Tf2 kit questions on a 904

had a tranny shop rebuild my 904 and do the tf2 while they were at it a while ago. I have a ratchet shifter and haven’t been able to get the 1-2 shift to be quick like the 2-3 shift. I took out the valve body today and was looking things over to see if there was an issue and I found the tv spring was incorrect per the tf2 instructions and the “B” section of my 1-2 governor valve not ground. I’m to grind that down per the instructions but the instructions say to use the yellow or pink spring for the tv, why do you choose one or the other? Thanks