⚙️ Shift smarter, drive smoother — never settle for less!
Red Line MT-90 75W-90 GL-4 Manual Transmission Lubricant offers high-performance gear protection and longer synchronizer life. Engineered for GL-1, GL-3, and GL-4 applications, it ensures quicker, notch-free shifting even in cold conditions. Its unique formula is safe for brass synchros, avoiding damage common with GL-5 oils. Trusted since 1979, this 1-quart lubricant delivers unmatched reliability and smooth driving experience.
| Manufacturer | Yukon Gear & Axle |
| Brand | Red Line |
| Product Dimensions | 22.86 x 10.16 x 10.16 cm; 771.11 g |
| Item model number | 50304 |
| Manufacturer part number | 50304 |
| OEM Part Number | 50304 |
| Item Weight | 771 g |
| Viscosity | 75W-90 |
D**Y
Not the cheapest, but I can feel the difference
Recently used this to replace the transmission and diff oil in my Mk1 Mazda MX5, and I'm very impressed with it.I've had a bit of a notchy change from first to second for as long as I've had the car, especially when cold. While it hasn't disappeared completely, it's much better now with this new transmission oil.Worth the extra cost in my opinion
T**D
Jeep Transmission
I used this in my 2000 Jeep Wrangler 4 Liter when I did a full oil change. It sounds quieter with less whine and the shift appears slicker. I'll try and keep note over the next 3000 miles.
R**O
For Mazda MX5 gearbox
Did a bit of research on the tinernet and folks were saying this this transformed thier gear changing. Mine was stiff and nochy until renewing oil with Red Line MT-90, now gear changing is slick even in the cold weather.
K**G
Recommend
Bought this for my RX8 as recommended by the forum for gearbox
B**N
red line mt 90 gear box oil
i bought red line mt 90 gear box oil for my toyota mr2 mk3 roadster.it has made the gear box alot smother i am very imprest with the oil.
B**K
Five Stars
Exactly what we wanted, company helpful
C**R
Great oil
Bought this for my Lotus Elise, as it's recommended by the vast majority of owners. Great oil, as expected, but due to being imported from the USA, it is very expensive.
D**N
Five Stars
Made 2nd gear shift easier.
Trustpilot
2 weeks ago
3 weeks ago
