Help! Lionel Coupler Problems

I have two F unit Legacy ABBA sets. Milwaukee and Rio Grande. Both power B units uncouple randomly. One is at lionel now. Most of the couplers with both sets were extremely sticky and hard to close. I used graphite lube and pushed closed and used cab2 to open many many times before they started to work fairly decently.

I am not sure what you mean by train 1 etc… question But what I did was to give each unit a separate ID # then use the  "build" train function. Then I give the whole consist a separate "train #" to address the 4 unit consist. Make sure all units are oriented in the correct direction when they are on the track and in the "build" function on the cab2. When I do it this way and address the "train" id and the rear coupler button on the cab2 the front coupler on the last dummy A unit opens because its considered the end of the 4 unit consist.

  On my Milwaukee rd ABBA if I keep slightly below the Legacy "Normal" speed the B unit won't uncouple. If you have jerky operation at slow speeds your brake detail is rubbing your traction tires. Hope this helps 

MikeMike, sounds just like mine. I will give all that a try and let you know. Thanks a lot. Paul