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DIY: Transmission & Transfer Case Fluid Change

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Old 08-10-2016, 12:20 AM   #1
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DIY: Transmission & Transfer Case Fluid Change

I need to do Transmission and Transfer case fluid change.
can anyone post some pictures where they located?
i know i need to fill Transmission fluid from dip stick (yellow) but would be very helpful to see where drain bolts of Transmission & Transfer
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Old 08-10-2016, 04:16 AM   #2
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Transfer case drain and fill bolts:

DIY Transfer case drain/fill

Transmission drain bolt:

Transmission service

Last edited by rosen39; 08-10-2016 at 04:19 AM.
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Old 08-10-2016, 09:46 AM   #3
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Quote:
Originally Posted by rosen39 View Post
Transfer case drain and fill bolts:

DIY Transfer case drain/fill

Transmission drain bolt:

Transmission service
thanks. i saw Transfer case thread but not the transmission one.
I will post DIY since there isnt very clear instruction. easy but would help may peeps lol
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Old 08-10-2016, 11:52 AM   #4
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I used the transmission dipstick tube to refill the transmission. No need to get at the bolt on top of the transmission case. I did however remove the plastic air intake to make things easier.

Here is the funnel I used:

https://www.amazon.com/Hopkins-10704.../dp/B000EH4V0Y
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Old 08-10-2016, 12:58 PM   #5
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Quote:
Originally Posted by rosen39 View Post
I used the transmission dipstick tube to refill the transmission. No need to get at the bolt on top of the transmission case. I did however remove the plastic air intake to make things easier.

Here is the funnel I used:

https://www.amazon.com/Hopkins-10704.../dp/B000EH4V0Y
I got it. i think i have that funnel in my garage
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Old 08-13-2016, 10:24 PM   #6
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I just replaced both Transmission Fluid and Transfer case fluid.
i couldnt find funnel and had to buy another one. (cheap though)
it was too dark to take picture but if you see under, you cannot miss these drain & filler plugs. look for 3/8 socket hole!

I just drove to 4x1 wood so i could have little more space to crawl under and you can reach to transfer case no problem.
I bought Honda HGO-1 75w-85 oil because Acura didnt have that Transfer case fluid and they show me they use general gear oil.
so i bought only Acura ATF 4 quarts.

anyway i started with Transfer case fluid then it went very smoothly with pump i used (https://www.amazon.com/Plews-55001-L...nsmission+pump)
also Transmission Fluid was easy to drain as well
when i try to reach that dipstick with funnel, it's very tight space!!! that intake snorkel was very tight with rubber adapter but i managed to pry that off with flat screw driver.
then refilling fluid was easy

manual has 3.3 qts to fill so i bought 4 qts but when i checked how much i drained.
it drained about 4.2 qts!!!
I just filled 4 qts and finished since already too dark and Acura is closed to get another qt.
I will just buy 5 qts when i need to do next transmission fluid change.

few tip of doing this
1. you dont have to lift vehicle to change transmission fluid but you wont be able to reach transfer case so Drive up to 4x1 wood.
2. 3/8 short ratchet probably wont give enough leverage to break that plugs so breaker bar or use pipe with ratchet to break it
3. washers didnt look bad but i replaced them anway
4. Acura didnt have that Transfer Case fluid. so get it from Honda!! part# 08200-9014 and you need only 1 qt! and you can use it next time again
5. Get 5 qts of Transmission Fluid not just 4 qts!
6. Intake Snorkel is tight but you can pry that off with Flat Screw driver so dont worry about breaking it.

