Hello all, I have a 2000 ram 1500 with the 5.9l auto. Recently I have swapped the front axle with a 1996. My truck says to have 3:55s, I believe it bc it’s a dog with 35s lol. But I changed on the fluid in the new to me front axle from a 96’ and when I did I counted the gear teeth to find out what the ratio is and I came up with 3:54. Now with winter approaching and needed my 4x4 again. I’m wondering if the 3:54s are just 3:55s but Chrysler just rounded up, or if I need new gears before installing my front driveshaft again and using 4x4. Any feedback is greatly appreciated.

 

That's how Chrysler was 3.54s were 3.55s the bigger issue would be going to a smaller brake caliper

 

So they are the same then? For sure? I don’t really wanna change the transfer case lol. And the smaller calipers are no biggy. I already have the axle in and been driving the truck. Brakes feel the same honestly.

 

That's exactly how Chrysler did it. Even if they didn't .01 difference won't hurt anything. Chrysler marketed 3.54s as 3.55s

 

Yeah, that tiny bit of possible difference simply isn't going to matter. Still and all, do NOT use 4x4 on high traction surfaces. That WILL break things.