LSD?????????

[TRD 2000GT]

Yeah im getting the clutch done at the moment and I think the oil needs changing. The guys doing it said to stay away from Redline with the LSD.

At the moment in reverse it makes a bit of low tone screeching noise - is that oil related??

[tonigmr2]

Well Redline do two types of oil for different types of LSD and non-LSD cars, so don't know why you were given that advice.

Screeching in reverse...doesn't sound very normal. See if it does it still after a good quality oil change.
T

[TRD 2000GT]

Ah right - fair enough, they probably didn't know that then.

It doesn't always do it so hopefully it is just the oil.

[Lauren]

Around tight corners it will clunk pretty loud - Everyone who has seen me take roundabouts or corners can see it lock then unlock.

Make sense?

Plate type lsd as J&K said. Mine used to lock up very easily at slow speeds and you could feel it wind out when pulling away from T-junctions etc. Never had any probs with it actually locking up round roundabouts, so maybe you've got a really tight LSD in there?

Yep thought that rev2 was plate type rather than viscous hence my reply about wheels going in the same direction.

[MegatronUK]

Around tight corners it will clunk pretty loud - Everyone who has seen me take roundabouts or corners can see it lock then unlock.

Make sense?

Plate type lsd as J&K said. Mine used to lock up very easily at slow speeds and you could feel it wind out when pulling away from T-junctions etc. Never had any probs with it actually locking up round roundabouts, so maybe you've got a really tight LSD in there?

Yep thought that rev2 was plate type rather than viscous hence my reply about wheels going in the same direction.

The rev2 onwards uses the later gearbox so it has the same LSD as the rev3; i.e viscous coupled (this is the version with the hexagonal bar when you look through the gearbox). It's the rev1 with the earlier gearbox that has the plate diff (this has a small circular hole through the centre of the gearbox; whereas the non-lsd is clear all the way through) - but it doesn't seem to be very common, unlike the later boxes.

Unfortunately mine is broken at the moment... but while it was working it did seem quite aggressive and it certainly did donuts no problem

[Lauren]

The rev2 onwards uses the later gearbox so it has the same LSD as the rev3; i.e viscous coupled (this is the version with the hexagonal bar when you look through the gearbox). It's the rev1 with the earlier gearbox that has the plate diff (this has a small circular hole through the centre of the gearbox; whereas the non-lsd is clear all the way through) - but it doesn't seem to be very common, unlike the later boxes.

Unfortunately mine is broken at the moment... but while it was working it did seem quite aggressive and it certainly did donuts no problem

ah okay, i stand corrected. Yep am familiar with teh rev1 lsd box because it is based on the SC box... so know what you mean about the small hole through the centre.

[MegatronUK]

Yeah, thats the fella.

[cammie]

thanks guys all your replys are much appreciated!!!! =D>

[Drshifty]

I've always wondered about mine, its a rev 1, it clunks quite alot and feels pretty planted at the back all of the time.

Certainly if I boot it up the gravel road I live on then I get two straight lines about twenty odd feet long does that suggest its got a slipper in it?

[jonb-]

I've always wondered about mine, its a rev 1, it clunks quite alot and feels pretty planted at the back all of the time.

Certainly if I boot it up the gravel road I live on then I get two straight lines about twenty odd feet long does that suggest its got a slipper in it?

Would suggest a limited 'slipper', yes.

Strangely, I thought my rev3 had the standard LSD but today I jacked it up and span one wheel. After a small amount of free play i felt a clunk and the second wheel started spinning the same way.

Anyone want to take my gearbox off and find out what diff i have?

[FreeFall]

I'll take it off - but you'll have to put it back on yourself

[jont]

Strangely, I thought my rev3 had the standard LSD but today I jacked it up and span one wheel. After a small amount of free play i felt a clunk and the second wheel started spinning the same way.

Anyone want to take my gearbox off and find out what diff i have?

Snap. I thought my rev 3 was standard, read through all the posts etc, but indeed, when you jack it up and spin one wheel, there's a bit of free play, then the other goes the same way.

Let me know if you work out what's going on!

[Lauren]

Strangely, I thought my rev3 had the standard LSD but today I jacked it up and span one wheel. After a small amount of free play i felt a clunk and the second wheel started spinning the same way.