hope this helps!
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Old 09-04-2016, 06:51 PM   #7
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I am thinking of doing the same thing a bit early only to save time since later on I will be busy and right now I have the time. In reading your post I had a bit of a problem understanding some points. I understand that doing the automatic transmission is pretty easy. You can fill it using the standard fill tube after removing the panel in the engine compartment. But On the transfer case I looked under my 2016 and could easily see the 3/8 socket hole. But despite looking on the drivers side and passenger side underneath I was not able to figure out where the filler is for the transfer case. Ideally a picture and location would be great! Could you please provide some additional tips in doing the transfer case fluid change? I cant figure out where the fill plug is?
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Old 09-04-2016, 07:12 PM   #8
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See attached picture (the is of an MDX transfer case). The fill bolt looks like the drain bolt. The front should be on ramps, and then jack up the back to make the car level. You will need a pump to put on the one quart bottle to pump the fluid in. It will take 1/2 of the quart.
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DIY: Transmission & Transfer Case Fluid Change-transfer-assy_mdx.jpg  

Last edited by rosen39; 09-04-2016 at 07:14 PM. Reason: attachment
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Old 09-04-2016, 07:20 PM   #9
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On mine its very dark up in there. Its so hard to see anything even with a flash light. I will have another look. Thanks for the quick reply! You did a nice job of documenting the process.
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Old 09-04-2016, 07:39 PM   #10
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You may need a breaker bar to take off the plugs, but just be sure to remove the "fill" plug first. You would not want to drain and then be unable to re-fill. You should be able to see it from the front of the car.
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Old 09-05-2016, 12:02 AM   #11
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Ok, good idea, otherwise i might be stuck. So I am guessing you went under the front of the car to do the transfer case fill? And not the side? Also i am guessing that the clearance is small? Any further tips? Sure appreciate your sight here.
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Old 09-05-2016, 02:49 AM   #12
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Yes, go in from the front. Drive it up on ramps and you have all the room in the world to do the fluid changes. Just make sure you also jack up the rear to make the car level. My driveway is slanted, so I did not have to jack up the rear that much.
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Old 09-21-2016, 09:58 AM   #13
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At what mileage are you guys changing your transmission fluid?
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Old 09-21-2016, 10:36 AM   #14
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Originally Posted by davisinla View Post
At what mileage are you guys changing your transmission fluid?
my indication alert poped up at around 28,xxx so i am guessing it needs to changed every 30,000 mileage.
i usually change transmission fluid every 40K - 50K but i just changed
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Old 09-21-2016, 11:18 AM   #15
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Quote:
Originally Posted by inmydream316 View Post
my indication alert poped up at around 28,xxx so i am guessing it needs to changed every 30,000 mileage.
i usually change transmission fluid every 40K - 50K but i just changed
Thanks.
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Old 10-06-2016, 09:27 AM   #16
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RDX Transmission Filter - FILTER - ACURA (25430-PLR-003)

The 2nd Gen RDX has a listing for a transmission fluid filter, FILTER - ACURA (25430-PLR-003). Is replacing this part of the normal transmission fluid service, I didn't notice it in the maintenance requirements section of the owners manual.
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Old 10-06-2016, 09:36 AM   #17
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Originally Posted by Hud View Post
The 2nd Gen RDX has a listing for a transmission fluid filter, FILTER - ACURA (25430-PLR-003). Is replacing this part of the normal transmission fluid service, I didn't notice it in the maintenance requirements section of the owners manual.
hmm interesting...anybody??
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Old 10-06-2016, 10:47 AM   #18
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See attached link below:

25430-PLR-003 - Genuine Acura Filter (ATF)

The page says the part is guaranteed by the Acura Factory Warranty. The powertrain warranty is 6 years or 70,000 miles, so I'd say don't worry about it till then.
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Old 10-06-2016, 10:56 AM   #19
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Quote:
Originally Posted by rosen39 View Post
See attached link below:

25430-PLR-003 - Genuine Acura Filter (ATF)

The page says the part is guaranteed by the Acura Factory Warranty. The powertrain warranty is 6 years or 70,000 miles, so I'd say don't worry about it till then.

nice find. hopefully it's not difficult to change and easy access
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Old 10-06-2016, 11:16 AM   #20
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Looks easy enough to change and real short money. On my wife's 2006 Mercedes I asked the service writer when transmission fluid and filter get changed. He looked at me with a puzzled look on his face and said "only when there is a problem".
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Old 10-06-2016, 06:07 PM   #21
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RDX Transmission Filter

