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dangles

3.69 to 3.9 ratio, worth doing?

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Hey guys,

 

I have a chance to upgrade the diff to a s15 auto 3.9 diff

 

Pretty much as title says, is the DIFF ratio upgrade worth doing? Is there a noticable upgrade? Car will be drifted here and there.

 

Thanks alot for help :)

Edited by dangles

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Def a worth while upgrade IMO.

I made the change a while back and the extra little bit of torque is great.

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Auto diff is viscous & can be shimmed. I've got one in my 15 & it's fine.

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Noticed no difference at all tbh, that was going from an auto 3.9 to a manual 3.6 that came in a Tomei 2-way

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you'll notice if you go to 4.363

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I could definately feel a difference going from the std s14 3.69 to the R33 4.11 diff.

Couldnt care less about the higher revs on the freeway as my car doesnt really do any freeway driving.

I found that is gets off the line a little better and builds boost little quicker. Nothing that will blow ya socks off but def an improvement.

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Ive already got a nismo 2 wau centre in mine, cept i was noob back then and kept the 3.69 ratio

 

Now I am getting a 3.9 auto diff for free, cept id like to know if anyone is actually running a 3.9 or whether I should just try get my hands on a 4.11 or 4.08

 

 

Side note: does anyone wanna swap their 4.11 diff for my 3.9? Lol

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