Transfer and differential Oil change

[1000MPH]

I'm looking to change the T-case and diff oils. I was told that I'd need to change the gaskets. When I put those part numbers into toyota parts website, the T-case gasket says it doesn't fit the 5th gen, and the drain plug gasket for the diff is no longer available for purchase. I'm stuck here.

From another post:
"Differential Fluid Change
GASKET, DRAIN PLUG - ALUMINUM DIFF (REAR:2 FRONT: 1) 1215710010
GASKET, FRONT DIFFERENTIAL DRAIN PLUG.* (QTY:1) 9043024003

Transfer Case Service
TRANSFERCASE GASKET DRAIN/FILL (QTY:2) 9043018008
Superseded by: 90430-A0003"

I agree that the T/C Drain/Fill gasket (9043018008 or 90430-A0003) puts you into a loop of unavailable/superceeded hell but it's still the correct one.
See the reviews on Amazon as well...https://www.amazon.com/gp/product/B017V4BAXI/


The front Diff Drain Plug is still on the Toyota website and fits 4R 2008-2018
https://parts.toyota.com/p/Toyota__Tacoma/GASKET/62986560/9043024003.html

 

[Gyprat]

Also note that I changed my rear differential lube at 20k miles and again at 50k miles, it was fairly dark colored and had some shavings on the magnet at 20k. But at the 50k change it was still pretty clean and almost no shavings. I used Amsoil Sever Gear 75w90 gear oil.

I have noticed the same results with Amsoil. After switching from Mobil 1 to Amsoil Severe Gear 75W-90, the amount of shavings on the magnet was nearly zero. Similar results were when I switched to Amsoil in my other vehicles. I have decided to buy all of the lubricants from Amsoil. It makes a very noticeable difference. Great oil!

 

[pDubs]

I'm looking to change the T-case and diff oils. I was told that I'd need to change the gaskets. When I put those part numbers into toyota parts website, the T-case gasket says it doesn't fit the 5th gen, and the drain plug gasket for the diff is no longer available for purchase. I'm stuck here.

From another post:
"Differential Fluid Change
GASKET, DRAIN PLUG - ALUMINUM DIFF (REAR:2 FRONT: 1) 1215710010
GASKET, FRONT DIFFERENTIAL DRAIN PLUG.* (QTY:1) 9043024003

Transfer Case Service
TRANSFERCASE GASKET DRAIN/FILL (QTY:2) 9043018008
Superseded by: 90430-A0003"

Just order this and it has every gasket to do front and rear diff +t-case

https://www.ebay.com/itm/GENUINE-OE...e=STRK:MEBIDX:IT&_trksid=p2060353.m2749.l2649


edit: hmm looks like the one on Amazon is only $8.50, posted above!

 

[Swipter]

https://www.amazon.com/gp/aw/d/B07CJHTDVV?psc=1&ref=yo_pop_mb_pd_title

I bought this on Amazon. Hope its correct because I just ordered the amsoil severe gear to finish off what I need. Now I can do both, I think.

 

[SilverTEP]

Just order this and it has every gasket to do front and rear diff +t-case

https://www.ebay.com/itm/GENUINE-OE...e=STRK:MEBIDX:IT&_trksid=p2060353.m2749.l2649


edit: hmm looks like the one on Amazon is only $8.50, posted above!

I ended up just going with the numbers given on this board not caring what toyota said about the fittement. I picked them up from my nearest dealer, and double checked with the parts guy to make sure. Once I took off the bolts it was exactly the same. Looking from that image, it's exactly what I got.

 

[SilverTEP]

https://www.amazon.com/gp/aw/d/B07CJHTDVV?psc=1&ref=yo_pop_mb_pd_title

I bought this on Amazon. Hope its correct because I just ordered the amsoil severe gear to finish off what I need. Now I can do both, I think.

Nice, that kit would get you 2 changes. I went with Redline 75w-85 synthetic. Way more expensive, $15/q vs the $32/g for 75w-90 Mobile 1. And went with Toyota's T-case oil, at a ridiculous price of $50 per liter.

I was at 44k miles, and I'd say the oil that came out of my t-case looked exactly as the oil I put in. But I guess I'm safe to leave it alone for next 40-45k miles.

The back diff was super black, the magnet was all gunked up, def cleaned up the metal shavings. Looks like the rear diff needs changes more often since it works full time.

 

[MTN4RNR]

Nice, that kit would get you 2 changes. I went with Redline 75w-85 synthetic. Way more expensive, $15/q vs the $32/g for 75w-90 Mobile 1. And went with Toyota's T-case oil, at a ridiculous price of $50 per liter.

I was at 44k miles, and I'd say the oil that came out of my t-case looked exactly as the oil I put in. But I guess I'm safe to leave it alone for next 40-45k miles.

The back diff was super black, the magnet was all gunked up, def cleaned up the metal shavings. I'm thinking rare diff needs changes more often since it pretty much works full time. I'm thinking that every 15k changes for the rare diff are in order.

I have had Redline 75w-90 in all three for the last 25k. Well, the front diff had the needle bearing TSB 10k ago, so it's fresher. I went ahead and purchased the Toyota 75w (even though according to specs that I read later, Redline 75w-85 satisfies requirements of SAE 75w) and will replace both diffs with 75w-85 Redline at 60k, along with the T-case with the OEM gold. No change in driveline feel or shifting ability with the T-case since I switched at 31k. Who knows, I may just swap Redline into all of them and sell the OEM :eyebrows: Jury is still out on the OEM versus aftermarket T-case gear oil, IMO.

