Just bought a 2010 with 28000 miles. Has anyone installed a tuner or power adder for the diesel? Sprinterstore offers one. Tuning Module
My 2010 likes to downshift when climbing a hill. I have a 2005 Dodge with a cummins and it also liked to downshift when climbing a hill. That was with a 4000lb trailer and about a 3000 lb car in it. With a Smarty JR it no longer downshifts pulling that weight. Just a good steady pull. Much more driveable pulling a load. That has to be much esier on the transmission. I'm not talking about towing the trailer here. Just want to climb a hill and not downshift.