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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Description

⚙️ Shift smarter, drive smoother — the ultimate gear oil upgrade!

BRASS SAFE FORMULA - No reactive sulfurs to damage sensitive brass synchros—drive worry-free
VERSATILE COMPATIBILITY - Ideal for GL-1, GL-3, and GL-4 applications plus special synchromesh fluids
PRECISION GEAR PROTECTION - Extends synchro life with high-performance GL-4 lubrication
TRUSTED LEGACY PERFORMANCE - Red Line’s proven formula since 1979 outperforms and outlasts competitors
SEAMLESS SHIFTING EXPERIENCE - Eliminates notchy shifts even in cold starts for smooth drives

Red Line50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant is a premium 1-quart gear oil designed to protect and extend the life of manual transmissions. Its 75W-90 viscosity ensures optimal lubrication, while a brass-safe GL-4 formula prevents synchro damage and guarantees smoother, quicker shifts even in cold conditions. Trusted since 1979, this lubricant is compatible with GL-1, GL-3, and GL-4 applications, making it the go-to choice for professional-grade transmission care.

Specifications

Material	Brass
Brand	Redline Oil
Package Information	Bottle
Liquid Volume	32 Fluid Ounces
Item Weight	1.7 Pounds
Recommended Uses For Product	Lubricant,Lube
Viscosity	75W90
Specific Uses For Product	Lubricant for manual transmissions and transaxles, Prevent corrosion, Enable smooth shifting, Provide gear protection
Item Form	Fluids,Oil
Global Trade Identification Number	00083522503044
Manufacturer	Yukon Gear & Axle
Unit Count	32.0 Fluid Ounces
UPC	083522503044
Number of Items	1
Model	MT90 75W90 GL4 QT
Item Weight	1.7 pounds
Product Dimensions	9 x 4 x 4 inches
Item model number	50304
Is Discontinued By Manufacturer	No
Manufacturer Part Number	50304
OEM Part Number	50304

Reviews

M**W

Worth it

Used in my 2002 7.3 with a ZF6. This stuff is awesome transmission is quieter and shifts smooth. Just wish Redline used a bag instead of the hard bottle. It is a real pain to fill the case but worth it.

14.09.2025

J**T

Noticeably improved shift feel

Replaced manual transmission oil in Miata 6-speed and it made a surprisingly big difference in shift feel. Especially noticeable when shifting to reverse.

13.09.2025

R**O

Z32 transmission

Its the best fluid you can use on your Nissan 300zx Tranmission.

14.09.2025

N**N

Gets good reviews

5 star only because it got here quick and was priced well.Been to lazy to work on car.Will update when I decide to do something.

2.09.2025

J**S

The best out there

Best fluid. I use it in my 94 Miata and my 337 MK4 GTI. Noticeable improvement in gear changes and way less gearbox noise.

31.08.2025

R**D

FANTASTIC FOR TOYOTA MANUAL

I have a 2015 Scion XB (Toyota) manual transmission and changed it a few weeks ago and used that Ultra 1 GL-4 and my manual transmission started having clunky gear shifts. I just changed it to Red Line MT-90 that's actually recommended by Toyota and what a difference. Immediately felt the shifting smooth as silk. Oh well, live and learn. Buy what's recommended by the mfg because they know what they are talking about. My fault.

20.07.2025

1**4

Great for manual transmissions that’s take 75w-90

Best manual transmission fluid out there. Instantly cleared up a third gear synchro grind.

14.08.2025

L**

Manual Transmission Lubricant Supreme

Redline lubricants are a premium synthetic oil product for your automobile needs. I utilize it in my classic Alfa Romeo Manual Transmission. Redline surpasses anything that was available when my Alfa was new. It really clings to the gears and shifts effortlessly with no grinding. This product works for most manual gear boxes but always verify with your owners manual. Larry Hunt

2.07.2025

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