Vss incorrect read.

Hi I am new to this tuning platform.only my first LS.I have got a base tune in the truck that functions(still rich when it cools down on street drive but tuneable).My issue stems from the VSS reading double my speed.I inputted my tire height and gear ratio(28 height,3.73 rear gear) it is a 2007 chevy 5.3l with a 4l60E and a 2800 stall converter) the whole thing is in a 90 chevy 1/2 ton.I tried adjusting per km setting but it made little difference.I set limiter to 255kmh initially but max I can get is 122 kmh and this gets to it fast.Also obviously the trans is confused.It stays in 4th for 90 percent of a drive with 0 shifting really Or its so soft I can't feel it.Trans is supposed to be built and I know the builder.I know high stalls lower shift feel but this had non.We had a TPS issue and fixed it which resulted in better running.I am currently on map no maf till we get sll tuned then play with maf.Any help is appreciated.I have logs as well if it helps