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⚙️ Shift smarter, not harder — the pro’s choice for flawless transmission performance!
Red Line 30504 D4 Synthetic ATF delivers unmatched cold-weather shiftability and robust gear protection with a synthetic formula compatible across multiple OEM specs. Its advanced thermal stability prevents varnish buildup, extending transmission life and ensuring smooth, reliable performance in both automatic and manual transmissions.






| ASIN | B000CPI5XM |
| Best Sellers Rank | #41,353 in Automotive ( See Top 100 in Automotive ) #49 in Automotive Transmission Fluids |
| Brand | Red Line |
| Brand Name | Red Line |
| Container Type | Bottle |
| Customer Reviews | 4.8 out of 5 stars 1,041 Reviews |
| Global Trade Identification Number | 00083522305044 |
| Item Form | Oil |
| Item Weight | 771 g |
| Item weight | 771 g |
| Liquid Volume | 0.95 Liters |
| Liquid volume | 0.95 Liters |
| Manufacturer | Red Line |
| Material | Synthetic |
| Model Number | RED30504 |
| Number of Items | 1 |
| Package information | Bottle |
| Part Interchange Info | 30504 |
| Part Number | 30504 |
| Recommended Uses For Product | For use in automatic and manual transmissions, power steering, racing transmissions |
| Recommended uses for product | For use in automatic and manual transmissions, power steering, racing transmissions |
| SAE J300 Viscosity Grade | 5W |
| Specific Uses For Product | Automatic and Manual Transmissions, Power Steering |
| UPC | 083522305044 |
| Unit Count | 1 Count |
| Viscosity | 5w |
L**P
Excellent produit !
Très bon produit, j'utilise ce produit exclusivement pour ma Corvette C6 depuis longtemps !
G**S
Smooth Shifting, Even on Cold Starts
Great transmission fluid noticed an immediate difference after the change. My 6-speed shifts are much smoother, especially from 1st to 2nd and 2nd to 3rd. Even on cold starts, when the transmission used to feel a bit notchy, now it shifts like butter.
G**Y
Good
Matches 955 Cayenne transfer case fluid specs.
A**W
Super
Ich bin begeistert was der getriebeöl redline d4 atf leistet. Die Schalt Vorgänge sind deutlich weicher und sanfter geworden demnächst werden ich komplette öl Wechsel vornehmen. Tolle Arbeit an die amerikanische öl Industrie
F**L
Four Stars
Great for my Hurth gearboxes on my boat.
Trustpilot
1 month ago
3 weeks ago