Shifting issues? Anyone????

I have an 07 4 dr trd sport long bed .I have a downey coil over lift kit ,285s on 17'' rims ,k&n air filter ,Banks monster exhaust. Can anyone tell me why my truck wont shift into fifth until like 90 mph or close to red line .And does any of these parts make a difference.I know in my ford i just lift the pedal a little then back down and it shifts.I know my taco is no ford but wtf??? anyone with any usefull info on this topic is greatly appreciated thanks Tim.

 

almost sounds like internal problem.lots of people on here running your tire combo and i havent heard/read anything about this issue.maybe low on tranny fluid???????.or a sensor/map problem.not a 100% sure.

 

just had my 30,000 mile service done @ the dealer dont they check that?? i dont want to go back to the dealer they hate my lift.

 

well the tranny is factory sealed ie:no dip stick so i would say no they didnt check it and not reccomened to b changed until 100,000 miles.