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Custom Chassis - Drive Line - Suspension - Wheels and Tires - LOWERING or STANDARD Discuss anything related to Custom Dodge Ram Wheels, Tires, Brakes, Suspension Mods, Chassis Mods and Tuning, Towing options, Driveline, Differentials, Sway Bars, Lowering Springs, Strut Braces, etc.


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Old 09-19-2013, 08:30 PM
Ragemoto Ragemoto is offline
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Default 4:56 gears and Detroit Trutrac installed!

Ok,

So i just got my truck back the other day from Gearworks in Clearwater FL. I had them install 4:56 gears and a Trutrac LSD. I am just finishing up the breakin cycle. I have been running 325/65/18 Terra Grapplers but just put a new set of 35/12.5/18 Cooper STT's

The traction and acceleration is mind blowing, however, my city milage is reading 10-11.5 significanly lower from wheni had the crap 3:21's

My GPS is reading speed just about spot on and I cna't get a solid answer if I need to get the computer flased to relfect the gearing change to correct shift points.

The dealer quoted 69.00 for the gear adjustment and 69 for the tire size correction that I never bothered with. Please advise...
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Old 09-19-2013, 10:02 PM
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hydrex hydrex is offline
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Might need some wheelie bars, hehe. If you get a Diablo tuner, you can reset the speedo, and I suspect your mileage will look a lot better.
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Old 09-21-2013, 06:57 PM
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no adjustment needed for regear. dealership can do tire size.change adjustment for mph correction or purchase do it yourself with handheld programmer.
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Old 10-17-2013, 12:08 PM
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So I'm thinking about upgrading to 4.10's or 4.56's as well to get some power back after installing my lift and was wondering if the computer needed to be updated after installing the new gears. I talked to 4 wheel parts and they said I'd have get a new tune, but I really don't want to for fear of voiding the lifetime warranty. Does anyone know if the dealership will update the computer after 4 wheel parts installs the gears without voiding the warranty on the rest of the engine/drivetrain? I don't care if I lose the warranty on the diffs especially if I go with a 4.56 because those would be pretty much bulletproof. I just don't wanna void my warranty on the engine/tranny/transfer case etc cause I'm planning on driving this bad boy for a long time.
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