Limited Slip in 1999 100 Series

[spressomon]

I am going to change the diff lube this weekend on my 1999 100 LC. Without testing each, are both differentials typically "limited slip" on this year/model? If so I would assume I need to use either a limited slip type lube or the limited slip additive?

 

[hank14]

I believe the rear without the factory electronic locker was a limited slip diff.
The front diffs on all 98-99 models are open and only require regular gear lube.

 

[Landpimp]

Lexus got the LS, not the Cruiser, it was open or locked, not LS

(I think)

 

[CruisinGA]

most gear lube i've seen has the ls additives..

the $20 5 gallon bucket coastal stuff I use in everything (open, locked, 40/80 whatever) has the LSD additives...

A lube with the additives won't have any effect on a diff without an LS, so you might as well just dump some in there with the additives and be done.

 

[hank14]

I checked the FSM at home, 1999 Landcruiser. It shows a rear differential carrier with limited slip diff, hypoid gear oil LSD API GL-5, 3.49 US qt capacity. SAE 90 above -18 degrees C. SAE 80W-90 or 80W below -18 deg. C.

Rear differential carrier w/ diff lock, hypoid gear oil API GL-5, 3.38 US qt capacity same weight as above.

Front differential carrier, hypoid gear oil API GL-5, 1.80 US qt capacity, same weights as above.

Hope that doesn't muddy the water.

 

[SINCITY100]

Hmmmm...How about throwing the rear LSD unit in a 2000 with traction control ??

Does anyone see an added benefit of LSD working alongside TRAC ?

 

[SINCITY100]

Hmmmm...How about throwing the rear LSD unit in a 2000 with traction control ??

Does anyone see an added benefit of LSD working alongside TRAC ?

Hmm..either its a really stupid question, no-one can find a logical answer, Or I am really hated in here...I will have to flip a coin on this one...


SINCITY100= not a jerk, just misunderstood ...lol..

 

[ChuckB]

talk to shotts he has an ARB'd 2000 HTH

 

[NMuzj100]

I think everyone was waiting for someone who knows why this won't work to chime in. I have no such knowledge but....

I see no possible benefit to adding a limited slip to a TCd cruiser. ARBs are better even when not locked up because they are a stronger differential unit.

Can you feel the love now?

Also along the same lines - Are the rear diffs limited slips even with the rear e-locker and if not why not?

 

[bjowett]

The LSD could be of benefit in a vehicle with TCS, it should allow for more grip and would push the threshold at which the TCS kicks in to a higher level.

I have pulled a few Toyota 8" 4 pin LSDs from Supras with well over 100k miles, the clutch and drive plates have showed minimal wear, and met new spec. The 9.5" 4 pin LSD Cruiser diff is bound to be even more beefy and can even be shimmed for more performance/less slip.

 

[tabraha]

I imagine if you're gonna spend the money to get the LSD it wouldn't be that much more expensive to go ARB, which would put you up to the next level when paired up with trac. I'd save up for a bit longer and go all out if I'm gonna bother to crack open the pumpkin. I will say though i've been EXTREMELY pleased with my limited slip in the 100 though. I like the fact that it will work when I need it without pushing buttons and waiting for engagement as with the e-locker on my Taco.

I didn't want to be the first to chime in; that's all

 

[SINCITY100]

Thanks for the input guys...(and the love...lol)

I agree that it would be foolish to buy a Brand new LSD unit from Toyota, when a ARB is so close in price (heck, the ARB might actually be cheaper !)

But...lets just suppose that "somebody" has a wrecked `99 LX in their possesion...would that be reason enough (free) to try it out ?

Its the labor that I am worried about ( I am lazy, and my buddy drinks VERY expensive beer) and whether or not it would interfere with the TRAC system..
I know that if I wait until my OE rear diff (takes a dump) to make the swap, I will be waiting a LONG time !!.....

But, on the other hand... I have always wanted to be a Guinea pig (see the thread on my muffler swap) ..lol

Thanks again

 

[ShottsUZJ100]

Thanks for the input guys...(and the love...lol)

I agree that it would be foolish to buy a Brand new LSD unit from Toyota, when a ARB is so close in price (heck, the ARB might actually be cheaper !)

But...lets just suppose that "somebody" has a wrecked `99 LX in their possesion...would that be reason enough (free) to try it out ?

Its the labor that I am worried about ( I am lazy, and my buddy drinks VERY expensive beer) and whether or not it would interfere with the TRAC system..
I know that if I wait until my OE rear diff (takes a dump) to make the swap, I will be waiting a LONG time !!.....

But, on the other hand... I have always wanted to be a Guinea pig (see the thread on my muffler swap) ..lol

Thanks again

The ARB is a much stronger diff. Big plus!

As for LSD with TRAC? I see VERY little room for improvement on a 100 with TRAC. I'd not be surprised if a LSD would decrease TRAC's affectiveness because the LSD would offer some "control" to traction and I doubt it would offer more than letting TRAC do everything on it's own with an open diff. No proof of this though. Nothing though competes with a TRAC - ARB locker combo.

