Customer Reviews 3 item(s)
- Works fine, but Red Line recommends, on their website, is MT-90 75W90 GL-4 gear oil.
Miata gear boxes were designed before synthetics were commonly used in gear boxes. Our boxes have large clearances, and Red Line currently recommends a heavier oil than this for our boxes. The oil that Red Line recommends, on their website, is MT-90 75W90 GL-4 gear oil. This said, many of us have used MTL for years, and have been fine with it.
- Wouldn’t recommend it
The combination of this and the shockproof only lasted me 5 months. Now I gotta change the fluid because getting into gears is a little rough
Tried this alone and in combination with Redline's Shockproof Gear Oil, and both resulted in better gearbox action than stock fluid (only slightly) but neither compare to Motorcraft Manual transmission fluid. Talking to other Miata owners and searching the forums, you'll find the Motorcraft fluid is actually the favorite of Miata owners and for good reason! It noticeably improved the shifting action of my 200,000+ mile transmission.