After 10mins stopped good boost

[in2trux]

(08-24-2016 )Frank8065 Wrote:  Thanks for the reply,it does have original programming in it, i had never heard of the different modes(city - hwy etc etc), but yes, it only boost 38 for a short period of time normally up to last high gear and thats it, once you down shift it only produces 28-30 psi

Do you really need to push it that hard or just looking for normal?
We try to keep it under 30 pulling heavy on grade even though it will go 38-40 max.