waqas300

I have 98 LS400, after how many miles transmission oil needs to be replaced? Do i need to replace gear oil filter aswell on the oil change or there is some other miles for replacing the filter?

sha4000

iTrader: (1)

If you don't know when it was changed last I would say start some drain & fills immediately? You have to drop the tranny pan to check the filter.

waqas300

According to the general maintenance? How much miles after putting in a fresh oil?

sha4000

iTrader: (1)

There's no specific schedule to replace it but your supposed to check it's condition every 12 months. I see lots of ppl suggest to d a drain & refill every 30k but that's personal preference.

paulo57509

According to the maintenance schedule booklet that came with my '98, the transmission fluid should be drained and replaced every 15,000 miles under "severe" service. No fluid replacement is specified under "normal" service. Frankly, I would never follow "normal" service maintenance intervals for any vehicle.

There's no mention of a service interval for filter replacement. I had a Lexus parts department tell me that they don't even keep the filter in stock when I asked about buying one. He said the service department just hooks up the machine and does a fluid exchange. If you want to replace the filter (it's actually just a fine screen) I would do it every other drain and refill.

If you don't know if fluid maintenance has been kept up, you can do several drain and refills with a short interval in between (dilution method). Eventually, you'll end up with mostly fresh fluid but it'll take a while. Assuming 8.9 quarts total capacity and 2 quarts every drain and refill (I can get 3 quarts out if I let it sit for a while) it'll take around 7 drain and refills to get 80% "fresh" fluid.

If you don't care to be crawling under the car every month for the rest of the year, I think it would be money and time well spent to just have a fluid exchange done with the proper fluid and then just follow the maintenance schedule.

RA40

iTrader: (6)

What color is the fluid currently?

dicer

And be careful there is no gear oil in an automatic transmission. Special Toyota fluid only. Unless you want to do a costly experiment and re engineer what the Lexus engineers already did.

waqas300

Isn't this the one?

waqas300

It's red recently done the change.

PureDrifter

iTrader: (10)

That is the correct fluid.

I believe it is a regular drain and fill ever 30,000 miles.

Bill Dowd

My 1991 ls400 has 325,000 miles I change the oil at 30k pumping it out thru a trans cooler, I drop the pan every 60 ,000 to check for metal and dirt in the pan. I use mobile one and Max Life synthetic trans fluid so far no problems you can also use the Toyota type 4 but changing the trans fluid and power steering fluid makes all the difference in the world. You can also drain the trans thru the drain on the bottom of the trans pan I got 529,000 on a 86 Toyota Cressida trans and PS and motor by just changing the oil. Type 4 or synthetic will go the same distance if you change the oil the reason for the trans cooler it will help the trans to last longer.