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

[brenno]

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.

[clive22]

Hi

Not strictly an answer to your question, but as an alternative. Why not if your running a disco which has a 1.4 transfer run defender 1.2 one, and couple with the well known 4.11 ratios. This should be close enough to standard in HR.

Then so you really make use of your 35's put in 33% reduction LR gears from Maxidrive. After putting these in mine, if you do steep stuff, you'll appreciate the additional torque.

After writing that above I checked on the Ashcroft website and see they are making there course tooth diff in the 4.37s. Which I guess would be mean they are OK strength wise. I' ve run their course, in 3.50s, tooth design in my rover front for 3 years now no probs, which may give you some confidence.

I'd still go reduction gears though, really think it an important part of the overall upgrade to 35s

Clive

[Slunnie]

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.