Does a board from any other Bachmann loco fit the 44 toner? The board that is in it requires soldering or a plug that has 8 pins in line! The 44915 decoder is the normal 4 over 4.
I don't know if the 70 tonner chassis would fit under a 70 tonner. It might, seeing as they were both made by GE and may have similar lengths...
Use the PCB in the locomotive.
Cut both capacitors.
Install any small decoder by soldering. Example -- click http://www.tcsdcc.com/decoderpics/Bachman%20GE%2044%20Ton%20Diesel%20Switcher/Bachman%20GE%2044%20Ton%20Diesel%20Switcher.htm
I don't know if the 70 tonner chassis would fit under a 70 tonner. It might, seeing as they were both made by GE and may have similar lengths...some one has my problem. They need to read and reread what we type before hitting post.