Rear LSD Options for E39A

[Entaran]

So, we all know about the elusive RS rear ends (4 bolt w/lsd).

They also come 4 bolt w/o LSD.

What about 3 bolts? Does E1-3 gear fit into the housings if you use the 3.545 wheels to fix the ratio?

Is it possible to get an LSD and retain 4ws?

 

[bazeng]

Lorry,

The Mechanical LSD's require the larger cups found in the 4bolts.
You could possibly use the larger cups with the smaller 3bolt shafts if the CVs allow it.

You will ose 4ws if you go mechanical due to the size of the diff.

The Viscous will allow you to retain 4ws.
Galant models only, not DSM's as they don't have 4ws.

The housings are all the same.

Late night post, so I hope it makes sense.

 

[Entaran]

Baz, Do you happen to have a 4bolt 3.545 setup still lying around I could just buy off you?

I'll swap 4ws for an LSD if I -have- to, but I'd really prefer to have both.

 

[to4garret]

there is a 3bolt LSD for sale on GVR4 atm lorrie. it has the pump stuff.

 

[Entaran]

Yeah I pmed him.

Will see what happens thanks

 

[CLuTZ]

I had a mechanical 3-bolt my old VR4- Cusco I believe

 

[VR-4Squid]

I had a mechanical 3-bolt my old VR4- Cusco I believe

I've got two factory mitsubishi 3 bolt mechanical lsd's from early vr4 RS's.

As baz said you can fit an evo lsd centre into the vr4 housing with the vr4 3.545 gears.

afaik there is no way to have 4ws AND a mech lsd.

why do you want to keep the 4ws? I found it makes the car slightly nervous in high speed corners (on the track) makes little difference on the road and makes the car very unpredictable on loose surfaces.

 

[Dean]

how bout mattrat's 4 bolt for sale?
http://4gtuner.com/site/showthread.php?t=15887
not sure if with or without LSD.

 

[Entaran]

Without being offensive, liking or disliking the 4ws is all about driving style. I've noticed that those of us from FWD backgrounds like it, and those of us from RWD backgrounds don't.

I'm from the former and I find it useful enough that I would prefer to keep it.

 

[GVR40]

lorrie, the diff i'm selling has the 4ws stuff on it, i just never used it (was disconnected), and i replied to your pm

 

[VR-4Squid]

Without being offensive, liking or disliking the 4ws is all about driving style. I've noticed that those of us from FWD backgrounds like it, and those of us from RWD backgrounds don't.

I'm from the former and I find it useful enough that I would prefer to keep it.

no offence taken. Interesting point of view, I've had many fwd's and just one rwd for about 6 months.
But the vast majority of my driving experience has been in the vr4, which really requires a different driving style to either fwd or rwd to exploit it's strengths and avoid its weaknesses.

 

[Entaran]

Thats very true squid, AWD's and especially vr4's require a different touch, but under serious strain it will still react more like a FWD than a RWD in that it tends to understeer long before it comes around on you. Also, my car's a street car and the 4ws really is nice for highway stability (I don't live in a big city, drive quite a few highway kms)

Gravel rally, I'd probably keep the 4ws but you really can't because you snap 3 bolts and really need a 4 bolt in the rear end. Last time I did a few gravel stages in my silver vr4 it was really hurting after the 3rd one. Tarmac racing I'd probably ditch the 4ws... but I'm not doing any serious tarmac racing in this car so I have different priorities (like highway stability). Cheers tho

The biggest reason for me needing an LSD of any sort in the rear is that the BC coilovers are so seriously limited in travel that I can tripod a wheel coming out of most driveways on an angle. That means that I sometimes end up with one rear wheel spinning in the air, one front wheel fighting for grip and grinding against the pavement and not going anywhere in a whole lot of an elegant fashion... a viscous LSD will be fine for my needs I think.

 

[evopwr]

The biggest reason for me needing an LSD of any sort in the rear is that the BC coilovers are so seriously limited in travel that I can tripod a wheel coming out of most driveways on an angle.

The joys of aftermarket suspension kits!

 

[Entaran]

It's infinitely better than standard. Believe me.

 

[rob323]

It's infinitely better than standard. Believe me.

Considering the vr4 has quite alot of suspension travel from standard, anything which compromises it that much I would not call "better". And it's all because the gummybears that design the kits don't want to use coilover type springs longer than 200mm and design the shock body length to suit.

Have you measured how much droop travel you actually have?
Anything less than 50mm is poor, 75mm is better for typical street/ tarmac stuff.

 

[CLuTZ]

Thats very true squid, AWD's and especially vr4's require a different touch, but under serious strain it will still react more like a FWD than a RWD in that it tends to understeer long before it comes around on you.

When I used to own my VR4 it would oversteer before it would understeer if I threw it into a corner going 120kph +

I reckon 4WS is useless, and sometime dangerous. If it was really that good, they would have put it in the early EVO's, and they'd still be using it today!

Back on topic though.......

 

[bazeng]

It is driver preference I guess.

An interesting test would be to reverse the 4ws lines so that when you turn left, the rears turn right!! LOL

360's?!?!?!?!?

 

[Entaran]

That baz, is very tempting

Rob, no idea. I'll check it next time I'm up in the air.

 

[WRCVR4]

I have a 3bolt viscus LSD sitting on my back deck.

 

[Jazz9]

I also have a spare viscous 3bolt lsd... just remember that you need 1 different CV cup for the viscous LSD.