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How to Check Rear Differential Fluid 98-05 Lexus GS300

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How to Check Rear Differential Fluid 98-05 Lexus GS300

Created on: 2019-08-29

In this how-to video, our experts show how to check the rear differential fluid's condition and its fluid level

  1. step 1 :Checking the Rear Differential Fluid Level
    • Raise and support the vehicle if necessary, and make sure it is level
    • Have a piece of cloth
    • Remove the differential fill plug using a 10mm Allen head socket and ratchet
    • Let fluid drip onto the cloth
    • Inspect the differential fill plug for wear and metal deposits
    • Inspect the fluid for murkiness
    • Measure the level with a pinky and check if it is at the base of the fill hole
    • If the fluid level is low, add fluid as necessary

Tools needed for replacement

  • Materials, Fluids, and Supplies

    Gear Oil

Installation Video
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Hey friends, it's Len here at 1A Auto. Today, we're working on our 2001 Lexus GS 300 and I'm going to show you how to check your rear differential fluid. It's going to be super easy. I can do it, you can do it too. As always, if you need any parts, you can always check us out Thanks.

We're going to go right up to the check plug here and we're going to remove this. To do that, I'm going to use an Allen head socket, and this is a 10 millimeter Allen head. I'm just going to put it up in here. I'm going to turn it counterclockwise. So, I'll get out of there. Fluid may come out of this, so you want to make sure that you have your safety glasses on, your hand protection of course, and something to catch any fluid that might come out.

So, it's definitely full. Just going to put that there for one second. All right. So, I grabbed a little rag, nice and clean on the end here. I'm just going to try to drip a little bit onto this so I can see exactly what the fluid looks like. There we are. So, there's our fluid. It looks nice and clean. So, your fluid looks good in this. And of course, it's full because when I opened up the fuel plug, a little bit of fluid came out. It didn't really come roaring out or anything, so I'm not thinking that it's overly full, and it's also not super low where I pull the plug and nothing came out.

I stuck my finger with my pinkie. Usually, you stick your pinky in and you go down, and sometimes you get all the way down this far and you can't even feel any fluid. So, that's kind of what I was expecting where we've got a little bit of a fluid leak here, but it looks like the fluid level's looking good. So, I'm just going to go ahead and close this up and use the same tool I used to remove it, of course. Probably don't need to say that, but say it anyway. Let's get it in there. It's bottomed out. Just give it a little bit more and then that's it. We'll clean it up, not that it's going to help it out too much here, but we made a little mess. So, let's just pick up the mess we made. There we are.

And that's how you check your differential fluid. Easy peasy.

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Tools needed for replacement:

    Materials, Fluids, and Supplies

  • Gear Oil

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