ACDelco GM Original Equipment 10-4034 Dexron LS 75W-90 Gear Oil - 32 oz

I flushed my diff twice using 6 of these quarts and my rear diff is quiet even in 40 degree temps. I followed the TSB instructions driving in circles etc.

I bought this gear oil to replace the differential fluid on my 2018 Camaro SS and so far, so good! I mean it's OEM, so it better work! I had to buy a hand pump to get it flowing, but it was such an easy job, I think anyone can do it. The price seems to have gone up about $10 since I last bought it, but I think it's worth changing out if your car has never had it done before.

You can't go wrong with factory fluids

Great quality diff fluid to replace on c6 corvette as it did reduce rear axle noise immediately.

The local dealership wanted $40 a quart for this. Um, no. This is why Amazon wins a lot of my business if I can wait for car parts.

This is the real thing and replaces the fluid originally required for the limited slip rear axle in a GM Quadrasteer truck.

Limited slip additives are already in this oil, so my GM truck's clutch packs for limited slip should be safe. For price & lack of information I deduct one star. Is this product hygroscopic? I have no idea. GM is very ambiguous when it comes to their description of the product. The way GM packages this, I assume products like Redline, or Royal Purple may actually be better. They cost the same or less, and give LS protection. I also only give four stars because this product's price is way up there with racing blends like Royal Purple, Redline, or other high performance racing products. I have no idea what type of synthetic this is. At least Redline tells their customers what they use as a feedstock base for their formulation. Delco, BMW, Volvo, Motorcaft, Mopar, Valvoline all keep it some deep dark secret, so I have no idea what to expect this product to do to certain materials. Just because GM says it is what should be used on GM manual transmissions & rear ends is just not quite good enough. I remember when GM's limited slip was new. My father's 4 speed Positrack dual exhaust 348 6 Pack Offie Impala, went through a clutch pack every 6-8 months.

After changing my gear oil at 5k miles to Mobil 1 gear oil, I started to hear a groan from the rear end while backing up cold and turning. After doing some research, I changed the gear oil to ACDelco Dexron, and my issue was solved.