I went to to buy the factory recommended Limited Slip 75W-140 Full Synthetic Gear Oil https://amzn.to/3PVe6Ac but its out of stock everywhere for several months. not sure if they aren't making it anymore or what.
Does it just need to be API GL-5 or are their other requirements for the limited slip?

 

I believe as long as it's limited slip and the correct weight that is all you need.

I used the Liqui Moly in my '14 E63s:
https://www.fcpeuro.com/products/bmw...z4-83222282583

 

Valvoline makes a product with a LSD additive as well. I have used it in three of my vehicles with no issues.

 

Mercedes Differential Oil SAE 75W-140 Motul Gear Competition 105779 001-989-52-03-10 001989520310 001 989 52 03 10 3374650011455 001.989.52.03.10 | Pelican Parts

Castrol - 001989520310 - Castrol SAF-XJ (75w-140) - 500mL (ecstuning.com)

 

https://www.amazon.com/dp/B00C3JWPDG?psc=1&ref=ppx_yo2ov_dt_b_product_detail s

CASTROL GEAR OIL 75W140 SYNTRAX LONGLIFE - 558.00.97 - CASTROL - Content: 1,0 l

Can this one be used?

Edited: Never mind, it's for open differential cars.

 

All the videos I found indicating that for LSD both wheels spin same direction, for Non-LSD wheels spin opposite direction. My wheels spin only one at a time. Spin one, the other stay still. Does it also mean that I have Non-LSD? I can't seem to find any video/article supports this.

 

I found a few of the 0.5l castrol from the dealer from ebay https://www.ebay.com/itm/175037966160 pn 001 989 52 0310

 

what are we putting that oil in

 

Hopefully the rear differential. This oil is for the LSD option 471.

 

Did you check with your local dealer? Mine has those for $25/500ml bottle.

 

FCP Euro has them at $20 each. https://www.fcpeuro.com/products/syn...castrol-1543c9

 

Sweet, good to know there's options. I bought them from that eBay link, two for $30

 

Going to pickup up some rear diff. fluid over the weekend . My dealer said the plugs dont have any gaskets. What type of ptfe or sealant can be used on the rear diff. drain plugs ? saw the GM pipe sealant with ptfe mentioned at one point .. Two 0.5Liter bottles covers it correct

 

When I look at the current approved oil spec 235.61, the only one listed is "Castrol Transmax Limited Slip LL 75W-140" Attached is the chart for the various oil specs.

Regards,

Joe

 

You will need 3 (0.5 L) bottles of the 75W140 Castrol Transmax Limited Slip. I recently did mine and it took about 1.2-1.3L before it started coming out of the fill hole.
I personally didn't use any thread sealant as the threads are tapered to create a seal without the need for a crush washer or sealant. I have no leaks. You're welcome to use sealant if you prefer, I'm sure it wouldn't hurt.

 

Same here, I've never used sealant on any of my rear diffs, it won't leak once you get it tightened.

I'd recommend picking up a bottle pump too, clearance is tight back there for the taller bottles that have a squeeze tube (which you may need to cut off to fit the pump) but it saves your hands a workout.