lsd rear diff

[billybobboot]

As title looking into lsd for both front and rear but starting on rear is there a particular diff i need without going aftermarket? Not bothered about ayc its good but dosnt give the same feel or results on a little loose serface like a lsd does.

[chris g]

So you need a diff that is going to give you the right feel on loose stuff...?

Taking the vr-4 on loose stuff and working it so that you need 'feel'...?

[Gly]

standard open rear diff (non ayc) from any 8th gen 4WD legnum or galant (turbo or not) and the shafts,
and any evo 2-9 LSD Unit will slip right in, and is 100% bolt on,

pull out the old ayc diff and shafts pump and res, and rear wiring loom, disconnect the Ayc ecu/fuse
fit all off above fill the diff with lsd oil and its done

4 hour job tops!

[billybobboot]

I dont just drive my car when its all sunny and hunkey dory! Im not that ainal like some who wont drive there car when there is a spot of rain.
I thought vr4s had a 30% lsd on front and the ayc should act as a lsd but diffrent on the back. But on really wet roads and slippy roads was loosing traction. Im not driving like a mad man i have my wife in the car! Just on loose (leafy wet slight loose ground) you can feel the car loosing grip when one wheel cant grip (an normal diff) unlike lsd would keep other still working as well as wheel loosing grip.
Like said i drive the car in all weathers down every sort of road no just drive down town roads and motorways.
On you note of feel! If you drive cars even 4wd with lsds then ones without you can feel / the difference.
Hence why what diff do i need to get lsd or are all evos ayc only and not lsds in the diff? Im not after a 1 way or anything just a 30-40% almost a .5 way diff

[billybobboot]

standard open rear diff (non ayc) from any 8th gen 4WD legnum or galant (turbo or not) and the shafts,
and any evo 2-9 LSD Unit will slip right in, and is 100% bolt on,

pull out the old ayc diff and shafts pump and res, and rear wiring loom, disconnect the Ayc ecu/fuse
fit all off above fill the diff with lsd oil and its done

4 hour job tops!

Thank you was the sort of answer i was after! Not your driving on loose ground!

[Gly]

evo 5/6 front LSD bolts into the standard transfercase, or you can put the evo 5/6 lsd transfercase into the vr4,

i had the stock evo 5/6 helical front lsd with upgraded bolts, and evo plate lsd in the rear, mainly because the rear ayc diff was too weak for me.

[chris g]

Slipping away from the loose stuff, I hope you feel ok about this answer...

All Evos are not AYC

Lancer Evolution and Evo 2 and 3 have LSD...

[Confused]

What tyres do you have?

[elnevio]

The rear diff with AYC is like an LSD, but could perhaps be called an LSD+, because it limits the slip of the wheel without traction, like an LSD; but above that it transfers more torque to the wheel that has the traction.

The front diff is just an open diff.

Some later Evos (the RS ones) have an LSD.

[chris g]

Ah yes El Nev, I forgot the RS versions...

[billybobboot]

My ayc dosnt always work pump is failing i believe so was looking at other options as i cant be assed to fix a problem that when i really need it its going to just decide to throw a wobbly at me and say no.
I know the ayc is a type of lsd that mitzi have developed as its an alternative to new electric types of diffs driven cars with electric diffs and the too on off the ayc is good but too unreliable espesh when its normally ok then decides the oil is to thin as the pump cant hold pressure just when i need it when on loose serfices.
Evo wise didnt know they didnt use ayc thought they used it except the off few and the odd other few also go s-ayc.
Like said want something reliable so can look into options as watch out for the right parts to come up.
Looks like will be evo 5/6 front diff with prob evo rs rear as the rs is ment to be a better diff isnt it??

[billybobboot]

What tyres do you have?

Cant remember off top of head something v2s there 205/45/16 there not cheap i dont do cheap budget. I know there all the same brand all running 32-34psi nitro filled tyres are swapped from front to back then corner to corner normally get rotational tyres so second swap there normaly stripped and put back on. Did a front to back just before holiday so will get a side to side in 2000miles time as do it every 3k to keep even ware on all tyres the same.

[billybobboot]

I know the ayc works when it decides its going to i know for about 250 i can get the pump rebuilt but i cant be assed to wait for it to fail again after would just rather put lsd in and be done with it.

[billybobboot]

Sorry chris to get stuck up on the feel thing but when i put the car onto a serface i dont wanna feel the car slipping around or feel it loosing grip i want a car that i know exactly what its going to do when i need it to i would expect it to be all over the place on gravel but its not a rally car so not that stupid if its a little wet a loose i dont expect or want my car to just give up because i didnt drive on a perfectly dry flat bit of race track. If its giving up and slipping a wheel or two on slow wet roads i would hate to be pushing the car near its limit!

[Gly]

Looks like will be evo 5/6 front diff with prob evo rs rear as the rs is ment to be a better diff isnt it??

the evo 4-6 and vr4 share the same basic drive line gear, there are slight differences, gear ratios and mounting differences in the rear diff (some spacers will fix that) but im not sure on shaft fitment,

which is why i said you need the Legnum/galant rear open diff housing and shafts and JUST the LSD insert from the evo, also the evo has slightly different ratio, but nothing people have had a problem with

[billybobboot]

Sorry by diff i ment just the lsd not the casing
Plan was to use as you said non ayc casing and shafts.
but prob look for evo rs lsd to fit or is it better to stick to 4-6 as most of these are very sim to vr4s
Side question with non ayc cars are the rear hubs the same size or do i need to change the bearings with new hubs?

[billybobboot]

Am i right in thinking the front lsd is built into the transfer box? I know normaly on the front there in the box but ive not really delt with 4wd diff before as the last one i had celica st185 and 205 had diffs already fitted.

[Gly]

standard evo 2-9 LSD units are all the same, RS does not guarantee LSD.

yes the front diff is in the trasfercase, center diff is in the gearbox. the stock center diff is a viscous unit.

[billybobboot]

Tyres are hancook ventus v12 evo 205/45/16

[billybobboot]

Cool so ill keep an eye out for evo 5-6 front transfer diff and 9 rear inner with non ayc casing and shafts