bigcomfy

hey im new here...i just got this blue 91 k5. its got 38 inch swamps on it and stock gears so it moves slow as hell and im getting about 7 mpg on the highway going about 65mph

well thats not cool so i wanna get new gears...

hows 4.56 sound? i do a lot of highway driving with it...about 50 miles round trip when i do drive it. obviously im not expecting it get great mileage but if i could somehow get it to atleast 12 on the highway i would be very pleased...and anything in excess of 12 i would love as well if it meant a different ratio. i just dont know much about gearing...

if i could get some input i would really appreciate it.

thanks a lot!
bc

mike79K5

i get 17 mph with 35's SS on my 79. good luck.

bigcomfy

what does SS mean? stock setup? 17 mpg would be amazing.

mike79K5

super swampers, 8" lift. elderbrock crate 350 5.7..... 35x12.5x17 tires and rims... was amazed when i drove it around . we averaged it up and it came out to 17mph unless i was getting on it alot.

mudmaniac

4.56 with the 38's should be about right, I have the 4.56 with my 35's

bigcomfy

4.45 seems high for 35's, or atleast its uncommon from what ive been able to find...do you use yours for pretty much city and mud? im really concerned about highway because although 38 inch swamps isnt ideal i want to see what i can get with an ideal setup.

btw that thing looks sweet! i want to put some pics of mine up if i can figure it out

suzuki-guy

I have 35s with 4:56 gears been on there for 200,000 miles and I also get 17 miles highway

bigcomfy

wow thats sweet...i honestly dont even get 17 mpg on my 08 escalade. so if youre running 4.56 with 35's should i go even lower?

suzuki-guy

Get Some military axles!!! LOL No I think you should be alright with 4:56 gears and 38's!

bigcomfy

sweet...now all i have to do is find a shop...how much should i be expecting to pay?