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New gears = WOW!

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Old 03-31-2013, 06:19 PM
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Originally Posted by HAMMER!
I haven't ran mine with the 408ci yet but truck ran 13.7@101mph with factory 6.0l, cam & converter
what tire, gear, cam and converter did you run that on?
I have no idea what to expect to run with mine on and off the gas
Old 04-01-2013, 06:07 PM
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Stock tires, stock 4:10 gears, EPS 222/230 .596".600" lift 112 + 2 lsa cam, circle-D billet multi-disc 3500 converter, and LT's.

On 35's nitto mud grappler it ran 14.0@99mph.
Old 07-11-2013, 01:05 PM
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I keep reading all of these threads and I think I'm convinced that I want 4.11's or 4.56's It seems like the best mod for low down performance and towing. My little 4.8 doesn't really make much below 3,000rpm's so I'm trying to bring the power band back down.
Old 07-11-2013, 02:13 PM
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4.56s ftw!! If you have anything over a 33" tire IMO. I have 33s now with my 4.56s and i love the combo!
Old 07-11-2013, 06:05 PM
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Originally Posted by ITR0055
I keep reading all of these threads and I think I'm convinced that I want 4.11's or 4.56's It seems like the best mod for low down performance and towing. My little 4.8 doesn't really make much below 3,000rpm's so I'm trying to bring the power band back down.

I agree. The gear swap helped my lil 4.8 get up and go a lot easier.
I'm running 30" tires and don't plan on going bigger so i went with 4.10s.
Old 07-11-2013, 10:47 PM
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I have 6.2 and 4:56's on stock 20's and oE tire size I love them nothing short of a cummins camaro or mustang can keep up when you nail it from a roll or to pass a car.
Old 07-12-2013, 07:57 AM
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Originally Posted by Ricksilvy
I agree. The gear swap helped my lil 4.8 get up and go a lot easier.
I'm running 30" tires and don't plan on going bigger so i went with 4.10s.
Thanks for the input. I think I'm just going to do the 4.10 because i do a lot of highway driving. Did you upgrade from 3.42 or 3.73? Did you notice any mileage increase from the motor having to work less?
Old 07-12-2013, 01:23 PM
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Originally Posted by 01WS6/tamu
I have 6.2 and 4:56's on stock 20's and oE tire size I love them nothing short of a cummins camaro or mustang can keep up when you nail it from a roll or to pass a car.
Whats your RPMS at cursing speeds of 70-80mph? im thinking hard about going to a smaller tire. For go fast reasons of coarse.
Old 07-12-2013, 05:40 PM
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Originally Posted by ITR0055
Thanks for the input. I think I'm just going to do the 4.10 because i do a lot of highway driving. Did you upgrade from 3.42 or 3.73? Did you notice any mileage increase from the motor having to work less?
From 3.42 to 4.10s i did see an increase of fuel mileage on the streets.
I went from 16mpg to 18/19mpg overall(Mixture of street/highway and spirited driving with a few WOT runs). But i also did the gear swap with all the mods below. I'm sure that helped mpg's as well.
If you don't plan on running tires any bigger that 30" go 4.10s. anything bigger that 30s i would go lower gears(4.56s).
Old 07-13-2013, 10:36 AM
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Originally Posted by Ricksilvy
From 3.42 to 4.10s i did see an increase of fuel mileage on the streets.
I went from 16mpg to 18/19mpg overall(Mixture of street/highway and spirited driving with a few WOT runs). But i also did the gear swap with all the mods below. I'm sure that helped mpg's as well.
If you don't plan on running tires any bigger that 30" go 4.10s. anything bigger that 30s i would go lower gears(4.56s).
I'm running a 285/70/17 now (basically almost a 33), and If i do go bigger it will only be to 4'' lift with 33x12.50's. It's such a labor intensive swap that I didn't want to make the wrong decision.


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