Posted by PretendFarmer on February 25, 2014 at 08:44:13 from (192.249.47.208):
In Reply to: 3.73 or 4.10 posted by The tractor vet on February 25, 2014 at 07:14:04:
The tractor vet said: (quoted from post at 16:14:04 02/25/14) Well i really don't know much about the Chebby diesels as to where there torque range is so it is hard to say. As for a Cummins your best bet would be 3.54 to 3.73 as the 4.10 gears plum SUCK. Here your area of driving and road speed come into play . You want to keep a diesel in it's working range not up against the gov. only the old 2 cycle Detroits needed to work wide open to make power . Nobody really looks into this when buying a new truck , they see one setting and just buy it then complain that this truck will not do what i want. or my fuel mileage is not what they told me . Case in point here my old Dodge is a Cummins five speed with the 4.10 gear , You are NOT suppose to TOW in O/D since the transmission was of poor design , so ok ya do all your towing in forth at flat out up against the pump at STOCK setting of 2650 on a 235-85-16 tire that relates to 56 MPH flat out . Not a good thing if your trying to run the big road . But for grandpa on the back roads 45-50 is fine . Now put that 4.10 gear in a higher reving engine where the torque range falls in the 3200-3400 RPM range then it is a great choice like with a 460 Ford gasser and now your road speed it in the mid sixty's with the same transmission and tire size . Just take a moment and think of what your going to do with the truck 90% of the time and set it up for that and live with the rest.
I tow in 5th. Just dont lug it, and I never consistantly push over 20psi in 5th. Rpm's drop below 1700 I drop to 4th. When towing I often dont shift to 5th till 60. Driven properly, you can tow with a NV4500 in 5th for a long time.
This post was edited by PretendFarmer at 08:45:30 02/25/14.
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