75W-90 oil okay for rear differential?

I have a 2005 TRD Off Road 4X4 with a rear locker, doesn't need the LSD additive in the rear differential. The manual says to use 90W or 80W-90. Would it be ok to use

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

75W-90 synthetic? I'm going to be buying 75W-90 synthetic for the front differential and transfer case and wondering if I could also use it for the rear differential?

 

I used Castrol

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

75W-90 synth in the rear diff and got some chatter when accelerating out of a corner. Changed to Quaker State (i.e. Shell) 75W-140 synth and the chatter was gone.



I use Lucas 75W-90 synth in the front diff and T-case because it stinks less than the other brands. Used the same in my Subaru's front and rear diffs.

 

Depends on climate. We use 75W90 on almost all final drives in Canada.

 

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

75w-90 is perfectly ok unless you are doing constant heavy fast towing.

 

I use Lucas

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

75W-90 synth in the front diff and T-case because it stinks less than the other brands. Used the same in my Subaru's front and rear diffs.[/QUOTE]

Didn't use the Lucas in the rear differential also? The auto parts store I went to had the Lucas in 75W-90 synthetic so thought I might try that brand.

 

As I wrote earlier, I got some chatter with

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

75W-90 synth. I put Quaker 75W-140 synth in the rear diff in 2014 and the chatter went away. Not due for another change until 2017, at which point I will probably go with Quaker 75W-140 again.

Note: The "140" means 75W-140 oil can withstand higher temperatures without thinning out, so it can protect the diff better in abusive conditions (burnouts, one-wheel-peel, etc.) than 75W-90. Only thing preventing wider adoption of this oil is the higher cost.

 

Why does the stuff the dealer wants to sell me 4x the price!???

 

75/90 80/90 same thing

 

because they have to pay for that fancy showroom. As far as the smell you only have to smell it when changing. Maybe the stinky stuff works better.

 

This shit.

 

Because Toyota adds 300% markup, then the dealer adds 35% on top of that...

For Canadians:

$18 Lucas Oil 10121 SAE 75W-140 Synthetic Gear Oil/Transmission and Differential Lube - 1 Quart

http://www.amazon.ca/Lucas-Oil-10121-Transmission-Differential/dp/B000BCKWVE/

$51 Lucas Oil 10122 Synthetic SAE 75W-140 Gear Oil - 1 Gallon

http://www.amazon.ca/Lucas-10122-140-Synthetic-Gear/dp/B000IG7PMM/ Lol it looks like a bleach bottle.

 

Yes any synthetic gear lube 75w90 is fine for your application. 75w85 vs 75w90 vs 80w90 is not going to make any real difference, *unless you are hauling or towing regularly or long-distance* (as nd4spdbh posted above).

 

so if one does do a fair amount of towing , which weight would be the best? thanks

 

I never use synthetic!

 

Yah....If I haul dick with a 3k load behind me at all times then which weight would be appropriate?

 

I'm running Chevron full synthetic 75W90 in mine - open diff so no LSD additive. Works well for the big stuff grossing out at 140,000 lbs all day long with 300,000 mile change interval, so I'm not concerned about towing measly few thousand pounds when I change it every 30,000 miles of so.

I'm running the same stuff in my front diff and transfer case.

 

famous 187: occasional hauling or towing is not really severe service IMO. Go with the any of the viscosities recommended above but check the level often and change it at regular intervals. Consider a high-end lube -- I use AMSOIL long life synthetic gear lube 75w90 in my 2wd open differential. I haul 800-1200 pounds for 100 miles each way, about 8 times a year. I check the level and condition of the fluid once a year.

Sold My Subaru: hauling 3,000 lb of dick at all times, that is severe service. I'd suggest using a 75w110 or 75w140, that is specifically designed for severe conditions. That is a lot of dick.

What's most important: severe service means check it often and change it regularly.

 

They aren't called the "stealership" for nuthin.

 

Yah hauling around 3k regularly would be pretty severe for the taco's rear end. I've been happy with the spec fluids thus far. I change it religiously every 30k.