Speedometer when changing gear ratio
01-25-2011, 09:07 AM
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Speedometer when changing gear ratio
I'll be swapping my built-up front and rear axles into my newly cummins powered motorhome. The donor vehicle had 3.54:1 and the motorhome has 4.56:1 currently. The new set of axles going in are 4.1:1, along with 19.5 Rickson wheels and 33-inch tires. The motorhome now has the 5.9/47RH/NP241.
Question: Is there an adjustment that could be made at the back of the instrument cluster to adjust for proper speedometer reading? Or the transfer case sensor/tonering has to be modified?
Question: Is there an adjustment that could be made at the back of the instrument cluster to adjust for proper speedometer reading? Or the transfer case sensor/tonering has to be modified?
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