4:56 or what

[chills88k5blaze]

I am trying to find some info I am running 35's on my 88 K5 this is my Daily Driver so you know with stock gears my MPG Sucks so can any one tell me by upgrading to 4:56 how much would that improve my MPG.

I am also thinking of geting EFI Manifold where should I get that LMC has one for just under 1300.00 has every thing you need to install but it I am trying to see if I can get it cheaper. any help would be great.

 

['71k204x4454]

This chart will help but you have to drive a lot to make up for the cost of replacing the gears. http://www.4x4offroads.com/gear-ratio-chart.html

 

[OffRoad]

if your tranny has overdrive, use 4.56s.
if your tranny doesn't have overdrive, use 4.10s.

unless you don't drive on the highway much, then run 4.56s anyway.

 

[chills88k5blaze]

Yes I have OD tranny and 4.56's would be great but after doing the greas can anyone tell me what i may get as far as MPG right now I get maybe get 10 mpg. and that is killing the Bank.

(so you all know I know having an old truck dose mean its going to suck the gas I am just looking to improve that just a bit)

 

[RubberFloorMat]

thats one of the things im looking at too, at 70mph im turning 1800rpm in OD.

it hunts between gears on the hiway alot, i dont want to tear up the od band.

im thinking it must have like 3:08's in the rear to turn that low with 33"s

im thinking 3:73 or 4:10's, which would be better for a mostly street driven with a few trails??? is there as much diff as there is in a street car??

 

[yunit]

4.10's with 35's