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I know some of you don’t like to drive your rvs fast, but I wanted to go faster than 55. Truck went 45 at 1400 rpm. got some 3.90s swapped 20 year old dd405 and rd405 4.88s for 2011 dsp41 and rsp41 3.90s. sigh, lost my lockers, but now I can make 55 with another gear left over. 1350 for the gears, 1200 cash to swap, 320$ in oil, 130$ in bolts, and 125$ in u joints. I would have liked to swap them myself, but i was too chicken to pull the yokes and split the u joints without buying 500$ in tools. now on to calibrate speedo, and steering and air conditioning and cruise control and. . .