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

Product ID: 2251740

Details

Brand
Royal Purple
Item Weight
16 ounces
Liquid Volume
1 quarts
Material
Synthetic
Package Information
Bottle

🔥Synerlec additive boosts performance & durability

🚛Ideal for trucks, RVs, marine & manual transmissions

⚙️75W-90 viscosity for optimal gear protection

225.97 DT

Duties & taxes included

In stock

Sold byAmazon TunisiaDelivered 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!

HEAT WEAR RESISTANCE - Keeps gears cooler under heavy loads, extending overhaul intervals
MULTI USE COMPATIBILITY - Perfect for front/rear differentials, manual transmissions & marine lower gears
NO EXTRA ADDITIVES NEEDED - All-in-one formula engineered for peak performance out of the bottle
SYNERLEC ADDITIVE TECHNOLOGY - Exclusive friction modifiers for smoother, quieter rides
ULTRA TOUGH SYNTHETIC FORMULA - Maximize gear life with advanced synthetic oils

Royal Purple Max Gear 75W-90 is a premium synthetic gear oil engineered with proprietary Synerlec additive technology to deliver superior protection, reduce friction, and extend gear life in trucks, RVs, marine engines, and manual transmissions. Trusted by professionals, it ensures smoother, quieter, and cooler operation under heavy loads without the need for additional additives.

Specifications

ASIN	B0007QGT34
Best Sellers Rank	#11,353 in Automotive ( See Top 100 in Automotive ) #27 in Gear Oils
Brand Name	Royal Purple
Container Type	Bottle
Customer Reviews	4.8 4.8 out of 5 stars (1,551)
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	16 ounces
Liquid Volume	1 quarts
Manufacturer	Royal Purple
Material	Synthetic
Model Number	ROY01300
Number of Items	1
Number of Packs	1
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 Fluid Ounces
Viscosity	75W-90
Warranty Description	Manufacturer Warranty

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

Ayesha M.

The product exactly matches the description. Very satisfied with my purchase.

5 days ago

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