switching into 4wd makes a loud bang

S

SnakZ

New member
its a used 2003 V6 4runner and have been doing it from the day i got it a few mouths ago it would be rare for it not to make any bang sounds and this bang would even make the 4runner move as if u got hit lol this would happen even when stop and i believe even in N (have to try again) im a bit afraid of putting it in 4wd with out knowing if its braking something

I have not change the Transfer fluid yet as i dont have the money for it
and i do know that the 4runner used to be a rental so who know what was done to it lol as of right now it has 119k mils on it

ty for any help with this


Update:
Its not as bad when going out of 4wd and if at highway speed when dropping out of 4wd it does it with out any sounds
 
Last edited:
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You shouldn't shift into 4wd from neutral or a dead stop, even moving into low range you should be moving 1-5mph to allow the gears in the transfer case mesh. It also alleviates pressure from the shift fork.

Confirm with your owners manual though, this is my first Toyota and all my experience comes from NVG and NP transfer cases that Ford/GM/Dodge use.
 
i know on a few post people have said its better to do it in neutral
idk lol

and it still does it even when moving slow or fast lol not as bad at highway speed but i hear thats not the best thing to do as it puts more wear on it

changing into 4L has to be done at a dead stop
so i would think changing into 4H can be done at a dead stop to as u would need to change into 4H before 4L ? even w
 
Toyota must use something other than New Process transfer cases then. Like I said check your owners manual

Ok so I searched and all I could find is you have the same T3 center diff that my AWD v8 has but I still haven't found anywhere that tells me what transfer case it uses
 
If you do not regularly use/turn on the 4x4 then it can be a "hard shift" when it comes on. The best way to fix it is to work it out and check it. Just driving down the road turn it on, drive a couple miles, then it off. Repeat. I like to check the cv boots to make sure aren't leaking.

Sometimes you have to turn the wheels ever so slightly to engage or disengage the electronic 4 wheel drive.

Hope this helps
 
Sorry if I give out any wrong info I'm used to domestics but I am diligently searching to confirm my post are accurate. I still say you should be rolling when you shift if it's anything like a conventional transfer case
 
NorthGa4R said:
If you do not regularly use/turn on the 4x4 then it can be a "hard shift" when it comes on. The best way to fix it is to work it out and check it. Just driving down the road turn it on, drive a couple miles, then it off. Repeat. I like to check the cv boots to make sure aren't leaking.

Sometimes you have to turn the wheels ever so slightly to engage or disengage the electronic 4 wheel drive.

Hope this helps
Click to expand...


i had the CV boots replace just a few mouths ago so they better not be lol

i will try the working out thing

can this be from the Transfer fluid? as i dont know if its been change
 
So google shows that Tacoma/4runner/tundra all have chain driven transfer case! So yes you should be rolling just a bit to aid the transfer case shifting. Think of the transfer case like shifting a bicycle, can you shift hears on your bike without pedaling?
 
Toyota only uses Toyota/aisin tcases. The more you uses it the better they work and it does shift easier when moving. I exercise my tcase an avg of 5 times a week. Doesn't make a peep when I shift. I run 90w135 gear oil also.
 
Not sure what type of 4Runners you guys are driving but in my 07 V8 it specifically says on my drivers sun visor to stop shift into neutral and then shift into 4lo

are you guys talking about the V6 shifting into 4 high?
 
Yes. 2hi to 4hi should be moving. 4hi to 4lo should be stopped. When going to 4hi you are simply meshing gears. Going to 4lo the gear ratio is actually changing. If the vehicle is moving this puts a lot of stress on the drivetrain. The 4wd ecu won't even let you change down going at more than a slow crawl.
 
I have an old 03 with about 135k on it and it sometimes can clunk pretty good going into 4hi. Sometimes a bang. But hey that means it's in right? ;). No but i found coasting about about 10mph in neutral helps some but it definitely bangs sometimes but it's always worked.
 
My old T100 with 150k miles, would sound like a shotgun blast when I hit 4hi. I liked it that way.
 
rebelbowtie said:
wow i am not the only one that is smart enough to know you need to be rolling a little bit.
Click to expand...

I think people are not reading the manual. You can shift from 4hi to 2hi at any speed, but shifting from 2 hi to 4 hi you should be traveling no faster than 100 km/hr. if you are going faster than that, it won't shift until you slow down and are below 100 km/hr.

Going from 4hi to 4lo, stop the car, shift to neutral, and then change selector to 4lo.


All this info is attached on the sun visor.
 
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