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

I have an 07 Off Road TRD. 175K. Just changed the rear diff and added Mobil1 75W90 synthetic Gear Lubricant LS. I know I have the e locker rather than the LS diff. Is the LS synthetic going to hurt the non LS diff? Can I use the same in the front diff and transfer case?
FWIW mine took 3.4 qts.

 

@zilwin Should be no problem to run LS type in a non-LS diff. Just cant go the other way around. I also used LS type with auto-LS not mechanical.

 

+1, would also like to know

 

We need to get people reading. The post between yours and the one you quoted answered your question

 

Was referring to X-case. Safe to run this?...
Mobil 1 full synthetic

$30 75W-90 Synthetic Gear Lube - 1 Quart (Pack of 2)

75W-90 w/ limited slip modifier (pic attached)

 

I run this in front, tcase, and rear diff on my '13 TRD-OR...

 

Awesome. Thank you everybody for input

 

Yep, I put that stinky shit in everuthing

 

So the manual (at least on mine) calls for 3.12 quarts of fluid. Your think just 3 is fine?

 

no

 

I ended up just buying a 4th quart

 

Mine took a little over 3 qt. Probably about 3-1/4-3-1/3. Could probably get away with 3 if you didn't let it trickle out as long as I did.

My magnet was pretty good looking. Two tiny shards and a thin film of metal "goop" in the form of shavings. Nothing alarming for almost 100k, IMO. I went with the Mobil1 mentioned above.

 

This is a GL-5 fluid. Most manual transmission call for GL-4.
Related to the the EP additives in the GL-5 fluid being sulphur based and this can eat away at bronze parts like the synchro rings in manual transmissions.

From my owners manual
Manual transmission
Gear oil API GL-3 (GL-4)

You probably want something like MT-90 75W90 GL-4 Gear Oil

"Safe for brass synchros, as it lacks the reactive sulfurs found in most GL-5 oils that cause damage"

 

I meant the manual for the truck. I ended up buying the 4th quart to get the last 0.12 quarts for the rear diff.

 

is there a tool that makes refilling the easier?

 

$8 Lubrimatic 55-001 4CC Fluid Pump for Quart Size Bottles

http://www.amazon.com/Plews-55001-L...UTF8&qid=1459886628&sr=1-1&keywords=hand+pump

 

Thank you very much! just remember "Never drink and Prime...!" The boxes and subsequent bills will overwhelm you...

 

Yeah seriously! I'm addicted to Prime. My best drunk prime purchase was a pack of 10 emergency blankets...

 

I apologize if this has already been addressed in the preceding 107 pages of posts, but use a 15/16 socket instead of a 24mm socket for the differential fill and drain plugs on the Tacoma. Also be sure to use a hex socket and not a 12-point socket.