I don't think newer combines had that gear box, only the TR70 did. Not sure about the 1400 and 1500's, been a long time sence I looked at one of those. If you need the whole gearbox I would try a salvage yard. If you can rebuild then I would do that. Seems to me that maybe a bubble up auger gearbox from some TR's can workIJ I think sombody told me that once but I am really not sureIJ