 

[Swipter]

I got the ravenol 75 for my transfer case. Claims to meet requirements.

 

[SilverTEP]

I have had Redline 75w-90 in all three for the last 25k. Well, the front diff had the needle bearing TSB 10k ago, so it's fresher. I went ahead and purchased the Toyota 75w (even though according to specs that I read later, Redline 75w-85 satisfies requirements of SAE 75w) and will replace both diffs with 75w-85 Redline at 60k, along with the T-case with the OEM gold. No change in driveline feel or shifting ability with the T-case since I switched at 31k. Who knows, I may just swap Redline into all of them and sell the OEM :eyebrows: Jury is still out on the OEM versus aftermarket T-case gear oil, IMO.

Someone on this forum, or Tacoma, sent the Toyota 'Liquid Gold' T-case fluid for chemical analysis and it came out much better than anything on the market, as far as additives, metals, cleaners. Although not 3-4 times better as the price would suggest.

 

[MTN4RNR]

Someone on this forum, or Tacoma, sent the Toyota 'Liquid Gold' T-case fluid for chemical analysis and it came out much better than anything on the market, as far as additives, metals, cleaners. Although not 3-4 times better as the price would suggest.

Yeah I have seen that before. How those additives, cleaners, etc affect the longevity of the TC, no one knows. The fact that dealers don't stock it, some dealers knowingly use 75w-85/90, and the fact that if you google search either FJ Cruiser or 4Runner transfer case failure, you come up with nothing related to improper fluid being the cause, leads me to believe that this is one of the longest winded internet mysteries of our 10mm wielding times.

Since I bought the OEM, I will use it. But afterwards, I will happily run the Redline 75W-85, which meets SAE 75W specs.

 

[Aquabear]

I'm going to use Amsoil 75w90 Severe Gear this week to do the rear diff and maybe the front diff and T-Case.

I used Mobil one the last 2 changes but I'm ok paying more for a few more miles and AMsoil Severe Gear in the past has been great on my other 4R and Jeep.
I honestly don't think you can go wrong unsing these or the Red Line stated above.

 

[Swipter]

Here is my dumb move of the month. Good thing the month was almost over. I thought I would make it out clear free.

I used the flat aluminium transfer case washer on the rear drain plug. No leaks. I did use 36 ft pounds. Should be okay? It's an easy fix but I dont want to go through the mess.

 

[Swipter]

I'm going to use Amsoil 75w90 Severe Gear this week to do the rear diff and maybe the front diff and T-Case.

I used Mobil one the last 2 changes but I'm ok paying more for a few more miles and AMsoil Severe Gear in the past has been great on my other 4R and Jeep.
I honestly don't think you can go wrong unsing these or the Red Line stated above.

The squeeze bags were easy to use.

 

[MidwestJ]

Amsoil severe gear

I've used the squeezy bags of the Amsoil severe gear on my Ram and endorse their use.

Will be doing the wife's 4 Runner with the same.

After reading the gear oil study (admittedly paid for and published) by Amsoil-I'm sold on their formula.

 

[YelloLab]

This is a study of automotive gear lubes. This may be of interest to some.

AUTOMOTIVE GEAR LUBE COMPARISON

 

[702_SR5]

Hi, I just got a 2018 SR5. Could someone please tell me the size tools needed for the drain and fill hole plugs on both diff's and the xfr case? :thanks:

 

[MTN4RNR]

Hi, I just got a 2018 SR5. Could someone please tell me the size tools needed for the drain and fill hole plugs on both diff's and the xfr case? :thanks:

24mm socket for the rear axle and transfer case. 10mm hex for the front axle.

If you just got the vehicle, I would recommend that you leave the transfer case fluid in and not replace it. It's very expensive to replace with the OEM fluid, and honestly isn't worth replacing until at least 60k. I dropped mine at 30k and wish I hadn't. It looked brand new. But I know that everyone has their own protocol with vehicle maintenance. That's just my $.02

 

[1000MPH]

Hi, I just got a 2018 SR5. Could someone please tell me the size tools needed for the drain and fill hole plugs on both diff's and the xfr case? :thanks:

This is the "other" thread.
http://www.toyota-4runner.org/5th-gen-t4rs/117482-front-rear-diff-fluid-change.html

24mm socket for the rear axle and transfer case. 10mm hex for the front axle.

If you just got the vehicle, I would recommend that you leave the transfer case fluid in and not replace it. It's very expensive to replace with the OEM fluid, and honestly isn't worth replacing until at least 60k. I dropped mine at 30k and wish I hadn't. It looked brand new. But I know that everyone has their own protocol with vehicle maintenance. That's just my $.02

I would agree with this recommendation.

also... a 15/16" socket will work perfectly in place of a 24mm. Highly recommend a 6 pt socket.

 

[702_SR5]

Thanks for the info. I don't have any 24 mm sockets, so that will go on my shopping list!

I won't be changing fluids for awhile, but I do like to check those levels ocassionally, so I might as well get prepared now.

 

[Crusifix]

I just changed my fluids for the first time at 80K miles. Fluids seemed relatively good and slick still compared to some vehicles I have changed fluids on. I went with Amsoil 75w/90.