4.56s are in.

[Rewind]

I'm running 285's on my 3.42 gears.

 

[90chevstepside]

I've run 285/65's 285/75's, 305/60's, 305/65's, 33/12.5's, and 37/13.5's on 3.42's. 3.73 is a better ratio for 285's but, not worth changing gears for though.

 

[The big beast!]

37's are hard to run on 6" lift. You have to be FULLY cranked, and it is hell on the suspension.

I'm running 3" Bl 6" SL and about 2" of crank. So the 37s should fit alittle better then running just a 6" lift

 

[90chevstepside]

Oh never mind, you'll fit 37's fine then

 

[The big beast!]

Haha I dont really care if I have to work on it lots cuz I alread do! So if I can fit 37s it might look better then it does now with the 315. And hey if I get 37s thats 2" more lift! I might be better of doing a sas at this rate.

 

[fleischmann95]

can they regear the front diff?

 

[The big beast!]

can they regear the front diff?

ya, the front can be regeared but they say its harder then the rear! so it might cost more.

 

[JohnnyBarnett1981]

what would be the best all around gear ratio for a 3/4 ton 4x4 with 265's? i currently have 373's but i was debating 456's because i dont thing there would be enough of a difference to justify the cost of the swap just to go to 410's..i pull a 5th wheel travel trailer occasionally and the best this thing will do on a straight a way is 55 mph and it acts like its murder on the engine...its an 89 chevy 2500 with a tbi 350

 

[90chevstepside]

Well I'm running 4.56 on 37's. 4.56 would be insane with 265's. Your gas mileage and top speed would go WAYYYYYY down.

 

[JohnnyBarnett1981]

is there something inbetween a 410 and a 456? or do you think the 373 will perform better with engine upgrades? im about to swap for a vortec 350 using my exsisting tbi set up so that might help