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Hey guys, I know it's not a tundra question. However, you guys have been great help in the past. My wife has a 99 Sienna which she has just turned 30 K miles on. I changed the tranny fluid and went to change the diferrential fluid as well. I wanted to pull the fill plug first but could not find one. I have the Factory repair manual and it does not show one anywhere. Is the differential a common feed from the trans fluid? Is there a fill plug that I just can't find? Help


Dan
 

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dwagner825 said:


Hey guys, I know it's not a tundra question. However, you guys have been great help in the past. My wife has a 99 Sienna which she has just turned 30 K miles on. I changed the tranny fluid and went to change the diferrential fluid as well. I wanted to pull the fill plug first but could not find one. I have the Factory repair manual and it does not show one anywhere. Is the differential a common feed from the trans fluid? Is there a fill plug that I just can't find? Help


Dan


The DIFF is a common feed with the Transmission.
 

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Diff

RichR said:
I can't agree on that if it is the same as the Camry.Which I think it is built on that platform.
You need to ask Eddie.
RichR
WELL, I happen to be standing under a 1999 sienna.
#1 You can drain the diff from below
#2 You fill it from the transmission.
#3 There is no fill plug because it is a common feed
#4 Just Like the V-6 Camry
Take Care
Victor
 

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mustang67408 said:
WELL, I happen to be standing under a 1999 sienna.
#1 You can drain the diff from below
#2 You fill it from the transmission.
#3 There is no fill plug because it is a common feed
#4 Just Like the V-6 Camry
Take Care
Victor
Victor,
I have a '99 Camry that I drain the trans and then open the diff drain.
Once a year.
It sure comes out like its full after the trans has drained.
I drain it last so the trans has drip time.And usally fill independantly with a small squeeze bottle filled with atf.
It has a small block with two fill plugs facing the rear of the car.
RichR
 

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Discussion Starter #6
RichR said:
Victor,
I have a '99 Camry that I drain the trans and then open the diff drain.
Once a year.
It sure comes out like its full after the trans has drained.
I drain it last so the trans has drip time.And usally fill independantly with a small squeeze bottle filled with atf.
It has a small block with two fill plugs facing the rear of the car.
RichR
That was the same type set up on my previously owned corolla and camry. However, there is no fill plug. That's what perplexed me. Victor is a Toyota Master mechanic so I think he's the authority here. Not doubting him, but I checked with the tech at the local dealer over the phone. They said the same thing common feed from the trans.


Thanks to both though,

Dan
 

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fill plug

dwagner825 said:
That was the same type set up on my previously owned corolla and camry. However, there is no fill plug. That's what perplexed me. Victor is a Toyota Master mechanic so I think he's the authority here. Not doubting him, but I checked with the tech at the local dealer over the phone. They said the same thing common feed from the trans.


Thanks to both though,

Dan
YOUR WELCOME :tu:
 

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fill plug

RichR said:
Victor,
I have a '99 Camry that I drain the trans and then open the diff drain.
Once a year.
It sure comes out like its full after the trans has drained.
I drain it last so the trans has drip time.And usally fill independantly with a small squeeze bottle filled with atf.
It has a small block with two fill plugs facing the rear of the car.
RichR
Just curious, is your Camry a V-6? or 4cyl?
I have checked all the books , and can not find any fill plugs for a V-6 Diff.
for a 1999 camry. I am investigating futher, but i remember only 4 cyl having fill plugs,and independant sumps.
The early 1989 or so V-6's did have a independant sump and fill plug, but i dont remember a later model having it.
You have me curious, ill do more investigating as the day goes on.
Thanks for your time and patience
Victor
 

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Hi Victor,

mustang67408 said:
Just curious, is your Camry a V-6? or 4cyl?
I have checked all the books , and can not find any fill plugs for a V-6 Diff.
for a 1999 camry. I am investigating futher, but i remember only 4 cyl having fill plugs,and independant sumps.
The early 1989 or so V-6's did have a independant sump and fill plug, but i dont remember a later model having it.
You have me curious, ill do more investigating as the day goes on.
Thanks for your time and patience
Victor
It's a '99 v-6 original owner.I went to a Toyota dealer and bought two new fill hole plugs last year because the were getting a little rounded.The parts man looked them up in his book.They were exact matches to what was from factory.
As far as I can tell its a separate fill.
I am in no way a mechanic.I have TimTayloritis.
I'm a home oil changer thats about it.
I do regular fluid changes.Car has 61k so about four times.
These fill fittings are right above the drain hole towards the rear of the car.One points up,the other toward the driver side wheel.12mm head on them if I remember.
I found out about the diff in a newspaper car advice column"Motormouth".
Thanks for being civil.I thought this was gonna get ugly when it was posted you were a Toyota tech.
Now I have two Escorts in the family with what looks like a diff drain on the bottom.But I could never find the fill hole.Must be a better idea.
Take care
RichR
 

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Fill plug

Well, as it turns out WE ARE BOTH RIGHT.
The plug facing the drivers side wheel will fill the diff. I have never used it tho.
BUT! The Trans and the diff share a common fill, you dont need to remove that plug to fill the trans/diff assy. It has been that was since about 1994(approx year),when they went to the A541E. When both fill and drain plugs face the rear of the car, this is when they have seperate fill.( Usually 4 cylinder vehicle).or early v-6's A540 trans.
:ts:
Your welcome , we are both adults and can have a differance of opinion. Thats what makes this country so GREAT! I am always open to learning new things everyday.Talking and sharing imformation will make us both better people.

It nice to hear so many people in here that take the time to take care of their vehicles. I work on so many abused cars/trucks all day long it would make your head spin.

Feel free to ask me anything, I always try to give my honest opinion and answer.I dont mind digging for info, and am not afraid to admit when i am wrong. :eek:
Take care
Victor
 

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Re: Fill plug

Thank you all for this information. I had a used transmission put into my 2000 model V6 Toyota Sienna. A month later I had to put it back into the shop under warranty for what I was told was a bearing replacement in the differential. I too thought the differential was filled from the transmission. One year later I parked on a 10% grade hill with the front of the van pointing up the hill. When I returned I found a large, 5 foot long by one foot wide fluid leak under my van. The fluid was bright red and I assumed it was transmission fluid. However, when I parked the van on level ground and checked the transmission fluid level, it was were it was supposed to be on the dip stick. Adding to my confusion, I noticed it was a very light pink color, not bright red. My first thought was someone was playing a joke on me but now after reading the information presented on the forum here, I'm going to get the differential fluid level checked pronto.
 
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