does this have the friction modifier already in it for limited slip rears?

No, if your differential calls for the additive, you have to add some anyways. This is the case with dodge differentials 8.25" and 9.25" in the rears with limited slip. The OEM manual should say to add it if its limited slip or has trak-lok. Excerpt from manual "Trac-lok™ equipped axles require a friction modifier be added to the lubricant."

I have a G80 locker differential in my 99 silverado and not limited slip. Is this the correct stuff?

yes, for use with or without limited slip

I have a 1980 350 chevy dump truck.. can I use this fro gear oil??

Yes you can, it is a synthetic gear oil and also designed for limited slip gearing.

what is best gear oil for1983 300d 123 mercedes . n.russell

Not knowing the specifications for gear oil *rear end oil" for Mercedes, which I expect will be the same as most every automobile since about 1990 or thereabouts, This Lucas oil is the best there is. Most auto manufactures spec oils and greases with "proprietary" numbers, but the product on the inside of the can has the same specifications pretty much.

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Description

⚙️ Gear up with Lucas Oil – where performance meets protection!

EXTREME PRESSURE DEFENSE - Special additives cushion gears, preventing wear and noise 💪
PRECISION VISCOSITY CONTROL - SAE 75W-90 formula ensures smooth shifting and optimal performance ⚙️
UNMATCHED THERMAL STABILITY - Keeps your gears slick even under extreme heat 🔥
LONG LASTING SYNTHETIC FORMULA - Non-foaming, super slick oil that outperforms conventional lubricants
VERSATILE HIGH PERFORMANCE USE - Perfect for heavy-duty, limited slip differentials, and high-temp environments

Lucas Oil 10047 SAE 75W-90 Synthetic Transmission and Differential Lube is a premium synthetic lubricant engineered for heavy-duty and high-performance vehicles. Its advanced additive package provides superior gear cushioning and noise reduction while maintaining viscosity and lubricity under extreme temperatures, ensuring extended gear and bearing life.

Specifications

Material	Synthetic
Brand	Lucas Oil
Package Information	Bottle
Liquid Volume	1 Litres
Item Weight	227 g
Recommended Uses For Product	Vehicle
Viscosity	SAE 75W-90
Specific Uses For Product	Heavy-duty applications, high-performance applications, limited slip differentials, high temperature environments, gear noise reduction, bearing life extension
Item Form	Oil
Global Trade Identification Number	00049807100476
Manufacturer	Lucas Oil
Net Quantity	946.35 Milliliters
UPC	049807400477
Number of Items	1
Model	LUC10047
Product Dimensions	8.26 x 8.26 x 8.26 cm; 226.8 g
Item model number	051-507
Manufacturer Part Number	051-507
OEM Part Number	10047
Volume	1632 Cubic Inches
Size	Others
Colour	Multi-Colored
Assembly Required	No

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