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Chevrolet Silverado 1500 Forum : “Which is best rear axle?”
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About: 2006 Chevrolet Silverado 1500 LT2 Crew Cab 4WD
Which is best rear axle?
3.73 or 4.10 ratio ... Which one is good for gas mileage ... Which one is good for pulling heavy trailer? ... Thank you ... Jim ... Please email to jbirch1@aol.com
A 3.73 axle will give you the best gas mileage while a 4.10 will do a much better job with getting that heavy trailer moving quickly but will also cost you in mileage as they cause the motor to run at higer rpms when cruising down the highway. 4.10s are normally found in 1 ton pickups and above with dual rear wheels that are designed to handle heavy loads and trailer weights.

