rear diff ratio?

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dsm2evo

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Joined
Aug 28, 2016
Messages
157
Location
canada
Ok I have been looking for a straight answer to this for hours but everything I am finding people fight if its 3.545 or 3.909. So I will cut it to the chase,

my car is a EVO 1 GSR, my rear diff decided to pile up the other day and being in Canada parts are scarce. However if my diff is a 3.545 then its no big deal as a 2g manual dsm is also a 3.545 and there are tons of those here. I am aware that there are lots of threads stating its a 3.909 but there are just as many saying its a 3.545 so I am just trying to cover my bases before I go and buy a part that I can not use and may do more damage then there already is. Thanks for the help guys
 
as above....3.909

there is also a pate on the firewall that will tell you the ratio....if it hasnt been changed from manufacture
 
jack be nimble said:
Check yours before you buy one.
yea I am going to but it locked up on me the other night and when I drained the fluid it was a constant stream of silver and flake so im pretty sure there is some damage.
 
I have couple of 3.909 plate lsd here in Western Australia tat have come out of wrecks. I’m pretty sure they would be too heavy for post. If you get desperate we might be able to figure out another shipping method.
 
BMGTZ said:
I have couple of 3.909 plate lsd here in Western Australia tat have come out of wrecks. I’m pretty sure they would be too heavy for post. If you get desperate we might be able to figure out another shipping method.
I appreciate it man, I had mine apart tonight and it looks like it may just need some new bearings though. I want to disassemble the actual diff itself and see how the spider gears are inside and if they are destroyed or not cause otherwise I don't know where the metal shavings are coming from unless my bearings just gave out.
 
dsm2evo said:
I appreciate it man, I had mine apart tonight and it looks like it may just need some new bearings though. I want to disassemble the actual diff itself and see how the spider gears are inside and if they are destroyed or not cause otherwise I don't know where the metal shavings are coming from unless my bearings just gave out.
I believe every Evo from 0 to 10 uses the same rear diff internals.

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