B&M starshifter query - no manual 2nd?

If second is there when it's in fully automatic drive then it's the shifter.
If second is not there in full auto drive, then it's the trans, and like Fishy says if second is never there at all it's either the front band needs adjustment or it came apart inside.

Also, if you have it in manual second and it just coasts when you let off the gas it is def the band.
(coasts meaning you let off the gas, the engine idles down and it feels like neutral)
Also described as no engine braking.