For about $25 and what appears to be about 15 minutes work, I would think changing the ATF filter would be wise at each ATF change/flush. Might be $25 down the drain but perhaps not.
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Old 10-07-2016, 09:32 AM   #22
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For about $25 and what appears to be about 15 minutes work, I would think changing the ATF filter would be wise at each ATF change/flush. Might be $25 down the drain but perhaps not.
post some DIY when you do
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Old 10-07-2016, 10:26 AM   #23
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Transmission ATF Filter

It will be 2 years until my RDX is due. I did see some pictures online but not from a newer RDX. The part is listed to fit by Acura, Amazon sells the Honda part (same part number), it's an inline filter so unless they buried it behind something it should be an easy change. Reading the Amazon comments the filter is in several different locations depending on the specific Honda model. Follow the transmission cooler lines and I'm sure you'll run into it, looks like it simply attaches with hose clamps.

Amazon Honda Part: https://www.amazon.com/Genuine-Honda...B00GI9NP0O#Ask
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Old 10-07-2016, 10:52 AM   #24
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Quote:
Originally Posted by Hud View Post
It will be 2 years until my RDX is due. I did see some pictures online but not from a newer RDX. The part is listed to fit by Acura, Amazon sells the Honda part (same part number), it's an inline filter so unless they buried it behind something it should be an easy change. Reading the Amazon comments the filter is in several different locations depending on the specific Honda model. Follow the transmission cooler lines and I'm sure you'll run into it, looks like it simply attaches with hose clamps.

Amazon Honda Part: https://www.amazon.com/Genuine-Honda...B00GI9NP0O#Ask
it will be easy if access is easy enough..hope it's not in very tight space i will share mine if change mine.
when do we need to change on? mileage?
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Old 10-07-2016, 11:09 AM   #25
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Transmission Filter

rosen39 said the part is covered under the drive-train warranty for 70K. I haven't found any Acura recommendation for changing the filter. These two 'facts' would lead me to believe this is a lifetime part that would only be replaced if it failed or perhaps after a rebuild.
If this is the case, it would be the only filter that I have ever encountered that is not considered to be a maintenance item. Since I believe filters eventually plug and become less efficient, for the $25 I plan to change mine every other AFT change, about 60K. Over the life of the car, probably about $50 wasted, but I'll sleep a little better.
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Old 10-07-2016, 11:12 AM   #26
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Quote:
Originally Posted by Hud View Post
rosen39 said the part is covered under the drive-train warranty for 70K. I haven't found any Acura recommendation for changing the filter. These two 'facts' would lead me to believe this is a lifetime part that would only be replaced if it failed or perhaps after a rebuild.
If this is the case, it would be the only filter that I have ever encountered that is not considered to be a maintenance item. Since I believe filters eventually plug and become less efficient, for the $25 I plan to change mine every other AFT change, about 60K. Over the life of the car, probably about $50 wasted, but I'll sleep a little better.
that's good idea...i probably gonna change when mine reaches about 90K because i am lazy.
i already did first ATF change at around 29K..

thanks for this info
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Old 02-22-2017, 01:38 PM   #27
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HGO vs HGO-II

My 15 MDX manual calls for HGO while the 16 RDX manual says HGO-II.
I assume there's a difference but I cannot seem to find what it is.

Does anyone know? I usually use Mobil-1 synthetic 75w90 in our 04. Hoping I can use it on the other 2 of our vehicles.
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Old 02-22-2017, 03:30 PM   #28
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Is this for the transfer case?
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Old 02-22-2017, 08:35 PM   #29
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Quote:
Originally Posted by rosen39 View Post
Is this for the transfer case?
Yes they appear to use two different gear oils.
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Old 02-22-2017, 09:31 PM   #30
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I bought the Acura HGO-1 gear oil for my 2013, and it has the same API GL-5 oil rating as the Mobil-1 75w-90. I have seen Honda HGO-III on the internet but this is probably nothing more than marketing change for the label.

I'll use the remaining 1/2 quart on the next change, but after that, I'd just get the Mobil-1 gear oil.
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