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)

Product ID: 19688723

Details

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

⏱️Friction formula for smoother, quicker shifts

⚙️75W-90 viscosity for optimal gear protection

🛡️GL-4 safe, protects brass synchros from damage

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Description

⚙️ Shift into the fast lane of gear protection and smoothness!

SYNCHRO SAFE FORMULA - Free from reactive sulfurs found in GL-5 oils, ensuring brass synchros stay damage-free.
UNMATCHED GEAR DEFENSE - High-performance formula extends synchro and gear life under all conditions.
VERSATILE COMPATIBILITY - Ideal for GL-1, GL-3, and GL-4 applications, covering a broad range of manual transmissions.
TRUSTED LEGACY SINCE 1979 - Red Line’s proven performance means no compromises on protection and reliability.
SEAMLESS SHIFTING EXPERIENCE - Perfect synchronizer friction coefficient eliminates notchy shifts, even in cold starts.

Red Line 50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant is a premium gear oil designed for superior protection and longevity of manual transmissions. Its advanced formula ensures quicker, smoother shifts by optimizing synchronizer friction, while being safe for brass synchros by excluding harmful reactive sulfurs. Trusted since 1979, this lubricant supports GL-1, GL-3, and GL-4 applications, making it a versatile and reliable choice for professional-grade vehicle maintenance.

Specifications

ASIN	B00NT5V8RW
Best Sellers Rank	#2,194 in Automotive ( See Top 100 in Automotive ) #5 in Gear Oils
Brand Name	Red Line
Container Type	Bottle
Customer Reviews	4.9 4.9 out of 5 stars (5,018)
Item Form	Oil
Item Weight	1.99 Pounds
Liquid Volume	64 Fluid Ounces
Manufacturer	Red Line
Material	Oil
Model Number	50304
Number of Items	2
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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