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-   -   4.7L with 4.10's and LSD (

snrusnak 06-24-2011 02:04 PM

4.7L with 4.10's and LSD
I'm considering as my next mod to change my open diff 3.55 to a LSD 4.10, but would like some input on gas mileage from you guys that have this with the new 4.7L. Also welcoming input from 3.92 and 4.56 guys :) I'd like to see city and highway comparisons to my current 17-18city and 19-20hwy. I'd like to do this mod next as the 4.7 is slightly lacking power at lower rpm's. Thanks in advance.

southpaw5m 06-24-2011 10:54 PM

I had 3.92 as factory on my 03 and put in 4.10s, man major night and day difference. Practically drives itself now...

snrusnak 06-24-2011 11:02 PM

great info thanks, how's your gas mileage?

southpaw5m 06-24-2011 11:06 PM

Not sure, it's got to be better because I don't have to push the gas down as hard to get where I need to go. Don't go so much on rpm's as much as vacume. RPMs are higher but not by much but i'm using less vacume which means less gas to move the vehicle.

snrusnak 06-24-2011 11:09 PM

I see, do you know how many rpm's your at at freeway speeds? Thanks for the input! Do you have open differential or limited slip?

southpaw5m 06-24-2011 11:12 PM

I can't remember I'm going on the freeway tonight I'll let you know my 65mph and 70mph and maybe my 90mph depending on freeway congestion lol!
I have a detroit locker posy rear end, had it all done at once, works great lots of power whenever I need it in both wheels.

snrusnak 06-24-2011 11:17 PM

that'd be great then I can compare to what I have now, thanks! and don't get killed on my account haha!

southpaw5m 06-24-2011 11:20 PM

Don't worry I'm a Paramedic, driving fast is my profession, and cops always let us off from tickets. But your right safety first

snrusnak 06-24-2011 11:26 PM

at least I look responsible...:4-dontknow:

southpaw5m 06-25-2011 09:33 PM

Alright, so it looks like 1800-2000rpm at 65-70mph, it will also depend on the angle your driving(uphill or downhill)

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