Red Line Synthetic MT 90 Manual Transaxle Lubricant
If you’ve owned a VW for more than five minutes, you already know the gearbox has its own personality, especially on cold mornings when it shifts like it just rolled out of bed. That’s where this 75W90 GL-4 gear oil comes in. Think of it as the morning coffee your transmission didn’t know it needed. It gives you smoother, quicker shifts, keeps your brass synchros happy, and skips all the nasty reactive sulfurs found in most GL-5 oils that chew up vintage VW internals. It’s basically the perfect match for the old-school German gearbox attitude, giving you better protection, longer synchro life, and that tight, crisp engagement your shifter used to have back when your Beetle still had its original radio. VW folks love it because it fixes notchy shifting, works great even when it’s cold, and hits the exact viscosity sweet spot your manual transmission expects without overthinking it.
- VW friendly 75W90 GL-4 gear oil for smoother shifting
- Safe for brass synchros, no reactive sulfurs like GL-5 oils
- Eliminates notchy shifts in cold or warm conditions
- Perfect friction balance for older VW manual transmissions
- High performance gear protection and longer synchro life
- Recommended for GL-1, GL-3, and GL-4 applications
- Satisfies 75W, 80W, and SAE 40 weight requirements
Also known under these part numbers: (For reference only)