Differential & Transfer Case gaskets

[cangler]

I'm thinking about changing out my diff and t-case oils, and wanted to clarify on the gaskets I will need to replace the old ones. I was about to place a order, and just want to be sure these are the correct quantities of these part numbers. I kept reading x2 next to these part numbers and I was getting a little confused.

Transfer Case Drain Plug Gasket -- 90430-18008
Transfer Case Fill Plug Gasket -- 90430-18008

Rear Differential Drain Plug Gasket -- 12157-10010
Rear Differential Fill Plug Gasket -- 12157-10010

Front Differential Fill Plug Gasket -- 90430-24003
Front Differential Drain Plug Gasket -- 12157-10010

 

[Burt]

Soory, but I am unable to answer your question. I was just curious as to why you are replacing these gaskets? To replace fluids on a 2008 is this required?

 

[jimithing]

Check page 3

http://www.toyota-4runner.org/maint...ntial-transfer-case-fluids-pics-included.html

 

[cangler]

Soory, but I am unable to answer your question. I was just curious as to why you are replacing these gaskets? To replace fluids on a 2008 is this required?

I read the gaskets are non-reusable parts, so I guess toyota recommends you replace them, does it really matter? Probably not... but I guess it's more ease of mind thing. I have less than 67k miles on my 2008 at the moment, does the diff and t-case gear oils NEED to be replaced? I doubt it... especially since its never been off-road, but I think the factory gear oils are in there and would like to try synthetic to see if it makes the ride any smoother, or increases mpg (long shot I'm sure).

Check page 3

http://www.toyota-4runner.org/maint...ntial-transfer-case-fluids-pics-included.html

Yeah I saw that and according to that particular page... I am correct with my numbers but I kept getting confused when I saw x2 by each part number (somewhere).
I just wanted confirmation that I was correct before I placed the order. So... by photo reference, I should have these gaskets I THINK.

 

[Synister]

I'm not completely sure about the exact part numbers but the quantities look good. Both the rears and front drain are the same part from what I remember and I definitely remember the front fill is a much different larger copper washer. The center were both the same but different from the rest, more of a washer than a gasket. While all 6 gaskets are listed as non-reusable, only the front drain and both rear gaskets are the crush type gaskets. The rest are basically washers, cheap to replace so why not? Good luck with the drain/fill, this was by far the most unpleasant mx I've ever done on a vehicle, gear oil is nasty stuff!!!

 

[cangler]

Good luck with the drain/fill, this was by far the most unpleasant mx I've ever done on a vehicle, gear oil is nasty stuff!!!

Come on, you're discouraging me :lol: I will try not to spill the old oil or get it on myself.... or is that nearly impossible? :lmao:

 

[jimithing]

Come on, you're discouraging me :lol: I will try not to spill the old oil or get it on myself.... or is that nearly impossible? :lmao:

You'll get some of it on you, it's pretty impossible not to. Really, though, it's not that bad. I mean it spells like gear oil and it's stronger than motor oil but it washes off after a couple of showers.

The worst part is the front drain plug. Mine was really in there and I ended up just pumping as much as I could through the fill plug. I'd say I got about 2/3 of it out.

Also, on the rear plug use a 15/16 6 point socket instead of a 24mm 12 point. I stripped mine using the 24mm 12 point and had to go buy a new plug. I was able to get the old one off with some channel locks but it shouldn't have been as hard as I made it.

Of course make sure you remove the fill plugs before the drain plugs so you're sure you can get refilled after draining.

 

[cangler]

Yeah I was contemplating if I should go with the 15/16" 6 point, or 24mm 6 point (found one online), either way... 6 point should be "better" than a 12 point right?

You think I should hit all the bolts with PB blaster spray before I begin to take any out?

Dully noted on removing the fill plugs first, read that a few times.

 

[jimithing]

Yeah I was contemplating if I should go with the 15/16" 6 point, or 24mm 6 point (found one online), either way... 6 point should be "better" than a 12 point right?

You think I should hit all the bolts with PB blaster spray before I begin to take any out?

Dully noted on removing the fill plugs first, read that a few times.

The 6 point just locks better and there's less chance of it stripping. I got mine at Northern Tool up here in Plano on 75. I hit mine with PB blaster before starting and I'm not sure it did any good. I let it sit an hour or so. Also, you're going to have to take off the skid plate in the front when you change the front diff fluid - my screws were rusted so I bought some new ones. Not a guarantee you'll have to just preparing you for the possibility.

 

[MikeInNH]

Both the transfer case and differentials have drain plugs. All you have to do is drain and refill. There is no need in dropping the pan/plate to replace the fluids.

Synthetic for improving gas mileage....No...I knew a guy that replaced all his fluids with synthetic...after one year a meticulously record keeping he was averaging about 10 miles more per tank. Sorry..but there may be an increase in mpg..but it's going to very very very insignificant.

As for smoother ride....you'll never be able to notice any difference.

Longevity...maybe..probably not worth it.

 

[mcyjph1]

Anyone find a good price on these gaskets? Just paid about $5.50 each at my local dealer.

 

[jimithing]

Anyone find a good price on these gaskets? Just paid about $5.50 each at my local dealer.

Each? That's absurd. Looks like they're around $1 each on the Toyota of Dallas parts website.

ToyotaPartSales.com

Or you can check Partznet

Conicelli Parts Center

Probably about the same prices from those two places.

 

[aha2988]

I've replaced my case fluids several times and continue to reuse the crush washers (there not really called gaskets). There metal and crush seal into place only time they would need replacing is if one cracked or was over tightened.

 

[MikeInNH]

I've replaced my case fluids several times and continue to reuse the crush washers (there not really called gaskets).

The crushed washer has been used by many companies over the years. My wifes Accords had them for the oil pan bolt. It was recommended by Honda to replace the washer every oil change. Over the 250k+ miles for each of those vehicles I NEVER replaced the washer. I'll bet it's the same with here.