Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
Welcome Offer : Use Code WELCOME5 for 5% OFF!
Free Shipping on Most USA Orders
⚠️ California Proposition 65 Warning : Some products sold on this website may expose you to chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm.
For more information, visit www.P65Warnings.ca.gov.
Red Lines D4 Automatic Transmission Fluid (ATF) is Red Lines most popular and versatile ATF. D4 is suitable for use where Dexron III, Dexron II, or Mercon fluids are recommended. D4 ATF is a fully-synthetic product designed to satisfy the improved low-temperature requirements which will be in the new Dexron IV specification, and the improved shear-stability requirements which will be part of the new Mercon specifications. D4 ATF also provides a GL-4 level of gear protection, making it a superior product for transmissions and transaxles like the Corvettes T-56. The balanced frictional characteristics provide smooth and consistent shifts for extended drain intervals. The superior stability compared to petroleum ATFs allows high-temperature operation without varnishing valves and clutches which leads to transmission failure. Its stability allows high-temperature operation without varnishing valves and clutches. Also provides improved shifting in cold weather. Red Line Synthetic Automatic Transmission Fluids are designed to provide improved thermal stability. The products identified as Synthetic ATF, Synthetic D4 ATF, and Synthetic C+ ATF have better thermal stability and lower volatility characteristics than a petroleum ATF and provides a much lower viscosity at lower temperatures, providing much quicker shifting in cold weather.
The Red Line ATF works as advertised, but I had some trouble with the delivery. It took a bit longer than expected to arrive. Overall, the product itself is great for my truck's transmission.
A
Amina Al-Farsi
Best synthetic fluid on the market
After using several different ATFs, I can confidently say Red Line D4 is at the top. It improved my car's performance significantly. The 1-quart size is perfect for top-ups without wasting any. Love this product!
C
Carlos Mendez
Smooth shifting with this fluid
I recently switched to Red Line D4 for my transmission and I can feel the difference! The shifts are so much smoother, and it seems to hold up well even in hot weather. Definitely worth the buy!
T
Tomiko Fujikawa
Great value pack!
I bought the 12-pack of this synthetic ATF for my fleet of vehicles. It's a fantastic deal and I appreciate the quality of Red Line. My transmissions are running cleaner and quieter now. No complaints!
E
Ethan Johnson
Not as expected, a bit disappointed
I had high hopes for the Red Line D4 ATF based on reviews, but it didn't work well with my older vehicle. The shifts feel a bit rougher than with my previous fluid. Might just not be compatible, but I'm bummed.
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FAQs
Have a question ? We are here to help.
Is the shipping free?
Yes, we offer free standard shipping on all orders within the United States.
When will I receive my item?
Domestic orders typically arrive within 3-5 business days. Delivery times are estimated and may vary depending on your location, weather conditions, or other unforeseen factors.
Can I change or return my item?
We hope you love your purchase, but if you need to make a change or return your item, we’ve got you covered! You can initiate a return or exchange within 30 days of receiving your order. Please ensure the product is in its original condition and packaging. For more information on our return policy, please visit our Returns & Exchanges page.
