rear diff "throbbing" - Mitsubishi Evolution Forums: Mitsubishi Lancer Forum

jpn · 10-03-2009, 07:03 AM

Am a newie here, car is an EVO5 gsr...I noticeed when i push my car hard in hairpin turns...1st gear speeds or wider hairpins at 2nd gear speeds, it feels like my rear diff is throbbing, kinda vibrating thuds...what is this??? I was told that it is the electronically controlled rear LSD.

My question...Is this normal for the electronically controlLed LSD? Can it be cured by a oil change?
An friend also told me...changing the rear diff to a clutch type LSD will eliminate this throbbing sound substancially....any truth to this?

SicLanEvo · 10-03-2009, 08:39 AM

I'm unsure if the evo 5's have acd but even so that only controls the front diff. Normally the rear is a helical LSD. Swap fluids and check your rear bushing maybe they are bad. You can also get solid mounts for the rear diff from AMS. Good luck

jpn · 10-03-2009, 11:38 PM

thanks for the reply....

They say the rear diff (EVO5gsr) is electronically controlled that has something to do with the AYC. Its my first time with evos so I really do not know what the throbbing/thudding sound is on hairpins when I am hard on the power....but it really could be the electronic diff trying to engage...hmmmm....hope to get more help in information!!!!

I hope someone can shed more light regarding the electronic rear diff before I buy a clutch type mechanical LSD which was standard on the EVO5 RS.......

SicLanEvo · 10-04-2009, 05:27 AM

yeah man we dont have the ayc here so i cant help you out with that one

jpn · 10-04-2009, 05:54 AM

Quote:

Originally Posted by SicLanEvo

yeah man we dont have the ayc here so i cant help you out with that one

Thanks again...I also found out there is some kind of hydraulic pump in the boot which is filled with ATF fluid and the lines I believe are connected to the diff....so it makes me believe its not a standard clutch lsd....

SicLanEvo · 10-04-2009, 11:00 AM

I know you guys had the ACD with the fluid up front but i was unsure about the rear. I want a evo 5

rookhoe · 10-05-2009, 05:44 AM

It would def be nice to have an 8 or 9 with AYC.

EVO_MERLE · 10-09-2009, 06:26 PM

sounds like the mounts are busted or fluid is low and is making it slip....change the fluid and check your mounts....I have a IX with the ACD. The sound you are hearing is not normal nor is it good.

SicLanEvo · 10-10-2009, 06:57 AM

^^ his car is a evo5 with electronic controlled rear diff. kinda like your evo IX ACD front diff but still diff. your rear in the evo IX is a mechancial helicial LSD type diff