⚙️ Shift smarter, not harder — gear up with Red Line!
Red Line 50304 MT-90 is a premium 75W-90 GL-4 manual transmission and transaxle lubricant designed to deliver superior gear protection, extend synchronizer life, and enable smoother, quicker shifts even in cold conditions. Its unique formula is safe for brass synchros, avoiding damage common with GL-5 oils, making it the trusted choice for professional-grade manual transmission maintenance.
| Material | Oil |
| Brand | Red Line |
| Package Information | Bottle |
| Liquid Volume | 64 Fluid Ounces |
| Item Weight | 2 Pounds |
| Recommended Uses For Product | Gear Oil |
| Viscosity | 75W90 |
| Item Form | Oil |
| Manufacturer | Red Line |
| Unit Count | 64 Fluid Ounces |
| UPC | 737534816592 |
| Number of Items | 1 |
| Item Weight | 1.99 pounds |
| Product Dimensions | 7 x 7 x 12 inches |
| Item model number | 50304 |
| Is Discontinued By Manufacturer | No |
| Manufacturer Part Number | 50304 |
| OEM Part Number | 50304-2 |
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.
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.
R**O
Z32 transmission
Its the best fluid you can use on your Nissan 300zx Tranmission.
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.
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.
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.
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.
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
Trustpilot
1 week ago
1 month ago
