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Re: [GMCnet] New Manny Tranny on hills [message #195355 is a reply to message #195354] Thu, 10 January 2013 14:53 Go to previous messageGo to previous message
A Hamilto is currently offline  A Hamilto   United States
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Registered: April 2011
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James Hupy wrote on Thu, 10 January 2013 14:48

Darryl, given the 403's lack of torque below 48-50 mph, I usually manually downshift at about that speed if the top of the upgrade is not in sight.
But with the 3:70 final drive gears, my 403 will not lose speed on anything less than a 6% grade. It is the best performance upgrade that you can make for the money spent.
Jim Hupy
Salem, Or
78 Gmc Royale 403
What we need is a two-speed FD. One ratio for climing hills and another for flatland with a tailwind.
 
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