FWIW ... my SM420 (paired with a 261 and running 17 in wheels and a 4.11 rear) in my '49 1-ton is quiet, even cruising at 65 MPH. I only hear a little noise in 1st gear and reverse. My truck is a low-mileage (probably less than 75k miles) 1-ton. Its had nothing but mineral oil in it since it was built.


~ John

A kid raised on Hotwheels, Matchbox and Tonka cannot be reasonably expected to own only one vehicle as an adult.

1949 Chevrolet 3804
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