1st drive in snow with '01 Limited

[phattyduck]

Is there anything wrong with staying in AWD (button pressed on 99 Limited) full-time throughout the winter? I started by turning it on and off as needed, but wonder if the engage/disengage might be wearing on the vehicle more than the full-time engagement. Thoughts?

You want to 'exercise' the actuators at least once a month (through the whole range, though you don't need to do a Hi-Lo shift - just 2WD, 4WDu, 4WDL).

Shifting isn't wearing anything, and leaving it in "AWD" mode is fine too - you will lose a bit of MPG, but that doesn't matter so much in the winter...

-Charlie

 

[3bears]

You want to 'exercise' the actuators at least once a month (through the whole range, though you don't need to do a Hi-Lo shift - just 2WD, 4WDu, 4WDL).

Shifting isn't wearing anything, and leaving it in "AWD" mode is fine too - you will lose a bit of MPG, but that doesn't matter so much in the winter...

-Charlie

when I lived in the lower 48, I would totaly agree that you need to "exercise" the system....turning it on and off and I did that often.. Now that I live not far from the north pole, not so far from santa.. I will leave them on till I can see the bare roads....until then...she's not coming out of 4wd. I WONT exercise the system. I want to make it home at night. Funny....for me...now....it might be I cant get it out of 4wd this spring....while you guys are complaing you cant get it into 4wd.

 

[T4R2014]

I think the problem here is that people think the center locker is something that part time 4wd systems do not have.

Let's make it clear, part time systems do not have a center locker because they do not have a center diff. Does this mean that all 4wd systems with a center diff have lockers? NO! The part time system is naturally locked in the same way that your femur bone cannot bend in the middle of it. It isn't possible, and trying to make it do the opposite is outside its realm of operation.

 

[Bad Luck]

I think the problem here is that people think the center locker is something that part time 4wd systems do not have.

Let's make it clear, part time systems do not have a center locker because they do not have a center diff. Does this mean that all 4wd systems with a center diff have lockers? NO! The part time system is naturally locked in the same way that your femur bone cannot bend in the middle of it. It isn't possible, and trying to make it do the opposite is outside its realm of operation.

Ummmm... What?... 2000 Limited so I have a center diff locker and it's part time 4wd.

 

[T4R2014]

Ummmm... What?... 2000 Limited so I have a center diff locker and it's part time 4wd.

Lmao this is fantastic.

 

[HiluxSurf SSR-G]

Just my 0.02:


Toyota has two types of part-time 4WD systems:


1. the type without a center diff. this type is the type used on many Toyota 4WDs including some Land Cruisers (mostly the old ones)

2. the one with the Multi-Mode transfer case. this type has a gear-type lockable center diff. Although this has AWD (H4 mode), it is still considered part-time because it has the option to disengage the front diff (H2 mode)

 

[toyotaspeed90]

Just my 0.02:


Toyota has two types of part-time 4WD systems:


1. the type without a center diff. this type is the type used on many Toyota 4WDs including some Land Cruisers (mostly the old ones)

2. the one with the Multi-Mode transfer case. this type has a gear-type lockable center diff. Although this has AWD (H4 mode), it is still considered part-time because it has the option to disengage the front diff (H2 mode)

You may want to.define better what you mean by #1.... the terms transfercase and center differential are pretty squishy when it comes to land cruisers.

All Fj60 and prior had a true 4wd transfercase and manual locking hubs in the front, even if they were vacuum chamber controlled for "front drive" (4wd). My 1971 FJ40 originally had a vacuum controlled FD transfercase but it was exactly the same as a stick shift - with the transfercase easily changeable.

The FJ80 and later all had full time 4wd transfercase, but had center locking differentials - which pretty much makes them a center differential.

These transfercases acted the same, essentially, as my 1988 Corolla Alltrac- it is 4wd full time with a center differential (only different in that the center diff is incorporated into the transmission) with a CDL... except it didn't have a high/low range.



I would not agree that an AWD (or full time 4wd, however you want to phrase it) is the same as a traditional transfercase that is in 4 wheel drive high.

The Landcruisers and 2000+ T4Rs get away with a "full time 4wd" because they have some form of traction control and/or VSC. As a wheel starts to slip the traction control can take over to ensure power is delivered to wheels with less traction.

