LSD diff or not?

phoenix s14 · Post by **phoenix s14** » Tue Sep 22, 2009 10:13 am

in other words it is really hard to turn where the normal diff will spin quite freely.

Draco · Post by **Draco** » Tue Sep 22, 2009 10:15 am

But even a normal diff will be hard to turn when in gear wont it......

phoenix s14 · Post by **phoenix s14** » Tue Sep 22, 2009 10:16 am

eet meer pap!

Draco · Post by **Draco** » Tue Sep 22, 2009 10:19 am

At least now it makes sense that if you just jack up one side and the car is not in gear an open diff will turn quite freely with very little resistance....right

VLSD and CLSD will not turn or will turn with some resistance....right

Draco · Post by **Draco** » Tue Sep 22, 2009 10:20 am

phoenix s14 wrote:eet meer pap!

The last thing I need is pap

phoenix s14 · Post by **phoenix s14** » Tue Sep 22, 2009 10:22 am

seriously the propshaft will be locked but you will have only the diff working. hence the non viscous gear diff will just spin internally with no brake but the viscous diff will try to brake the effect (slip).

(dont try this at home) - if you jack up one wheel and start the engine and engage a gear and it does not pull off the jack then you have a normal diff...

if it does go to hospital and you have a LSD...

Sokar · Post by **Sokar** » Tue Sep 22, 2009 11:48 am

phoenix s14 wrote:seriously the propshaft will be locked but you will have only the diff working. hence the non viscous gear diff will just spin internally with no brake but the viscous diff will try to brake the effect (slip).

(dont try this at home) - if you jack up one wheel and start the engine and engage a gear and it does not pull off the jack then you have a normal diff... if it does go to hospital and you have a LSD...

I like my church test better...

Draco · Post by **Draco** » Tue Sep 22, 2009 12:11 pm

Visuals of the difference

Normal z31 diff:open

Mine:sepposedly LSD

Now the question beggs....why would someone put a diff cooler cover of an LSD on an open diff?

veecee · Post by **veecee** » Tue Sep 22, 2009 12:19 pm

to cool it down???

i agree with sokar's test! it rocks the neighbourhood!

but if you have to do it the girlpantz way then please jack up both sides of the rear end!

Draco · Post by **Draco** » Tue Sep 22, 2009 12:21 pm

What did they do with the LSD?(why would they take the cover off a LSD and not just replace the diff)

Why would an open diff need cooling?

veecee · Post by **veecee** » Tue Sep 22, 2009 4:56 pm

mashing gears covered in oil get hot. keeping it cool is not a bad idea!

is there any evidence that its been opened?

do the test man - either do a burnout/donut and look for 2 stripes, or jack up the rear and make sure the wheels turn in the same direction!

Draco · Post by **Draco** » Wed Sep 23, 2009 7:41 am

Burn out or do nut is not an obtion at the moment....left rear wheel bearing is on it's whay out.....

As soon as I have my jack back the car will go up for the check.

300sx · Post by **300sx** » Wed Sep 23, 2009 11:34 am

300ZX 84-86 MT and A/T (3.7) (R200)
300ZX 84-86 Turbo MT and A/T (3.54) (R200)
300ZX 87-89 MT and A/T (3.9 ) (R200)
300ZX 87-89 MT and A/T (3.9 ) (R200)
300ZX 87-89 Turbo MT and A/T (3.7 ) (R200)
Note Turbos:
#1) after 4/87 only-(3.7 Clutch Type LSD)
2) 88 All White SS used a 3.7 Viscous Coupling LSD)
3) LSD Unites Came With Finned Rear Covers

Draco · Post by **Draco** » Wed Sep 23, 2009 12:00 pm

300sx wrote:300ZX 84-86 Turbo MT and A/T (3.54) (R200)
Note Turbos:
3) LSD Unites Came With Finned Rear Covers

and that is the story....as i said...I am supposed to have an 3.54 open diff
but it has a finned cover.....

I'll have to do the test.....

300sx · Post by **300sx** » Thu Sep 24, 2009 8:19 am

yeah sorry, should have put a comment

what i meant was EVERY source says the finned covered diffs are lsd, so that must simply mean you have a lsd .. nuff said