mathewd23

What about the front ? Since it is a AWD, 2000 Lexus RX300, dont i need 1 qt for front transfer case and 1 qt each for rear differential and rear transfer case ? Pls let me kow if that is right. Thks

carguy07

You need a quart of gear oil for the rear diff and a quart of gear oil for the transfer case. The front diff shares ATF fluid with the tranny, that's why you have two plugs to remove when you do the tranny fluid.

mathewd23

Carguy, you are great and u rock:, wow I had so much of confusion and was not sure as i had purchased 4 qts of Royal Purple 75W90 thinking I would need 2 for the front differential & Transfer case and 2 for Rear differential and Transfer Case, but with your response it was clear, I just did a rear differential oil change, i still need to do the front transfer case, but not able to get the right tool to open the filler bolt as there is no place to even place a 24mm box wrench. Do you know what is the best tool in that spot and what size i may need to use. I have a 2000 RX300 AWD with 102K miles on it. and of course the major problem is oil leak from rear main seal. just dragging along with it, as it is too expensive to repair the main seal.
Thankyou once again for the right direction.

carguy07

I just use a 1/2 socket wrench with maybe 10" in extentions to get to it. Use either 15/16" or 24mm for the socket (they are almost exactly the same size). The fill plug has a very thin head, so you need to push on it hard to keep the socket from jumping off. The drain plug can be tough too. There is not much room to get a wrench on it. I took someone's advice on here and got a 15/16 wrench from Ace Hardware it's their "Pro Series" to do the transfer case drain. It has a very thin walled box end and fit the plug with no grinding (worked on by brother-in law's RX330 too). https://www.clublexus.com/forums/5090318-post9.html

galtom

Can someone clear that up?
I got 2003 (1st gen) US RX300.
In regard on differential oil change I have been advised following:

Polish Lexus dealer: Oil SAE 80W90 changed every 30kkm (approx: 18.600 miles) - for both front and rear.

Lexus US at Facebook: The differential fluid should be inspected every 24 months and changed if dirty with Genuine Toyota T-IV Fluid.

Lexus NY dealer: 80-90 gear oil and you change it every 3 years or 30,000 miles which ever one comes first.

Other lexus forum): The front differential shares the tranny fluid...The front transfer case uses gear oil as well as the rear differential...

And you say about 2 different oils....

Rear differential is shown in the picture below, takes officially 85W90 gear fluid [...] This is the transfer case. Also uses 75W90 gear oil.

Can someone clear this up, please?

2KHarrier

Front Dif uses Trans fluid because it is tied into the transaxle. (change every 15-20K miles along with trans)

Transfer case uses gear oil and is located just aft of the front differential/transaxle. You can use 80w90, although many guys on this forum like the 75w90 Synthetic. (change every 25-30K miles)

Rear diff uses the same gear lube as the transfer case. 80w90 Dino or 75w90 Synthetic (change interval is the same as the Transfer case 25-30K miles)

The intervals are an average of what I've read other members on CL are doing. Synthetic can go on a longer interval, depending on driving conditions.

I changed my rear differential oil last month and it was last done at the dealership before I bought the car, about 25K miles ago. It looked new. I'll be doing the transfer case oil in the next couple weeks, and I'm assuming that it too, will look new still....

aftabf1

hey guys,

I have lexus rx300 and i am facing issues in trasnfer assembly, can anyone guide me to shall i look for used one and whether i can also install transfer assembly 2005 or not.


thank you

glenpointe

Do you know oil capacity for this transfer case?

Lexmex

Both the transfer case and rear differential each take .9L, basically just use own .946L/1 Quart bottle of 75W90 gear oil in each