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Harley-Davidson™ F-150
4.56 Rear Gears for 2003 H-D
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<blockquote data-quote="tebraddock" data-source="post: 487272" data-attributes="member: 10317"><p>I am currently researching whether I want to lower my rear-end gears and am looking for info/advice. Have been recommended to go with 4.10s, but like the idea of going to 4.56s. For those of you who have 4.56s, what do you think? For those of you who are just in "the know," tell me what you think based off of these speed to RPM ratios (60/1800, 70/2200, 80/2500, 90/2800, 100/3200). These are obviously cruising numbers. </p><p></p><p>Here is what I have had done to the truck so far:</p><p></p><p>MAC Cold Air Intake</p><p>MAC Catback</p><p>LFP/METCO 2.8" Upper Pulley/6 PSI Lower Pulley/Idler Pulley</p><p>DIABLO Flip Chip</p><p></p><p>This is what is going in/on when the parts come in:</p><p></p><p>LFP Shift Kit</p><p>Bassani 1 5/8" Ceramic Coated Headers</p><p>AccuFab Throttle Body</p><p>Motive Rear Gears (4.10 or 4.56)</p><p></p><p>I am also looking at a Mass Air Sensor and a DIS-4, but have currently been advised against either. Any input would be appreciated. Thanks.</p><p></p><p>Tom Braddock</p></blockquote><p></p>
[QUOTE="tebraddock, post: 487272, member: 10317"] I am currently researching whether I want to lower my rear-end gears and am looking for info/advice. Have been recommended to go with 4.10s, but like the idea of going to 4.56s. For those of you who have 4.56s, what do you think? For those of you who are just in "the know," tell me what you think based off of these speed to RPM ratios (60/1800, 70/2200, 80/2500, 90/2800, 100/3200). These are obviously cruising numbers. Here is what I have had done to the truck so far: MAC Cold Air Intake MAC Catback LFP/METCO 2.8" Upper Pulley/6 PSI Lower Pulley/Idler Pulley DIABLO Flip Chip This is what is going in/on when the parts come in: LFP Shift Kit Bassani 1 5/8" Ceramic Coated Headers AccuFab Throttle Body Motive Rear Gears (4.10 or 4.56) I am also looking at a Mass Air Sensor and a DIS-4, but have currently been advised against either. Any input would be appreciated. Thanks. Tom Braddock [/QUOTE]
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Harley-Davidson™ F-150
4.56 Rear Gears for 2003 H-D
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