I am wondering if anyone out ther knows if ther is any companies to sell different size plastic gears for the seedometer on a NP241dhd transfer case, I have 4:10 gears and went to bigger tires to get a little higher gear ratio and im running right about what 3:73 gears are compared to with regular size tires, i have 255/85/16 tires and at 60mph im running about 8 mph faster than what speedometer shows, any ideas??

 

GPS and adjust your driving

 

Call ur cummins dealership. I went from 410's to 356 and changed my out.


Brandon

 

u sure your running faster mine is off by 5mph but slower then the speedometer shows

 

bigger tires= going faster i know, a speeding ticket shows......

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at 55 on speedo im about 5 mph faster, at 65 on speedo about 7 to 8, and at 75 on speedo its about 10, i just want my speedo to b a lil closer cause sometimes it slips y mind a lil and wa lahhhh, speeding ticket