Red Line50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL)- 1 Quart
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Red Line50304 MT-90 75W-90 GL-4 Manual Transmission and Transaxle Lubricant (MTL)- 1 Quart

4.9/5
Product ID: 2219323
Secure Transaction
12 interest-free installments with tabby

Details

  • Material
    Brass
  • Brand
    Redline Oil
  • Package Information
    Bottle
  • Liquid Volume
    32 Fluid
  • Item Weight
    1.7 Pounds
⏱️Reduces notchy shifting for quicker, smoother gear changes
⚙️75W-90 viscosity for optimal gear protection
🛡️GL-4 rated, safe for brass synchros, prevents corrosion

Description

⚙️ Shift into the fast lane with flawless precision!

  • VERSATILE COMPATIBILITY - Perfect for GL-1, GL-3, and GL-4 applications—one bottle, multiple uses, zero compromises.
  • SYNCHRO FRIENDLY FORMULA - GL-4 rating means zero damage to brass synchros, extending your transmission’s life.
  • PRECISION GEAR PROTECTION - Advanced 75W-90 viscosity ensures your transmission stays flawless under pressure.
  • TRUSTED LEGACY PERFORMANCE - Since 1979, Red Line’s uncompromising quality keeps your ride performing at its peak.
  • SEAMLESS SHIFTING EXPERIENCE - Eliminates notchy shifts even in cold conditions—because every gear change should feel effortless.

Red Line 50304 MT-90 is a premium 75W-90 GL-4 manual transmission and transaxle lubricant designed to protect gears, extend synchro life, and enable smooth, quick shifting even in cold conditions. Safe for brass synchros and compatible with GL-1, GL-3, and GL-4 applications, this 1-quart bottle delivers trusted performance from a brand established in 1979.

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Specifications

MaterialBrass
BrandRedline Oil
Package InformationBottle
Liquid Volume32 Fluid Ounces
Item Weight1.7 Pounds
Recommended Uses For ProductLubricant,Lube
Viscosity75W90
Specific Uses For ProductLubricant for manual transmissions and transaxles, Prevent corrosion, Enable smooth shifting, Provide gear protection
Item FormFluids,Oil
Global Trade Identification Number00083522503044
ManufacturerYukon Gear & Axle
Unit Count32.0 Fluid Ounces
UPC083522503044
Number of Items1
ModelMT90 75W90 GL4 QT
Item Weight1.7 pounds
Product Dimensions9 x 4 x 4 inches
Item model number50304
Is Discontinued By ManufacturerNo
Manufacturer Part Number50304
OEM Part Number50304

Have a Question? See What Others Asked

Is anyone running this in an NV4500 long term? How does it hold up?
Do I pour the entire contents directly in? Are there any special instructions?
Is this product non-synthetic gl-3?
Can i use on 1992 chevy camaro rs?

Reviews

4.9

All from verified purchases

J**O

Red Line products are top shelf

I put this in the transmission of my ‘52 MG and it really helped and made it quieter.

B**L

Great product

You know the deal one of the best transmission oils on the planet

B**N

Arrived very quickly!

I have used this gear oil exclusively in the past for my BMW 6 speed transmission, which requires just under two quarts. I only purchased one quart this time around because I'm using it together with a different type of gear oil in hopes of quieting gear rattle due to the installation of a single mass lightened flywheel.

R**D

Super oil

Great product

P**R

Great product

Great stuff. Smoothed my shifting out in my 2007 fj cruiser.

J**.

Great oil !!

I bought a used 2007 Pontiac Vibe in 2021 with 140k miles, it always had a slight grind in the 5 speed transmission, when shifting into 3rd gear, the previous owner took good care of the car with all receipts of everything that had been done to the car, only problem was, when they changed the transmission oil they put GL-5 in it, I had read that others had the same problem, and after doing a lot of research on it, I thought what do II have to lose, after putting MT-90 75W-90 oil in it it stopped grinding almost instantly, smooth the shifts out in all gears and no more grinding in 3rd gear, I have to admit I was skeptical, that it would work, but it made a believer out of me !!! Redline makes a good product !!

M**N

Best for Tacoma 5spd (2003)

2003 toyota tacoma Xtra Cab 4x4 - 2.7L - 5spdChanged all the gear fluids 2x-3x in my 180k mile taco over the past 2 weeks. I let the tcase & trans drain for a couple hours (hot) & it took about 1.3quarts in the tcase and a little over 2.6quarts in the transmission. You could get by with 4 quarts, but I like the feeling of pumping it in until it dribbles out (which took 4quarts point something total; so i'd order 5quarts). And here is what I noticed:1) An average of about 20miles worse mpg on an entire tank of gas compared to synthetic GL5 fluid (in manual transmission and transfer-case)(355miles @ 15.5 gallons vs. 375mi @ 15.5gal)2) Much smoother shifting in manual trans compared to other older gl4 formulas & newer gl5 stuff. The clutch contains a larger friction zone. Now whether this extra smoothness actually causes more wear or not I have no idea.I'm pretty sure, people worried about copper or brass in your syncros or tranny / t-case need not be worried with the gl5 fluids. Most gl5 fluids say safe for brass on the bottle. Having said that - there's an obvious difference between safe for 100k miles and safe for the 400k i'm trying to hit. EDIT: changed my mind. Worth 5 stars. Saw the Walmart fluid after 10k miles. $#%& the Walmart GL-5 especially in hypoid gears. I'm serious... don't be stupid like me. I probably took 10k to 50k off my rear diff life (which I expect 400k out of) by running walmart fluid for 10k miles @ 90 to 105mph. If you're not going above 75mph or towing you might be ok.A word about fluid change intervals just from what I've seen in my truck (toyota recommends 30k miles for all fluids):Rear Diff - 30k is likely a tad long for the rear diff (20-25k feels better) - but I regularly drive thousands of miles at 90mph. If you aren't towing, driving about 80mph, or doing other stressful differential (for hypoid diffs) driving then 30k is probably ok. @ 70k-150k miles the rear diff fluid was black as hell and saturated with fine particulatesFront diff - I barely use 4x4 (maybe 10x a year for 10 miles at a time. There was pretty much absolutely no wear on the front diff fluid in 70k miles.transfer-case - noticeable mechanical wear of oil (splashy - not thick like syrup), minimal particulates, but still good protection in 70k miles (change whenever)transmission - particulates and mechanical wear, decent wear on the fluid in 35k miles (stick with 30k-ish)Hope sharing that experience helps. Best of luck.P.S. - look at your power steering fluid (suck out the reservoir with a turkey baster & put in new stuff - drive & repeat). Ran 110k to 165k on the original ATF in the power steering system. That was risky.

C**.

Miata trans oil

Used in an NA and NB MiataNo shifting issues.

Common Questions

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ayesha M.

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

5 days ago

Meera L.

Smooth transaction and product arrived in perfect condition.

3 weeks ago

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Secure Transaction
12 interest-free installments with tabby

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Sneha T.

Received my product in pristine condition. Great service overall.

1 month ago

Yusuf A.

Fantastic experience overall. Will recommend to friends and family.

1 month ago

Red Line50304 Mt 90 75w 90 Gl 4 Manual Transmission | Desertcart KSA