Hey all,

I've been rehabbing a Suwanee Special Big Hauler. My understanding is that's a version 4 chassis (hump in center between drive wheels).

This thing was pretty worn out and I'm working to convert it to battery for an outdoor layout. I pulled out the old rusted/seized motor and ordered a replacement motor from the Bachmann store (link 1). Unfortunately the worm on the new motor doesn't reach the teeth of the version 4 drive gear.

I'd rather not purchase a new chassis if I don't have to - does anyone know where I can get a motor or worm that would fit the version 4? I'm kicking myself for throwing out the old motor - probably could have harvested that worm!

I considered purchasing the wheelset (link 2) or motor assembly (link 3) from the store, but both specifically say they are for version 5 which I assume won't work with my center hump.

Link 1
https://estore.bachmanntrains.com/index.php?main_page=product_info&cPath=69_671_148&products_id=574

Link 2
https://estore.bachmanntrains.com/index.php?main_page=product_info&cPath=69_671_148&products_id=6021

Link 3
https://estore.bachmanntrains.com/index.php?main_page=product_info&cPath=69_671_148&products_id=14915