gear oil question

i read, a lot, and ran into too much information situation

2015 trd offroad here - not lsd additive im aware, same crush washers i have around for motor
oil changes i take it, 36lbs of forces give or take im not torqing mine, never have, been changing oils for 20 years

seems like consensus is 75w90 is fine for differentials
as opposed to 75w85??

i want to run conventional rear diff oil, not synthetic, because
we run a lot of water where i live...

thinking of grabbing royal purple even though its expensive, valvoline is tempting
75w90 too, i think they make good oil...


thanks

 

Nothing after 2009 has a mechanical LSD, if I remember correctly.

The crush washers are different (larger, and metal). You can get them on Amazon, I think they're about the size of a quarter. (You can pull and check the fill port ahead of time if you want). Front and rear diffs are different.

Whatever kind of gear oil you like works. I buy the gallon jugs, and have one old quart bottle on hand to refill and squeeze it in.

If this is your first time doing this car, the plugs might be tight AF. Sounds like you have some experience, so just take your time to avoid stripping the bolt heads.

The front diff allen key bolts can really suck, make sure you clean them out before trying to insert the wrench, to get good contact.

As always, remove the fill plug first, so you don't end up stuck if you can't get it out after draining.

 

thanks! i did the job on my 2004 t4r, years ago, and over the years i have a lot of washers for oil changes, ill look to see about the size of ones i have. thanks for reminded on sequence of removing plugs because yeah, dont want to drain if ya cant fill

i love history searches on here, i guess i put this in my 4runner

tempted to run this same lucas oil!!!!

never did a front change, but i did tcase, so i want to do front rear and t case on my new to me truck. good point on allen key, tap her in a bit with soft mallet?

 

I use Lucas 85-140. If I recall correctly someone did a test some years ago and royal purple performed the worst

https://eastcoastgearsupply.com/ft-...IIlMhHI7QGBEZ83nWmd58vEa17AGBT-rNS_rWP15qhrKv