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04-28-2008, 01:41 PM
| #1 |
| Full Member Join Date: Apr 2008 Location: sherwood forrest
Posts: 10
 | Differential gear ratios Hey fellow truckaholics,I just purchased a 65 fleetside 3/4 ton in really nice shape, was a Cailf truck. Only does 55mph wide open, has a 4 on the floor.What rearend gear ratio would be the best for 65mph?Can there be a gear swap or does the whole diff have to be changed? It has those realllllllly long swing arms. Maybe torch the unit out and put a leaf spring setup under it? Any help or advice sure would be welcome,thanks |
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04-28-2008, 02:27 PM
| #2 |
| Senior Moderator  Join Date: Apr 2005 Location: Texas
Posts: 3,722
 | yeah you can swap the gears only. the rear gear really depends on what the final gear is in the tranny too. If it is 1:1 then a 3.73 gear would be a good gear for the rearend. Won't lose anything on takeoff and still decent for cruising.
__________________ John Wayne 2000 F-350 7.3L Powerstroke 4x4 |
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