Our DSDP doesn't shift into 6th till about 55 even that's just over 1400 rpm which is peak torque. 62 mph is about 1620 rpm.
It will shift sooner if I use the "mode" setting which lowers the shift rpm's.
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2009 45' Magna 630 w/Cummins ISX 650 HP/1950 Lbs Ft, HWH Active Air
Charter Good Sam Lifetime Member, FMCA,
RV'ing since 1957, NRA Benefactor Life, towing '21 Jeep JLU Rubicon Ecodiesel
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