Have I damaged anything?

Before I get on, I have searched 4hi top speed here. I understand the manual says, at least for my turdgen that I shouldn't exceed 100kph (60mph) in 4hi. The problem is that before I checked the actual speed your allowed to travel, I've taken my "buddies" advice. We get a lot of rain here in Vancouver and when it's an insane downpour and I'm on the HWY I'm usually doing 110-120kph in 4hi. So my question is for anyone that has experience with this, does Toyota put a cap on the speed at 100kph so we don't excessively speed in 4hi or will it actually damage the 4wd system? Yes I know , if you need 4hi you probably don't need to be travelling faster then that but I'm just curious if I've done any damage. Thanks guys!

 

You only need to be under 60mph to engage 4H. After that, drive faster if you wish.

 

That reads the same as mine...you need to be below 60 to engage the 4hi....nothing about a top speed once you are engaged in 4hi

 

Okay awesome. Thank you!

 

Well... I think the statement, "2WD (to) 4WD Keep Vehicle Speed Below 60mph or 100kph" means what it says. You keep it below that speed. I don't think it has anything to do with the speed you engage the transfer case.

Artimus: If I'm reading this correctly, I don't think you're going to damage your rig unless you do this frequently.

Chime in, troops.

SB

 

It's under the section about shifting the tcase. As others said, under 60 to shift, drive as fast as you want after.

 

Yeah, I see it there too... I'm one of the minority of folks (I think) on this forum that have actually read the 640 page manual. Here it is. I wonder what Toyota says about it.

Shifting from “2WD” to “4H”

1. 1 Reduce vehicle speed to less than 62 mph (100 km/h).
   

 

I usually read the whole manual before I take delivery of a vehicle

Worst is when I bought my Lexus LX and ls
Their navigation manual is longer than owners manual

 

Keep it below 60 to SHIFT into 4Hi, then you can go as fast as you want. If you try to shift into 4Hi above 60, it'll yell at you and not shift. Once you're in 4Hi, you can go faster and you'll be fine.

 

People use 4wd in the rain? Am I missing something, is this normal?

 

rain is their excuse for 4x4... they have to meet their 10 miles/month quota.

 

See above. Lubing the system.

 

...never heard of this myself either.

 

Iv hit big puddles and began to hydro plane and notice a huge difference being in 4x4 vs 2wd. You gain alot more control. Sometimes you just need to see what works better for you. But to confirm what others have said about the 100 kph it's just telling you that to get into 4x4 from 2wd you need to be traveling under that speed to successfully engage. I drive 4x4 even in the summer time just for a quick 5 mins if I hadn't used it in over a month just to keep fluids moving and parts moving. (Maintenance) these are great trucks if you treat them good. I'm picking up a white 2017 trd sport Mt Tuesday . I'm coming from a 2014 sport .Wooo excited

 

Bad move. Stick with the tried and true

 

I agree with others that have said go as fast as you want once in 4wd. I have also read the manual multiple times and it only has to be under 60 mph to engage 4hi. From other TW members recommendations and knowledge if you use 4hi for your monthly maintenance on dry pavement, only engage when your driving straight, turning on dry pavement while 4wd is engaged is when you can cause damage because you need your front wheels to be able to slip to keep strain off the transfer case and other components of the front 4wd components. In the rain as you have been doing you should be just fine.

 

Thanks for all the advice guys, very much appreciated. As for the rain, here our highways in some parts are very uneven and "bumpy" if you wanna call it that so when it rains (downpour) on some parts of the HWY in 2wd I get bad hydroplane. Putting on 4hi it works great for me. To each their own.

 

4hi in the rain? I've never once had an issue in 2wd in vancouver.

 

I understand the thinking behind this, but I can't wrap my head around how it would actually help. Hydroplaning shouldn't be affected in any way by which wheels have power. It is a tire/water thing. It is road contact related and the situation isn't even "aware" of whether the tire is powered-rotating or unpowered-rotating. FWIW, internet "research" agrees. It is a good excuse to burn some extra gas and get your monthly 4WD miles though.

Edit: one situation I could see it used is the first rain after a drought when the roads are literally slippery with residue. It "may" keep you from failing to enter traffic appropriately. That is totally unrelated to hydroplaning and only applies to starting out speeds where you give it gas and the rear breaks free.