4.27 VS 4.56

[dlonno]

I'm lookin to switch to 4.27, or 4.56 gears. I currently have 3.73, but I'm ridin on 35"s and I think I need upgrade. I had 4.56 in my last SD, but that was a 2000 gas V10. It made a big difference off the line. Can anyone recommend a ratio or tell me if its even worth the dough to switch. Thanks for the help.

[rankroddin250]

with the torque of the diesel you will probly be fine with the 4.27's if you go too low you will start to loose milage

[BigFordOn24s]

Man with 35s its probly not worth the money, i mean a 35 isnt much bigger than the stock..

[rankroddin250]

35 is way bigger than stock by about 6 inches in a gasser with 3.55 you have to go up to a 4.56 just to get back to stock with a 35

[Dave]

Stock is about a 32 inch tire on a 99-03 superduty

[Rwalker]

i ride on 37's and i have 3.73 gears. i think it is just fine. i had 4.10's in my old 1999 F-250 V-10, it was way to low geared i think. sure i could pull a house down but it wasnt good on the highway. can you say gas hog!!!!!

[dlonno]

Originally Posted by Rwalker29

i ride on 37's and i have 3.73 gears. i think it is just fine. i had 4.10's in my old 1999 F-250 V-10, it was way to low geared i think. sure i could pull a house down but it wasnt good on the highway. can you say gas hog!!!!!

yeah, the gas v10 hauled off the line but it sure ran high rpms on the highway.
I just don't wan't to waste a G if it wont make that much of a difference. But I also don't want to dog out the 6.0.

[lilredpowerstroke]

With 35's you should probably go with 4.30's or 4.10's. 4.10 will give you less rpm's on the higway and the 4.30's will get you off the line faster.

[rankroddin250]

thanks lil red i dont know how people here can run masive tires with out gearing down... just jumping up to a 285/75 over stock i noticed a huge power loss i cant imagine going 3 inches taller with out gears

[lilredpowerstroke]

Yeah me either. I wish I would have went with 4.88's and my 39.5's. But oh well it works out since I'm gonna drop down to 37's and lose some lift so I can haul a gooseneck.