GSGALLANT

Well, as part of the transmission flush I'm planning on doing on my 2002 4R, I'm planning on dropping the pan, removing/cleaning the filter screen, then re-installing the screen with 5 new gaskets. Problem is, I went to the local Toyo dealer to order the gaskets, and the parts guy says: "There are no gaskets between the filter screen and the valve body on the A340F transmission", to which I responded: "Yes there is - five of them to be exact. Can you check again please?" He tapped away on his computer for a few minutes and told me the same thing again.

So I pulled out my drawing from the A340F transmission FSM, and showed him the 5 gaskets in the picture. (See attached file) He pulled out his copy of the FSM, and sure enough he found them in there also, but no part numbers.

So my question is, for those of you that have removed the transmission filter screen to clean it in the A340F transmission, did you replace the gaskets between the valve body and the filter, or just re-use the old ones. If you used new ones, did you get OEM replacements and do you have part numbers for them? Thanks.

boss hog

those 5 gaskets are attached to the oil strainer, just clean strainer and reinstall.

GSGALLANT

The FSM says to: "install 5 new gaskets.", and although you're likely right that they can be re-used with no problems, if I can buy new ones, I'd like to replace them while I'm in there.

FattyCBR

Like BH said, it's nothing to worry about, you don't need to buy new ones.

boss hog

if you want the new gasket just buy a new strainer, it comes with the gasket all ready attached. it will be about 50.00 dollars at the dealer.

MTL_4runner

Ditto (but might be more $$$$ up here).....and they are not usually in stock so order early. The gaskets are not available seperately so if you're worried, you need to buy the whole filter. I have pulled the filter, cleaned and reinstalled several times with no issues and no gasket replacement. Just be sure to reseat the filter properly and snug the bolts before putting the pan back on.

You can see the bolts in this pic:


There can be issues if the gaskets are not seated or are not there at all (as Gadget mentions):
http://www.gadgetonline.com/TransFlu...0pan%20gasket:

I have not had any issues with just pulling and cleaning the filter, but if your gaskets are damaged or missing (you only need to worry about the 3 cork gaskets for the inlets, the other 2 are just simple spacer grommets) when you pull the filter, you'd be best off replacing the filter (the gaskets have never stuck or become damaged during the several times I have done mine).

GSGALLANT

Thanks for the replies, guys. Looks like I'll be re-using the old gaskets when I do mine also.

What does the other side (top) of the filter assembly look like? I assume it's just the metal casing with holes where the gaskets go? Reason I ask is from the picture above, it doesn't look very easy to do a good inspection/cleaning of the screen. To clean it, do you just spray a cleaner (like brake cleaner) as best as you can through the filter inlet port, then blow some air through the filter outlet ports (where the gaskets go)?

FattyCBR

The other side is fine metal mesh, which is the filter. To clean it well you remove it from the tranny and then spray it off from the top side to flush it.

GSGALLANT

Are you sure? I don't mean to doubt you, but I just want to make sure I know as much as I can before I start the job.

I figured it would look like the picture attached below. I know the picture isn't the filter for an A340F transmission, but I figured that the design would be similar (I couldn't find a picture of the top side of the A340F filter).

If it's not designed like the attached picture, it wouldn't make sense to have the small gaskets in there at all. If the whole screen was exposed on the top side of the filter, then you would have a large gasket around the whole circumference of the filter, wouldn't you?

GSGALLANT

Bump... I'm sure somebody knows for sure...

MTL_4runner

No, you are right, there are just those 3 holes in the top (the top surface of the filter is not at all exposed except via the inlet holes where the cork gaskets are). The debris gets trapped on the top side of the filter so when you spray the brake cleaner (or other solvent) into the filter, you do so by spraying it into the oval hole (shown in the filter pic above) first to hopefully dislodge any large pieces via reverse flow on the filter. You hold the filter at a slight angle and use an oil drain pan to catch all the crap coming out of the filter inlet holes (you may need to spray and slosh the brake cleaner around at the same time.....take some technique). Then you can try to turn it over and spray into the inlet holes on top and see if you can get any more debris out of the filter. The filter in the end does not have to be perfectly clean but you are trying to get all the fine debris out which clogs the screen (much more than coarse debris does). Make sure the filter is completely dry of brake cleaner before you reinstall it.

GSGALLANT

Thanks a lot, MTL_4runner. That's exactly the info I needed.