 

[SINCITY100]

The ARB is a much stronger diff. Big plus!

As for LSD with TRAC? I see VERY little room for improvement on a 100 with TRAC. I'd not be surprised if a LSD would decrease TRAC's affectiveness because the LSD would offer some "control" to traction and I doubt it would offer more than letting TRAC do everything on it's own with an open diff. No proof of this though. Nothing though competes with a TRAC - ARB locker combo.

Great point Shotts...

Trac works so well by itself, It makes sense that an LSD unit could conflict (with the Trac program) by locking "in and out" as it deems necessary..I am sure that the guys @ Toyota already tested every imaginable combo before production of the 2000-up models, making sure it was as effective as possible...but why do you suppose they dropped lockers, even with Trac? I bet it had to do with the "market" that these vehicles are targeted towards (I.E. turn key and drive...go virtually anywhere you need to with minimal driver effort)

I think I will spend my time and effort on a more effective Mod ( rear-locker) as you said

BTW..Today I took a buddy out "wheeling" and he followed me w/his 90 4Runner, it had a set of brand new michelin MTR`s w/an aftermarket lsd unit in the rear, he was bragging about what he could go up with them (tires).... I SLAUGHTERED the Runner on the VERY FIRST hill, even though I was in 4HI (without the center locker engaged)...He actually got out and made sure that his hubs were locked in .. and ended up taking the "alternative way" around the hill to follow me...he was so perplexed how a 5500lb luxury suv with 60 series street tires could EASILY out-climb his rig...

Did I mention....I LOVE MY 100 !!!!!!!!!!

 

[NMuzj100]

The 9.5" 4 pin LSD Cruiser diff is bound to be even more beefy and can even be shimmed for more performance/less slip.

OK - We're waiting for the "How to shim the LSD for better performance" thread to come out.

But...lets just suppose that "somebody" has a wrecked `99 LX in their possesion...would that be reason enough (free) to try it out ?

But, on the other hand... I have always wanted to be a Guinea pig (see the thread on my muffler swap) ..lol

I would love to see the experiment ! It would be important to thoroughly test the open diff with traction control and the LSD by themselves first (by itself a worthwhile goal) to see if there is any change or improvement in performance.

 

[SINCITY100]

OK - We're waiting for the "How to shim the LSD for better performance" thread to come out.




I would love to see the experiment ! It would be important to thoroughly test the open diff with traction control and the LSD by themselves first (by itself a worthwhile goal) to see if there is any change or improvement in performance.

Ahh, man !!

Here I just made up my mind, and now I feel the pressure to be the Guinea pig again !!

If it didn`t work out as well (as the stock set-up), this will cost me BIG in the beer department to switch it back !!

 

[NMuzj100]

Ahh, man !!

Here I just made up my mind, and now I feel the pressure to be the Guinea pig again !!

If it didn`t work out as well (as the stock set-up), this will cost me BIG in the beer department to switch it back !!

But you'll be a man around here. By the third time R&R of the rear diff won't be that tough and you could probably do it yourself with your drinking friend bringing the beer to cheer you on.

 

[ShottsUZJ100]

Great point Shotts...

Trac works so well by itself, It makes sense that an LSD unit could conflict (with the Trac program) by locking "in and out" as it deems necessary..I am sure that the guys @ Toyota already tested every imaginable combo before production of the 2000-up models, making sure it was as effective as possible...but why do you suppose they dropped lockers, even with Trac? I bet it had to do with the "market" that these vehicles are targeted towards (I.E. turn key and drive...go virtually anywhere you need to with minimal driver effort)

I think I will spend my time and effort on a more effective Mod ( rear-locker) as you said

BTW..Today I took a buddy out "wheeling" and he followed me w/his 90 4Runner, it had a set of brand new michelin MTR`s w/an aftermarket lsd unit in the rear, he was bragging about what he could go up with them (tires).... I SLAUGHTERED the Runner on the VERY FIRST hill, even though I was in 4HI (without the center locker engaged)...He actually got out and made sure that his hubs were locked in .. and ended up taking the "alternative way" around the hill to follow me...he was so perplexed how a 5500lb luxury suv with 60 series street tires could EASILY out-climb his rig...

Did I mention....I LOVE MY 100 !!!!!!!!!!

Hee Hee. That's a typical 100 story. Luv it. And to all who discredit the 100 for whatever reason......once they see one wheel or wheel in one.....they shush a der mouthas!! (This includes Cruiser owners too. )

TRAC and VSC was added for 2 reasons I believe.
1. VSC stopped the tipping on 2 wheels in abrupt manuevers. (Therefore gaining them an "acceptable" and actually a "recommended" rating in Cons Rpts.)
2. To make driving the 100 almost brainless. They left the center locker (thank god) but with the electronics they didn't need the added "do I lock the rear or not? scenario. Think of all the rear locker use questions on this forum?