performance question

[blh0007]

hey guys. i'm considering 32x11.5 tires and a gearing change. i am wondering how my engine is going to perform with 4.10 vs 4.56. i'm factoring in gas mileage mostly, but i do pull a boat some and i have had my fair share of offroading.

 

[Big Jim M]

You need to know what is the gear ratio in there now.. Then the tire height you are running now.. Then compare the final ratio with the 32's and each of the possible gears after the change.
I'd be for a few more rpm with the taller tires than you have now with the shorter tires.
Big Jim.

 

[blh0007]

You need to know what is the gear ratio in there now.. Then the tire height you are running now.. Then compare the final ratio with the 32's and each of the possible gears after the change.
I'd be for a few more rpm with the taller tires than you have now with the shorter tires.
Big Jim.

hey man,
yeah i know that i have 3.73 gearing in there now and my tire size is 31x10.5
i know what the scientific explanation is behind different gear ratios/tire sizes. i was just wondering if anyone could give me a review on how they liked it and how their truck did under different circumstances (gas mileage, pulling a trailer, off roading... ect.)

 

[Big Jim M]

Both my 3.0 and my 4.0 SOHC have 4:11 and 30" tires. I'm thinking you are already too tall and as a result you are keeping the vacuum low most of the time.
For sure I'd be advising the 4:56 for your ride.
Big JIm