Anyone want to take my gearbox off and find out what diff i have?

Snap. I thought my rev 3 was standard, read through all the posts etc, but indeed, when you jack it up and spin one wheel, there's a bit of free play, then the other goes the same way.

Let me know if you work out what's going on!

If it does goes the same way then LSD. Put it this way, open diff cars will always turn the other wheel in the opposite direction.

Thought from what others ahve said this only worked on plate type LSDs?

[jont]

Let me know if you work out what's going on!

If it does goes the same way then LSD. Put it this way, open diff cars will always turn the other wheel in the opposite direction.

Thought from what others ahve said this only worked on plate type LSDs?

That was both Jon's and my point. We both (think we) have standard rev 3 diffs, which are supposed to be viscous. Opinion seems to be that viscous diffs will behave like open diffs if you jack the back of the car up and try turning the wheels (ie turn in opposite directions), but we see them behave like a plate LSD (ie both wheels turn the same way). There's no question of whether we've got LSDs or not, just which type.

[jonb-]

Let me know if you work out what's going on!

If it does goes the same way then LSD. Put it this way, open diff cars will always turn the other wheel in the opposite direction.

Thought from what others ahve said this only worked on plate type LSDs?

That was both Jon's and my point. We both (think we) have standard rev 3 diffs, which are supposed to be viscous. Opinion seems to be that viscous diffs will behave like open diffs if you jack the back of the car up and try turning the wheels (ie turn in opposite directions), but we see them behave like a plate LSD (ie both wheels turn the same way). There's no question of whether we've got LSDs or not, just which type.

Exactly I've no other symptoms to suggest i've a aftermarket diff in there, no clucking or skipping at full lock etc.

Perhaps the general opinion that the vicous diff fails the 'diff test' is incorrect, though that said i get the theory.

[MegatronUK]

If it does goes the same way then LSD. Put it this way, open diff cars will always turn the other wheel in the opposite direction.

Thought from what others ahve said this only worked on plate type LSDs?

That was both Jon's and my point. We both (think we) have standard rev 3 diffs, which are supposed to be viscous. Opinion seems to be that viscous diffs will behave like open diffs if you jack the back of the car up and try turning the wheels (ie turn in opposite directions), but we see them behave like a plate LSD (ie both wheels turn the same way). There's no question of whether we've got LSDs or not, just which type.

Exactly I've no other symptoms to suggest i've a aftermarket diff in there, no clucking or skipping at full lock etc.

Perhaps the general opinion that the vicous diff fails the 'diff test' is incorrect, though that said i get the theory.

No, the theory is correct - viscous coupled limited slip diffs do behave as open diffs. The diff will act as an open diff until torque is applied; then it will start to progessively lock - you won't be able to do that by hand

Interestingly something similar happens on the GT4 rear axle if you rotate the propshaft - both wheels rotate in the same direction. However, if you turn one wheel or driveshaft by hand, the other wheel will turn in the opposite direction. Wierd huh?

[skinthespin]

Can I just throw something in that worried me regarding oil, there are gearbox oils and LSD oils, LSD oils sould not be used in an MR2 gearbox even one with an LSD as these are designed purely for differentials, not gearboxes and are much thicker (or thinner, cant remember which!). The MR2 LSD is inside the gearbox and as such was designed to run on the gearbox oil.

Im sure someone will correct me if they think im wrong....

[Lauren]

Can I just throw something in that worried me regarding oil, there are gearbox oils and LSD oils, LSD oils sould not be used in an MR2 gearbox even one with an LSD as these are designed purely for differentials, not gearboxes and are much thicker (or thinner, cant remember which!). The MR2 LSD is inside the gearbox and as such was designed to run on the gearbox oil.

Im sure someone will correct me if they think im wrong....

You can though get gear oil which is for LSDs that run in a transverse application. I know i had to for my old SC. IIRC was Castrol LS.

[jonb-]

I tested another stock rev3 with 'standard LSD' last night and both wheels rotated the same way again.

The plot thickens for the viscous diff test...

[Drshifty]

I wouldn't be at all surprised if the viscous test changed with temp and gear oil consistancy...

Its basically a hydraulic clutch like and auto box right?