im tryin to figure out if i should go with 4.10 or 4.56 gears in my 99 dodge ram 1500 with the 5.9L. i have 35 inch tires and stock gears as of now. which gears would give me the best gas mileage and best performance?

 

the 4.10 gears will do fine with 35's and as for gas and performance, there wont be any real noticable gains. there are some theads here that will explain how the gears work, cuz i asked the same question

 

4.56 gears

 

what kind of mileage are you getting?

 

so did you put gears in ur truck then?

 

i bought the truck, and didnt know what gears were in it (no tag) and i knew it was rebuilt, and found out they were 4.10 gears.( after someone explained the rotation of driveshaft to find out what gears are in it) i have 285 75 16 tires, and my truck rips it up with those and i thinkthose are 33's right? and as for gas i get about 13 city and 17-20 highway

 

ya they are either 32s or 33s. and im getting 12mpg no matter what

 

your also lifted, i only have a 2 1/2 in leveling kit, so that takes some MPG's from you

 

ya and i just put a 2" leveling kit on it this weekend so now its even higher lol

 

Beat it to death some more. 4.56!