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Discussion Starter · #1 ·
Getting 4.56s installed Saturday morning!
 

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Discussion Starter · #2 ·
Here is a quick pic of my engine bay...

 

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Thatll be awesome man your truck is gonna fly if it can hook up! lol
 

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Nice I remeber when I changed to the 4.88 was fun.
 

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Awesome, what gearing did you run the 12.5 on? 3.55? You're truck is wicked!

Is that the v6 electric fan? Did you notice cooling improvements switching to it? I ask because I run no mech fan and the stock efan with stock shroud and have not had any issues with 180 tstat and fan set to kick on at around 200 deg. While moving the coolant never gets above like 190-194, and when sitting it climbs, then the fan kicks on and it comes back down to around 194. Then I get moving again and the fan kicks off as the coolant cools down.

JW if it's only a space savings mod or if it moves more air...
 

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Discussion Starter · #6 ·
Awesome, what gearing did you run the 12.5 on? 3.55? You're truck is wicked!

Is that the v6 electric fan? Did you notice cooling improvements switching to it? I ask because I run no mech fan and the stock efan with stock shroud and have not had any issues with 180 tstat and fan set to kick on at around 200 deg. While moving the coolant never gets above like 190-194, and when sitting it climbs, then the fan kicks on and it comes back down to around 194. Then I get moving again and the fan kicks off as the coolant cools down.

JW if it's only a space savings mod or if it moves more air...
I went from the clutch fan to the Efan and have seen no change in temps. I do feel it rev up faster without the heavy clutch fan on the motor.
 

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Discussion Starter · #7 ·
I ran the 12.5 on 3.92s. I expect a nice change going to the 4.56s. Maybe not a HUGE change if I was at 3.21 or 3.55.
 

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Discussion Starter · #8 ·
Any advice from people who went bigger with gears?

Break in?

Driving style?

Level of awesomeness!?
 

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Follow the instructions of the gear manufacturer. Just finished up my 500 break in and it was hard considering the route i use and i rarely use the truck during weekdays.

I don't know much about FI power band and peak but i thought the 3.xx ratios would be good on FI to make use of the rpm through the whole power band. It will go much quicker with 4.56's.

That said they are darn sweet on a NA setup.
 
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