 

[T4R2014]

<iframe width="560" height="315" src="https://www.youtube.com/embed/EBmw6Wpfe6M" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

 

[HiluxSurf SSR-G]

the gear-type center diff is found inside the transfer case. But not all transfer cases have a center diff. The ones without a center diff are the ones used in TRADITIONAL part-time 4WD systems either via the ADD or the manual/electric locking hub.

IIRC, the first LC that had Full-Time 4WD (center diff inside the HF2AV TC) was the LC80 but there were also LC80s in other countries that had a part-time 4WD system using manual locking hubs. I've seen LC70s that have the switch to engage the front locking hubs.

about H4:
I was referring to the ones with Multi-Mode 4WD (1999-2002) transfer case. for this case, H4 is AWD and H2 is 2WD. when the center diff is locked, it is H4L/L4L. On the transfer lever diagram (1999-2000), it is: H2-H4 / H4L / N / L4L.

I understand that in those transfer cases without the center diff, H4 is known as High-range 4WD and is equivalent to the Multi-Mode's H4L.

You may want to.define better what you mean by #1.... the terms transfercase and center differential are pretty squishy when it comes to land cruisers.

All Fj60 and prior had a true 4wd transfercase and manual locking hubs in the front, even if they were vacuum chamber controlled for "front drive" (4wd). My 1971 FJ40 originally had a vacuum controlled FD transfercase but it was exactly the same as a stick shift - with the transfercase easily changeable.

The FJ80 and later all had full time 4wd transfercase, but had center locking differentials - which pretty much makes them a center differential.

These transfercases acted the same, essentially, as my 1988 Corolla Alltrac- it is 4wd full time with a center differential (only different in that the center diff is incorporated into the transmission) with a CDL... except it didn't have a high/low range.



I would not agree that an AWD (or full time 4wd, however you want to phrase it) is the same as a traditional transfercase that is in 4 wheel drive high.

The Landcruisers and 2000+ T4Rs get away with a "full time 4wd" because they have some form of traction control and/or VSC. As a wheel starts to slip the traction control can take over to ensure power is delivered to wheels with less traction.

 

[eddielasvegas]

Thanks for posting this T4R2014. Very helpful.

4HI (a button push) on my '01 T4R will work just fine as long as none of your wheels will loose contact with the ground like in the video, otherwise engage the CDL to get true 4WD so that all wheels pull even if one has lost ground contact.


Eddie

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[Bad Luck]

I think the problem here is that people think the center locker is something that part time 4wd systems do not have.

Let's make it clear, part time systems do not have a center locker because they do not have a center diff. Does this mean that all 4wd systems with a center diff have lockers? NO! The part time system is naturally locked in the same way that your femur bone cannot bend in the middle of it. It isn't possible, and trying to make it do the opposite is outside its realm of operation.

Care to elaborate? I have a 2000 Limited so it's a part time 4wd system with a center diff lock.

Lmao this is fantastic.

What's fantastic is your inability to explain further for clarification.

 

[T4R2014]

Care to elaborate? I have a 2000 Limited so it's a part time 4wd system with a center diff lock.



What's fantastic is your inability to explain further for clarification.

Which is why it's called multimode. Think of it as a bonus 2WD option to the fulltime. Mitsubishi came up with the idea in 1990 (Super select) and all the Japanese brands rushed to come up with a competitor(Toyota with multimode, Isuzu with TOD, Nissan with All-mode). The video should explain the rest. For anymore clarification my rate is $100 per hour for a zoom call with white board illustrations.

 

[Bad Luck]

Which is why it's called multimode. Think of it as a bonus 2WD option to the fulltime. Mitsubishi came up with the idea in 1990 (Super select) and all the Japanese brands rushed to come up with a competitor(Toyota with multimode, Isuzu with TOD, Nissan with All-mode). The video should explain the rest. For anymore clarification my rate is $100 per hour for a zoom call with white board illustrations.

That's all great and everything but it's a part time 4wd system with a center diff lock which you said "Let's make it clear, part time systems do not have a center locker because they do not have a center diff." So how are you going to claim that when every 99-00 4wd Limited and every 01-02 4wd are part time 4wd with a center diff lock? I'm trying to have an intelligent conversation for clarification and you're being a ****ing twat with a stick up their ass.

I think the problem here is that people think the center locker is something that part time 4wd systems do not have.

