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Mod | | | Forums66 Topics128,091 Posts1,056,034 Members48,433 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
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#56442 02/13/2006 5:59 PM | Joined: Sep 2003 Posts: 343 Member | | Member Joined: Sep 2003 Posts: 343 | I did read that these axles were 3.90:1. My truck really seems to be winding out at 55 MPH, so I have been thinking about a gear upgrade or an axle swap. I have checked out a few of the vendor sites and they all seem to only offer a 3.38:1 replacement gears. Do you think this ratio change will allow my truck to cruise comfortably at 60-65 MPH?
1954 GMC 1/2-ton Longbed
1971 Pontiac LeMans Sport
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