Changing differential fluid - A step by step "HOW TO"

i am reading thru my tacoma manual...rear differential is 3.12qt and transfer case 1.1qt

just saw the manual... it says... 75w-85 recommends for toyota trucks... I notice you guys putting in 75-90, I guess that's ok?

 

hey Chris I did my diff fluid change and used 80-90 gear oil in my 2005 trd off road it says to use 75-90 is this a big issue using the 80-90 and it is non synthetic, the guy at the parts store says all 75-90 is synthetic now??? thank you for the great write up too.

 

You can buy 75-90 non-synthetic, but it's not that common anymore in auto parts store. Besides, if you are going to run 75-90, you might as well run synthetic. As far as I know, running 80-90 in a Tacoma rear diff is fine. I'm sure Chris will have more info when he chimes in.

 

^great thanks Chris

 

the manual says to run it at 80w-90, so does the haynes..

but I have

$29 75w-90 Synthetic Gear Lube - 1 Quart (Pack of 2)

75w-90? what's the difference?

 

I didn't know my name was Chris...

jackass.

 

I recently changed my diff oil to royal purple 75-90. all seems fine except for when I drive the truck after it has not moved for a couple days. At full lock, when turning at slow speed, I get a bit of chatter. After the initial chatter, it does not happen again. I thought it was just due to the oil settling and not lubricating the clutch plates well. I also notice that the tires chirp more when I turn from a stop. The royal purple was suppose to have the LSD additive already in it, but I am thinking about adding additional friction modifier. Would this be a good idea to add friciton modifier to a lsd oil that is suppose to have it already?

 

Thanks for the quick reply. I was not sure if the occasional chatter is normal or not. Is the chirping of the tires from a stop something that is directly associated with the diff fluid? It hasn't gotten any worse in the past 4k miles I have put on the truck so I am not sure if it was something to worry about. Would there be any problem switching from a synthetic diff fluid back to conventional gear oil?

 

I was wondering the same thing.. anyone use this?? Or better yet has anyone had success using a synthetic oil in the rear diff??

 

That should be fine, but I noticed you have a TRD sport, so I believe you will need a limited slip additive as well.

 

I own a 2007 DC LB TRD SPORT and have reached the 30000 mile interval . I would like to change the front, rear and transfer case diff. oil but it has gotten kind of confusing on what to use where!!! So let me get this straight-- 1-I can use synthetic

$29 75W-90 Synthetic Gear Lube - 1 Quart (Pack of 2)

75W-90 in the front diff or Hypoid oil without the LS additive.. 2- Do not use Mobil 1 75W-90 synthetic in the rear diff (I bought Mobil 1 LS lubricant 75W-90 which clearly states that it is for LS differentials). I can use reg 75W-90 hypoid oil with the 4oz. of LS additive. Can I use all 7 ounces? # 3-- How do I change the transfer case oil and what type of oil do I use?

 

How simple is it to change the transfer case oil? Are there any pics in doing this?

 

dgerm's the man: http://www.tacomaworld.com/forum/4-cylinder/37648-complete-30k-maintenance.html

Trust me, it's very easy.

 

To everyone on this forum that has answered my questions on HOW TO, I thank you very much and appreciate all your replies..I have completed the rear diff, front diff and transfer case oils and "YES" CHRIS4X4 was right on with the oil sugestions and spark plug write up was very useful and completed the project sooner than I thought. I am a new member and very happy that I joined such an informative club and the members are GREAT!