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Drive Train Greasing?

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Old Jun 17, 2025 | 08:40 PM
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Default Drive Train Greasing?

Question - Is there any need to grease the drivetrain on a awd RX350?

Background - I have been going through all the maintenance on my daughter's GX460, and one item I still need to address is greasing the drivetrain. There are videos showing how to do this on a GX.

This past weekend, I did a brake job on the rear brakes of our 21 RX. During the process, I saw a zerk (edit: it was probably the blender for brake fluid) but I can't find anything in the manual about grease requirements or zerks. The GX manual outlines the type of grease needed for that vehicle. I can usually find answers to these questions online, but this was I've come up blank. Does an RX have any grease requirement for the drivetrain?



Last edited by UTGS400; Jun 18, 2025 at 10:54 AM.
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Old Jun 18, 2025 | 06:05 AM
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Originally Posted by UTGS400
Question - Is there any need to grease the drivetrain on a awd RX350?

Background - I have been going through all the maintenance on my daughter's GX460, and one item I still need to address is greasing the drivetrain. There are videos showing how to do this on a GX.

This past weekend, I did a brake job on the rear brakes of our 21 RX. During the process, I saw a zerk but I can't find anything in the manual about grease requirements or zerks. The GX manual outlines the type of grease needed for that vehicle. I can usually find answers to these questions online, but this was I've come up blank.
Where exactly did you see the zerk?
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Old Jun 18, 2025 | 06:52 AM
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I haven't seen a zerk fitting on a car in years!
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Old Jun 18, 2025 | 07:30 AM
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Originally Posted by autotech13
Where exactly did you see the zerk?
It’s on the caliper (see photo…it has a rubber cap on it). It made me wonder if there was a need to grease the drivetrain like you are supposed to do on GX’s.


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Old Jun 18, 2025 | 07:55 AM
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Originally Posted by UTGS400
It’s on the caliper (see photo…it has a rubber cap on it). It made me wonder if there was a need to grease the drivetrain like you are supposed to do on GX’s.
I don't know, but could that be for brake fluid?
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Old Jun 18, 2025 | 08:20 AM
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Originally Posted by ravenuer
I don't know, but could that be for brake fluid?
You are probably right. I wasn’t looking to put grease in that…i never even removed the cap. I was just curious if anybody knew if there was a need to grease anything on an RX.
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Old Jun 18, 2025 | 10:17 AM
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>> I did a brake job on the rear brakes of our 21 RX.

What "brake job" was it? Did you bleed the brake? If you did, you should know what a bleeder valve looks like.

Last edited by pentaprism; Jun 18, 2025 at 10:20 AM.
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Old Jun 18, 2025 | 10:52 AM
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Originally Posted by pentaprism
>> I did a brake job on the rear brakes of our 21 RX.

What "brake job" was it? Did you bleed the brake? If you did, you should know what a bleeder valve looks like.
Pads and rotors. I’ve never changed or bled brake fluid.

But this doesn’t answer my original question regarding whether or not there is a need to grease anything on an RX.
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Old Jun 18, 2025 | 11:28 AM
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The only grease I actually put on would be the brake components. Otherwise, drivetrain, never.

And looks like you are new to this.. In the picture, that zerk is the bleeding valve for the brake fluid.

Last edited by GS4_Fiend; Jun 18, 2025 at 11:31 AM.
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Old Jun 18, 2025 | 02:21 PM
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Originally Posted by UTGS400
Pads and rotors. I’ve never changed or bled brake fluid.
Wow. Replacing pads and rotors without bleeding? Somehow I thought bleeding was always the last step of any brake job.

Originally Posted by UTGS400
But this doesn’t answer my original question regarding whether or not there is a need to grease anything on an RX.
Guity as charged. I was distracted by the "brake job."

No, there is no need to grease anything on an RX, or any of my current vehicles. The last time I used my grease gun was... let's me see... probably 30 years ago. Amazing, still have it in my garage....





Last edited by pentaprism; Jun 18, 2025 at 02:23 PM.
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Old Jun 18, 2025 | 03:04 PM
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Originally Posted by pentaprism
Wow. Replacing pads and rotors without bleeding? Somehow I thought bleeding was always the last step of any brake job.


Guity as charged. I was distracted by the "brake job."

No, there is no need to grease anything on an RX, or any of my current vehicles. The last time I used my grease gun was... let's me see... probably 30 years ago. Amazing, still have it in my garage....


I still got mine out in the garage too!
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Old Jun 18, 2025 | 05:16 PM
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Originally Posted by pentaprism
Wow. Replacing pads and rotors without bleeding? Somehow I thought bleeding was always the last step of any brake job.


Guity as charged. I was distracted by the "brake job."

No, there is no need to grease anything on an RX, or any of my current vehicles. The last time I used my grease gun was... let's me see... probably 30 years ago. Amazing, still have it in my garage....



I have a pneumatic one in my tool chest, but I think I will have to buy a manual one for the GX. The manual one I owned was thrown away after a blow out lol. I figured the cost was so low it would be easier to buy a new one rather than clean the blowout.

BTW, the TIS documents didn’t require bleeding brakes on all my other Lexus vehicles and all the online steps for the RX matched the other vehicles (no bleeding required). The RX was different since there is a procedure you have to follow to back out the auto parking brake motor prior to compressing the pistons. Turning off the parking brake was not enough like it was in my LS (even though it also has an automatic parking brake).

I always check the fluid level before and after and it was fine on the RX.

Last edited by UTGS400; Jun 18, 2025 at 06:52 PM.
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Old Jun 18, 2025 | 05:31 PM
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Why would you buy a grease gun for your GX?
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Old Jun 18, 2025 | 05:38 PM
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Originally Posted by ravenuer
Why would you buy a grease gun for your GX?
Because GX 460’s have zerks on the drivetrain for adding grease. That’s what made me ask about the RX.
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Old Jun 18, 2025 | 06:59 PM
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Originally Posted by UTGS400
Because GX 460’s have zerks on the drivetrain for adding grease. That’s what made me ask about the RX.
I have a GX too. We just bought an RX for my wife. And was wondering if RX had a serviceable drivetrain…

I do recommend the lock-n-lube coupler for your grease gun. Easier to get on and off zerks.
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