lanchester due to an RTC on the A691, it absolutely struggled to get up there, thought was was going to stop at one point, that's how bad it got.
It's because they have non-lock ZFs which means they are setup for quick gear changes and not locking into gear on inclines, which causes them to climb up the bank in the wrong gear making them sluggish.
Later ones have gear locks
