Always use luca 80w-90 in ford ranger 2.3l, 7.5" rear diff. wanted to try this. any issues with it being a 75w vs 80w? is this better than lucas?

I use the royal purple 75w-90 in my RAM 2500 differential. My differential is made by American Axle Manufacturing and I talked with one of their mechanical engineers who said the viscosity requirement is determined by several criteria with ambient and operating temperature being big determinants. I live in a warm climate so he said I could use a heavier weight oil. With that knowledge I don't believe there is a big enough difference between the 75 and 80 other the better lubricity at lower ambient and operating temperature. He did recommend amsoil but said the royal purple is just as good.

I have graphite/ composite synchronizers in my transmission , will they be damaged by the use of anything other than the "Castrol syntorque" recom

I've had the best experience with Redline MT90 in manual transmissions. RP was not working well with syncros (grinding gears when shifting).

I know that the product description says that it is not for use in wet clutch systems, but will it be okay for use in motorcycle final gear (shaft)

Will be fine as a motorcycle final gear oil. I use this product in two BMW motorcycles, a BMW R1150RT and a R1200S, as a final drive oil and also as the transmission oil.

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01300 Max Gear 75W-90 High Performance Synthetic Automotive Gear Oil , 1 Quart (32 Ounces)

Product ID: 2251740

Details

Brand
Royal Purple
Item Weight
1 Pounds
Liquid Volume
1 Quarts
Material
Synthetic
Package Information
Bottle

🔥Synthetic base - high-temp stability & smoothness

⚙️75W-90 Viscosity - optimal gear protection

🛡️Synerlec additive - superior wear defense

49549CFA

Duties & taxes included

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚙️ Elevate your drive with gear oil that works as hard as you do!

TRUSTED TOP RANKED - Join thousands of pros who rate it 4.8/5 and trust Royal Purple for peak drivetrain performance.
VERSATILE APPLICATION - Perfect for trucks, RVs, marine engines, and manual transmissions requiring API GL-5/GL-4 standards.
NO EXTRA ADDITIVES NEEDED - Pre-formulated with hypoid friction modifiers, ensuring clutch-friendly performance out of the bottle.
SYNERLEC ADDITIVE TECHNOLOGY - Experience unmatched gear protection and friction reduction for quieter, cooler operation.
ULTRA TOUGH SYNTHETIC FORMULA - Maximize gear life with cutting-edge synthetic oils engineered for extreme conditions.

Royal Purple 01300 Max Gear 75W-90 is a premium synthetic gear oil designed to protect and enhance heavily loaded gears in trucks, RVs, marine engines, and manual transmissions. Featuring proprietary Synerlec additive technology, it reduces friction, heat, and wear, ensuring smoother, quieter, and longer-lasting gear performance without the need for additional additives.

Specifications

ASIN	B0007QGT34
Best Sellers Rank	#10,231 in Automotive ( See Top 100 in Automotive ) #20 in Gear Oils
Brand Name	Royal Purple
Container Type	Bottle
Customer Reviews	4.8 4.8 out of 5 stars (1,542)
Global Trade Identification Number	00641330013003
Included Components	Auto part, Automotive Accessories, Replacement and Performance parts
Item Form	Oil
Item Type Name	Gear Oil
Item Weight	1 Pounds
Liquid Volume	1 Quarts
Manufacturer	Royal Purple
Material	Synthetic
Model Number	ROY01300
Number of Items	1
Part Interchange Info	01300
Part Number	01300
Recommended Uses For Product	Vehicle,Truck
Specific Uses For Product	Improve power and protection for heavily loaded gears in trucks, automobiles, and marine engines
UPC	641330013003
Unit Count	32.0 Fluid Ounces
Viscosity	75W-90
Warranty Description	Manufacturer Warranty

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TrustScore 4.5 | 7,300+ reviews

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