DODGE RAM FORUM - Ram Forums & Owners Club! - Ram Truck Forum - View Single Post - 3.21 axle gear swap?
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Old 10-23-2013, 07:22 PM
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Join Date: Jun 2013
Location: NC
Age: 26
Posts: 22,826
Gender: Male
Vehicle: 2013 Ram 1500
Trim Level: Lone Star (MJX8)
Color: Bright White (PW7)
Engine: 2013-20?? 345ci (5.7L) Hemi V8 395hp 410lb/ft
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Yes you should get what you're promised, but y'all need to realize that the final drive ratio on an 8 speed ram with 3.21 diff in 1st gear is 15.12:1. With a 4.10 and the 6 speed tranny its 12.3:1. I think a lot of the hate for the 3.21s is fed by those with the 6 speed where the 3.92 diff made a big difference, but the bottom line is that if a 6 speed truck with 3.92s was good enough for you, an 8 speed with 3.21s will actually be an improvement. Now you do get an 18.46:1 1st gear final drive ratio with an 8 speed and 3.92s, but the point of the post is to demonstrate the adequacy of the 3.21 with the 8 speed.
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Thunderhorse:
2013 Ram 1500 Lone Star Quad Cab 4X4. Bright White (PW7), 345ci Hemi V8, 8HP70, 3.21 gears (LSD rear). Mods list
Colt:
2015 Durango SXT Southwest Heat RWD. White Knuckle (PW7), 220ci Pentastar V6, 845RFE, 3.45 gears (open). Huskyliners, Catch can. Thread
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