Is anyone running this in an NV4500 long term? How does it hold up?

I've been running it for 35,000 miles in my 1996 model GM NV4500 without issue.

Do I pour the entire contents directly in? Are there any special instructions?

To get maximum benefit of the Red Line you need to replace all the oil in the transmission. For my car, it took 3.4 quarts so I bought four and filled it up until fluid was level with the bottom of the fill plug. If you go to the Red Line website, they have which transmission oil is correct for your car and the capacity of the transmission so you will know how much you will need.

Can i use on 1992 chevy camaro rs?

I would not. It is supposed to be OEM recommended for my 98 vw Cabrio 5speed. So Put $46 worth in and at0°F I could not shift the car until 30 minutes of idling. second Synchromesh was very fussy at 20deg

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50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Quart (2 Pack)

50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL) - 1 Quart (2 Pack)

Product ID: 19688723

Details

Brand
Red Line
Item Weight
2 Pounds
Liquid Volume
64 Fluid
Material
Oil
Package Information
Bottle

⏱️Faster, smoother shifts even in cold temps

⚙️75W-90 viscosity for optimal gear protection

🛡️GL-4 safe formula protects brass synchros

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Description

⚙️ Shift Like a Pro, Protect Like a Boss

TRUSTED LEGACY - Red Line’s proven performance since 1979—no compromises, just results
COLD WEATHER READY - Maintains perfect synchronizer friction even at low temperatures
EFFORTLESS SHIFTING - Eliminates notchy, crunchy shifts for buttery smooth gear changes
SYNCHRO SAFE FORMULA - Free from reactive sulfurs that damage brass and bronze components
PRECISION GEAR PROTECTION - Extends synchro life with high-performance GL-4 lubrication

Red Line 50304 MT-90 is a premium 75W-90 GL-4 manual transmission lubricant designed to deliver smoother, faster shifts and extend synchro life. Its unique formula protects sensitive brass synchros by avoiding harmful sulfurs found in GL-5 oils, making it ideal for manual transmissions and transaxles requiring GL-1, GL-3, or GL-4 gear oils. Trusted by enthusiasts since 1979, this lubricant ensures reliable performance across a wide temperature range, eliminating notchy shifting and enhancing gear engagement even in cold conditions.

Specifications

ASIN	B00NT5V8RW
Best Sellers Rank	#2,343 in Automotive ( See Top 100 in Automotive ) #6 in Gear Oils
Brand	Red Line
Brand Name	Red Line
Container Type	Bottle
Customer Reviews	4.9 out of 5 stars 4,993 Reviews
Item Form	Oil
Item Weight	2 Pounds
Liquid Volume	64 Fluid Ounces
Manufacturer	Red Line
Material	Oil
Model Number	50304
Number of Items	2
Package Information	Bottle
Part Number	50304
Recommended Uses For Product	Gear Oil
SAE J300 Viscosity Grade	75W-90
Specific Uses For Product	Manual transmissions and transaxles, GL-1, GL-3, and GL-4 applications
UPC	737534816592
Unit Count	64 Fluid Ounces
Viscosity	75W90

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