Thread: Who's running 4.37's in their diffs??

G'day all,

So, I see quite often that 4.11's or 4.12's are the common upgrade when going to larger tyres (in fact I ran 4.11's in my old D1 with 33's & 35's), and then there are a few mentions of those running 4.75's, but I've never really seen or heard of anyone running 4.37's.

I'm looking at running 35's on my D2 in a few months (hopefully), and 4.37's are the ideal ratio to bring it back to standard gearing, and what I'm leaning towards due to the fact that the 35's will be staying on the D2 for good.

So, my question is, why don't 4.37's feature as commonly as 4.11's or 4.12's, especially on vehicles running 35's?? Are they weaker?? Is it because they've not been around as long as the other ratio's?? Etc, etc??

Opinions welcome, but first hand experience would be great.

They're only a new ratio. Up until recently the only real available option with strength was the 4.11 or the weaker 4.1. As the ratios lower the gear strength reduces, but as newer ratios have been released like 4.12 and the ratio you talk about they have been able to use stronger tooth counts and more recently again they have changed to better materials for improved strength.