Hey Guys,
needing a little help regarding the Stock Rear Lsds...

From what i can find...

evo 1 came with a viscous lsd with the option for a mech LSD
evo 2 and newer are Mechanical LSDs,

and 2/3 are the same

and the 4-9 are the same

and from what i can find using Mitsi ASA/Caps the 2/3 and 4-9 all share the same part number,

SO they should all be the same/interchange (apart from the gear ratios) from 2-9
correct me if im wrong please!!

Now my question is, how can you tell the difference between a evo 1 mech LSD and a Evo 2+ mech LSD?? or are these the same aswell??

basically i need to build a New LSD diff for me Legnum VR4,
and i can use the EVO 4+ LSD center with my crown/pinion/casing.

but im having trouble finding a LSD center at a reasonable price
all i can find is a evo 3 mech LSD (apparently as the current own bought it as a evo 3 part, but hasnt used it and he cant tell the difference)


also i want to put the weir Performance 12 plate kit in it...
does this fit in? the earlier evo 2/3 lsd??

Thanks
Carsten

 

if your legnum vr4 is without AYC, congratulations , evo 2/3 rear lsd is straight swap in your diff caseing.

 

yes i have already sourced a replacement open diff and shafts.,

to replace the 4th AYC i just destroyed

Great... so i can just bolt in the LSD unit,


now just wanting to confirm what LSD im getting exactly...

how can i tell what model evo the Plate diff is from?

or are all the evo 1-9 rear plate diffs the same?

and can i use the weir performance 12 plate LSD kit in it? which is sold as a evo4-9 kit

 

the OEM part number for the plates is the same for the 3 and the US 8 so you should be able to use the Weir plates in a 3 diff.

The differential's themselves are the "same" though the outer casings differ.

 

but how are you going to match the ratio, afaik VR4 AYC diff is 3.323, evo3 - 3.909, VR4 non ayc diff - 3.312

you can put E3 differential in non ayc diff, leaving ring and pinion of non ayc diff and your ratio would stay 3.312 but if I'm not mistaken and AYC diff has 3.323 ratio, how are you going to match it ?

 

the open diff is from a non-turbo STR legnum, with the same Ratio.
(its the same as the Legnum VR4 type-V non ayc diff)

in the 8th gen galant/legnum 4wd's we do not have to worry about swapping rear diffs as there all the same ratio between the variations

turbo/non turbo, ayc or not, there all 53/16 = 3.3125

ill only be using the lsd unit from the evo with the STR housing/crown/pinion/shafts


ANYWAY......

Last thing i need to clear up....

can you tell the difference between a EVO 1 and 3 Mechanical LSD???
if so how? or are they the same??

the donor LSD unit is only allegedly from a E3 not deffinately

thanks for all your help so far

 

1's had viscous unit, different length driveshafts etc. forget about it
2-3's are the same, no difference

p.s. can't quite understand, what's the rar diff ratio of VR4 AYC diff ?
and one more, will vr4 non ayc diff bolt up straight to ayc subframe

 

yes. in the 8th gen vr4,

both ayc and non-ayc diffs are the same ratio. 3.312

and the mounts are all the same in the sub frame. so its all a direct bolt in job...

did thee EVO 1 not have an option for a mech LSD??

 

^ no, as a I remember

keep me in touch with your swap. have evo4 and going to replace ayc diff with mechanical unit as well

 

just found out E1 ones had mechanical lsd's as well. all RS's and some GSR's too

 

yeh thats what i thought,
in asa the evo 1 is the only LSD to have a different part number,


bought the unit anyway, i hope its correct.

no one can tell me if its the same part, or how to tell them apart.

 

well it all bolted together without issues,

removed the Evo 3 LSD unit from its original home,

bolted the the crown from the Legnum STR to the Evo 3 LSD,

then refitted it the STR housing, (which got a lick of paint to pretty it up )

so now i have a 3.312 LSD rear diff that will bolt directly into my Legnum VR4....

 

bye bye AYC.... (this is the 4th one I've blown up in the same fashion)




















hello LSD....



test driven and working fine,

next on the list front lsd and weir performance 12 plate kit in the rear

and heres my 1999 Mitsi Legnum vr4 (manual)

 

How often do you launch?
Or is it just shear power thats smashing them?

 

yikes