Bad noise from tranny?

[Carl_G]

I'll try to write it in lamens terms. Perhaps my use of "on" and "work" is confusing some of you.

Can you guys please report this to the moderator as well. Even his new name is offensive.

 

[PrepareYourAnus]

Can you guys please report this to the moderator as well. Even his new name is offensive.

What are you talking about? How is it offensive?

 

[klennop]

I am fine with the screen name as long as his mouth stays in check, which so far it has. Maybe I am one of the, glass half full type of guys?

 

[Carl_G]

I am fine with the screen name as long as his mouth stays in check, which so far it has. Maybe I am one of the, glass half full type of guys?

He has posted about 15 times today it's hilarious!

(all between 4:53 and 9:13 this morning!)

 

[PrepareYourAnus]

He has posted about 15 times today it's hilarious! "Trying to establish a new reputation in a hour or less"

I'll watch my mouth tell me when you look at my avatar you don't laugh.

 

[zstampe]

I'll watch my mouth tell me when you look at my avatar you don't laugh.

Why the hell are you up posting at 4:53 am ha ha? Nice avatar.

 

[jwyshrek]

I'll try to write it in lamens terms. Perhaps my use of "on" and "work" is confusing some of you.

I'm also getting the sense that the acronym 'ATRAC' might be misused here. I guess people call the system ATRAC all the time because it is easier to remember or someone started doing that.

Sort of like sodium and salt (common table salt, NaCl). Sodium is NOT the same as salt.

So are you saying...4wd/diff lock the 'system' is ATRAC mode?
and
4wd/diff unlocked (still could be limited slip) = just standard traction control...or as some called it...TRAC?

Maybe that is the problem ATRAC and TRAC are too similar...maybe they should have give them completely different acronyms...

 

[JB.]

Yes the slip light comes on and beeping can be heard, but not all the time. Sometimes you just hear grinding and the vehicle goes no where. If I am pulling just the boat trailer out of the water (800lbs?), it all slips and the car goes no where. Mind you, the wheels aren't slipping on the ground. This is a full time 4wd vehicle and I would know when that happens. The center dif was not locked.

My wife was on a McDonalds (I know, I'll have to break her of that habit) speedbump yesterday, pressed the gas to get over it and just heard gears grinding, but it did go over the bump. So something is up. It is actually at the dealership now being looked at.

Ignore the acronym discussion. ATRAC (and VSC) discussion is a semantical nightmare and, historically, the term has been used differently at different times. The truck simply applies brakes to a spinning wheel, but the terms describing this get confusing.

As far as this thread is concerned, the 4runner can do 4 things: 1. Apply brakes to a spinning wheel (usually referred to as ATRAC) 2. de-throttle the engine. 3. beep 4. light up the dash. The rollback prevention called Hill Start Assist, which uses these things, may be involved too.

Assuming that you never heard actual gears grinding, the explanation is simple.

In high range without the center locked (standard mode), the brakes can pulse (grinding noise), the engine can de-throttle and make the truck go nowhere, and you get beeps and dash lights. Go to low range or lock the center diff and the de-throttling, beeps, and lights (VSC) are out of the picture. The pulsing of the brakes (ATRAC) can still happen to limit wheel slip if needed (grinding noise).

It does, though, sound like VSC may be overly sensitive. Hopefully the dealer will be able to tell.

 

[Throwing Matches]

I'll watch my mouth tell me when you look at my avatar you don't laugh.

I have to admit, I LOLd when I read your screen name. It's quite awesome.

 

[Youknowitdadio]

Ignore the acronym discussion. ATRAC (and VSC) discussion is a semantical nightmare and, historically, the term has been used differently at different times. The truck simply applies brakes to a spinning wheel, but the terms describing this get confusing.

As far as this thread is concerned, the 4runner can do 4 things: 1. Apply brakes to a spinning wheel (usually referred to as ATRAC) 2. de-throttle the engine. 3. beep 4. light up the dash. The rollback prevention called Hill Start Assist, which uses these things, may be involved too.

Assuming that you never heard actual gears grinding, the explanation is simple.

In high range without the center locked (standard mode), the brakes can pulse (grinding noise), the engine can de-throttle and make the truck go nowhere, and you get beeps and dash lights. Go to low range or lock the center diff and the de-throttling, beeps, and lights (VSC) are out of the picture. The pulsing of the brakes (ATRAC) can still happen to limit wheel slip if needed (grinding noise).

It does, though, sound like VSC may be overly sensitive. Hopefully the dealer will be able to tell.

You are right on the money.

 

[klennop]

You are right on the money.

So.....you took it to the dealer and did they tell you it was normal?

 

[gm350reratliff]

If I heard actual "grinding" like a manual transmission not going into gear, I would drain the trans/x-fer case oil and look for metal. If something is slipping/grinding there will be metal/material in the oil.

However, I do see that the sound described to us could be VSC/ATRAC/DAC or whatever you want to call it.

Not to get off topic, again, but the posts from prepareyouranus, V8 Brah, and eskimochaos sure sound the same (and they are all banned). Is this the same guy?

 

[chaz]

yea, thats what i was referring to before, they do all sound & seem very similar!