Let's make it clear, part time systems do not have a center locker because they do not have a center diff. Does this mean that all 4wd systems with a center diff have lockers? NO! The part time system is naturally locked in the same way that your femur bone cannot bend in the middle of it. It isn't possible, and trying to make it do the opposite is outside its realm of operation.

 

[phattyduck]

That's all great and everything but it's a part time 4wd system with a center diff lock which you said "Let's make it clear, part time systems do not have a center locker because they do not have a center diff." So how are you going to claim that when every 99-00 4wd Limited and every 01-02 4wd are part time 4wd with a center diff lock? I'm trying to have an intelligent conversation for clarification and you're being a ****ing twat with a stick up their ass.

The only clarification is that normal part-time 4WD systems don't have a center diff. Any road-going full-time 4WD will have a center diff (and associated locker or it would be AWD, not 4WD). The multi-mode case doesn't fit into either category.

-Charlie

 

[Cree]

He's saying the part time systems (VF2A's) do NOT have a center differential. And he's right, they don't. It's either engaged or it's not. With a Multi-Mode (VF3A's), it's a differential style case.

No Differential = True 4WD
Differential = AWD OR 4WD

When people refer to "Part Time" or "Full Time" 4WD, they're talking about what kind of road conditions you can operate it on. You can't operate a non differential (True 4WD) case "full time", hence "Part Time". You CAN run a differential case "Full Time". Once you engage the CDL it functions exactly like a "Part Time" System.



My argument has never been that the CDL is or isn't a differential or a locking mechanism, it's that it's not some feature that was some kind of magical option on the later 3rd Gens. It's literally the design.

 

[T4R2014]

That's all great and everything but it's a part time 4wd system with a center diff lock which you said "Let's make it clear, part time systems do not have a center locker because they do not have a center diff." So how are you going to claim that when every 99-00 4wd Limited and every 01-02 4wd are part time 4wd with a center diff lock? I'm trying to have an intelligent conversation for clarification and you're being a ****ing twat with a stick up their ass.

A part time system doesn't have a center diff broski. 99-00 Limited and 01-02 4wd are multimode.

 

[HiluxSurf SSR-G]

I would disagree on this. If a vehicle, say a USDM UZJ100, which is a full-time 4WD vehicle goes offroad and locks the center diff, it DOESN'T become a part-time 4WD. it is STILL a full-time 4WD vehicle. If a 2000 4Runner Limited goes offroad and engages 4WD & locks the center diff, it is still a part-time 4WD vehicle but is in H4L mode

To me, a part-time 4WD is a vehicle that has the option to disengage the front axle and run using 2WD mode, while a full-time 4WD is a vehicle that has NO option to run on 2WD mode.

When people refer to "Part Time" or "Full Time" 4WD, they're talking about what kind of road conditions you can operate it on. You can't operate a non differential (True 4WD) case "full time", hence "Part Time". You CAN run a differential case "Full Time". Once you engage the CDL it becomes a "Part Time" System.

 

[T4R2014]

I would disagree on this. If a vehicle, say a USDM UZJ100, which is a full-time 4WD vehicle goes offroad and locks the center diff, it DOESN'T become a part-time 4WD. it is STILL a full-time 4WD vehicle. If a 2000 4Runner Limited goes offroad and engages 4WD & locks the center diff, it is still a part-time 4WD vehicle but is in H4L mode

To me, a part-time 4WD is a vehicle that has the option to disengage the front axle and run using 2WD mode, while a full-time 4WD is a vehicle that has NO option to run on 2WD mode.

Agreed here. I think what Cree is trying to get at is that an engaged part time 4WD system and a locked center full time 4WD system achieve the same basic function in terms of traction. We are working with very precise definitions here.

 

[Cree]

Agreed here. I think what Cree is trying to get at is that an engaged part time 4WD system and a locked center full time 4WD system achieve the same basic function in terms of traction. We are working with very precise definitions here.

Correct.

Also, I'm speaking SPECIFICALLY about 3rd Gens and how their systems function. Reasons I referenced t cases.

 

[Bad Luck]

A part time system doesn't have a center diff broski. 99-00 Limited and 01-02 4wd are multimode.

Was that so hard to say instead of implying I need a drawing or laughing? Then what does it have that allows the transfer of power to the front axle when in 4Hi?