JZiggy's "Grown Up" 4Runner Build

JZiggy said:

3RZ Oil cooler and oil filter base overhaul writeup:

One of the projects on my to-do list was to replace the o-rings in the oil cooler and filer mounting base on the side of my 3RZ.

:tea:

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owyheerat said:

JZiggy, wow! I just read thru your entire thread. Great job and attention to detail. Some really nice work.

BTW, I own the twin to your 4runner, only in silver.

What made you think of replacing the o-rings and hoses in your oil cooler? Were there symptoms? It makes me wonder if I need to do this to my 4runner.

Thanks and again, great build.

Durwin

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owyheerat said:

JZiggy, wow! I just read thru your entire thread. Great job and attention to detail. Some really nice work.

BTW, I own the twin to your 4runner, only in silver.

What made you think of replacing the o-rings and hoses in your oil cooler? Were there symptoms? It makes me wonder if I need to do this to my 4runner.

Thanks and again, great build.

Durwin

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rightyouareken said:

Pardon my complete ignorance, but can you explain why you switched to manual front hubs? Are they somehow more robust/reliable than the originals?

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JZiggy said:

It also lets you use 4LO in high traction situations like steep driveways./QUOTE]

I think you explained this to me once, but I forgot - what does this really mean?

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4Runner4Leon said:

JZiggy said:

It also lets you use 4LO in high traction situations like steep driveways./QUOTE]

I think you explained this to me once, but I forgot - what does this really mean?

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I believe it means he can use 4Lo for situations where he wants more torque while essentially just using rear wheel drive, without worrying about being on pavement, because his front hubs are disconnected.

Interestingly I notice that according to the owners manual the multimode transfer cases can also use 4Lo with the center diff unlocked, essentially providing the same capability (using 4lo on bare pavement).

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rightyouareken said:

4Runner4Leon said:

I believe it means he can use 4Lo for situations where he wants more torque while essentially just using rear wheel drive, without worrying about being on pavement, because his front hubs are disconnected.

Interestingly I notice that according to the owners manual the multimode transfer cases can also use 4Lo with the center diff unlocked, essentially providing the same capability (using 4lo on bare pavement).

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I see - but what's wrong with putting it in 4LO on dry pavement? Is that a no-no for some reason? I've seen the warnings against engaging the e-locker on dry pavement, but not 4LO.

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4Runner4Leon said:

rightyouareken said:

I see - but what's wrong with putting it in 4LO on dry pavement? Is that a no-no for some reason? I've seen the warnings against engaging the e-locker on dry pavement, but not 4LO.

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On the '99 and lower models (someone correct me if I'm wrong), when you shift it into 4wd (Hi or Low) the transfer case locks the front and rear drive trains. This will cause binding in your drive train if your front and rear wheels are not on a slippery surface (pavement) potentially breaking your transfer case. It basically locks your front and rear differentials together. The 2000-2002 models have a multi-mode transfer case that allows you to unlock the front and rear drive trains, giving you an additional AWD option when on pavement.

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4Runner4Leon said:

rightyouareken said:

I see - but what's wrong with putting it in 4LO on dry pavement? Is that a no-no for some reason? I've seen the warnings against engaging the e-locker on dry pavement, but not 4LO.

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Traditional transfer case in 4LO is a no-no because it binds on dry pavement, specifically while turning. Multimode w/ unlocked center diff allows the front and rear driveshafts to rotated independently so there’s no binding, aka AWD.

Manual hubs (unlocked) with the transfer case in 4lo allows you to essentially use 2WD in low gear (2LO) for better torque to the ground at lower speed. Good for a steep driveway or boat ramp, etc.

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4Runner4Leon said:

Thanks guys, that makes sense. But the owner's manual recommends engaging the 4WD every once in a while for a few miles (presumably on dry pavement is OK). So is this only a concern when in 4LO (or L4, as Toyota calls it), not in 4HI (H4)?

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Dezert4Runner said:

Manual hubs (unlocked) with the transfer case in 4lo allows you to essentially use 2WD in low gear (2LO) for better torque to the ground at lower speed. Good for a steep driveway or boat ramp, etc.

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phattyduck said:

The '01/'02 4WDs allow for 4LO-unlocked, the '99/'00 Limited 4WD doesn't allow for it in stock form.

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phattyduck said:

I'd use 4WD (Hi or Lo, doesn't matter) on a boat ramp... the rear tires are probably in the wet and front traction would be helpful.

The '01/'02 4WDs allow for 4LO-unlocked, the '99/'00 Limited 4WD doesn't allow for it in stock form.

-Charlie

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Dezert4Runner said:

Good info on the multi mode case differences. I’m not up to par on the nuances since I have a j shift manual t-case. So the 99/00 have the center diff locked if it’s in 4HI/LO by default? Not selectable?

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