Rear Differential & Transfer Case DIY
Thread Starter
CL Community Team
Joined: Apr 2004
Posts: 17,338
Likes: 213
From: Miami, Florida
Now I had to hold the bucket this time, so I couldn't get the shot where it comes out like a waterfall, but you will notice here the fluid is lighter colored than that of the rear differential, and this is due to the addition of the lighter colored 75W140 BMW gear oil with that of the 75W90 Royal Purple gear fluid.
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Thread Starter
CL Community Team
Joined: Apr 2004
Posts: 17,338
Likes: 213
From: Miami, Florida
We did the same thing as the first time we did this and attached a hose to the filler plug. Here Rodrigo holds the bottle. Like the rear differential, .9 L goes in.
Last edited by Lexmex; Mar 2, 2008 at 04:50 PM.
Thread Starter
CL Community Team
Joined: Apr 2004
Posts: 17,338
Likes: 213
From: Miami, Florida
And the final shot of my uncle blowing the last of the fluid (notice dark colored hose) into the transfer case.
This will likely be the last time I do this with them as 99.9% likely I will be back in the U.S. at this time next year, mostly likely in the Tampa, Florida area. Anyone who wants to help out next time is free to join me and we can do the same if you have an AWD RX.
This will likely be the last time I do this with them as 99.9% likely I will be back in the U.S. at this time next year, mostly likely in the Tampa, Florida area. Anyone who wants to help out next time is free to join me and we can do the same if you have an AWD RX.
Driver School Candidate
Joined: Feb 2008
Posts: 18
Likes: 0
From: British Columbia
For those of us handy to a Harbor Freight shop...they have a $4.99 suction pump which works great to suction fluids out...but also out of a container of diff fluid and then push it into the fill hole...did it last week and it works great.
I used it to suction brake fluid out of the reservoir before bleeding the brakes and then ...cleaned it out...used it to fill the tranny and diff. (not on an RX... but it will work.
I used it to suction brake fluid out of the reservoir before bleeding the brakes and then ...cleaned it out...used it to fill the tranny and diff. (not on an RX... but it will work.
Lexus Champion
Joined: Nov 2005
Posts: 2,110
Likes: 77
From: OH
Thanks for the great how too's! 
Most of the jobs I have done now have been written up with tons of pics. Makes it a much easier job, almost like you have done it before.
I used the harbor freight suction gun too. I think I will open it up to load it next time though. I was getting a lot of air in it since the gear oil is so thick. I ended up "using" a little more than a quart to do the transfer case since like any other job, I had to leave a decent puddle on the ground.
Most of the jobs I have done now have been written up with tons of pics. Makes it a much easier job, almost like you have done it before.
I used the harbor freight suction gun too. I think I will open it up to load it next time though. I was getting a lot of air in it since the gear oil is so thick. I ended up "using" a little more than a quart to do the transfer case since like any other job, I had to leave a decent puddle on the ground.
Driver
Joined: May 2004
Posts: 188
Likes: 0
From: California
And the final shot of my uncle blowing the last of the fluid (notice dark colored hose) into the transfer case.
This will likely be the last time I do this with them as 99.9% likely I will be back in the U.S. at this time next year, mostly likely in the Tampa, Florida area. Anyone who wants to help out next time is free to join me and we can do the same if you have an AWD RX.
This will likely be the last time I do this with them as 99.9% likely I will be back in the U.S. at this time next year, mostly likely in the Tampa, Florida area. Anyone who wants to help out next time is free to join me and we can do the same if you have an AWD RX.
Thread Starter
CL Community Team
Joined: Apr 2004
Posts: 17,338
Likes: 213
From: Miami, Florida
The suction gun concept is the better one. Another possibility is taking the suction piece of say those little bottles of fluid (like armor all, liquid for washing windows) and stick it on the bottle of the gear fluid. I do that for changing out the Power Steering fluid.