My truck is a 2001 silverado extended cab 35in Bfg All-terrrains 5.3 tsp220 cai and tb converter, so 4.10's 4.30's or 4.56's? The bfg isnt a true 35 and quite honestly I might lower it back down and stick some 285's on it. I am leaning towards 4.30's but dont know for sure, I drive mostly city with highway once or twice a week. I pull a jon boat and a 4wheeler thats it, I dont ever go off road. I dont wanna kill my mileage but I know its gonna go down some, so what do you guys think? What r the performance difference's if any? Thanks
It has 3.73's right now

 

If it were me and i was gonna go to 285's id go with the 4.30's..

 

35's = 56's imo

 

Id go 4.56 with the 35's You may be surprised and see an increase in mileage. I just went from 3.23 to 4.10 and my city mileage went way up

 

I have 35" BFGs (beater tires) on 4.56s. Gained 2 MPG mostly city driving switching from 3.73s. Transmission runs cooler as well.

 

damn! with 35's you def need 4:56's...

 

Tell me about it, its a turd on take off right now. The converter helped alot thou, what brand do u all suggest?

 

How bad would it be if i decided later on to go back to 285's?

 

Rons machine is a greeat place to purchase differential parts, personally i wouldnt think you'd have much of a problem going back to 285's if anything a traction problem