I used an A4LD shifter (Stamped right on it) on my FM146 without modifying it. The A4LD, M50D, and FM146 trannys are all the same length(28.687") hence the shifters are interchangeable when using the BW1350 case and I'm assuming the BW1354 is no different. I've also used a C4 shifter on a TK4 and they work with no modification as both trannys are 24" long. The TK5 is 25.937" and the FM 145 is about 26.5" so I would bet they too would interchange. Every shifter I have has the tranny stamped on it, but as long as the tranny you are using is the same length as the tranny the shifter came off you can use it. RB