Gear change and Speedometer
I changed to the 4:30 rear and the speedo and mileage were off 10%. Note that the original rear was a 3.91 (automatic). To check mileage error (BTW the reading will be higher), drive on the highway and start your count at a miler marker. Record your starting odometer reading and drive 10 miles. Record your odometer reading. If you see 11 miles, your off 10%. Your speedo will also be off. Your actual speed will be lower than what your speedo says. If I want to drive at 65, I need a speedo reading of close to 72 mph.
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Has anybody installed this product?

