Hi guy’s....beend having a big question about back up switch for t18. I swap out my worn out t18 that has the switch getting on side of the sliding gear rod. Now the t18-1b has the switch at the end of the sliding gear rod. There something missing using the back up switch from my worn out t18 in the swapped transmission. I need sone kind of spacer to make contact to the switch ball. Or im not having the right switch.... Please note that my worn out t18 has the reverse gear on right down and the swapped t18-1b has the reserve roght and up.