Buy Red Line 30504 D4 Automatic Transmission Fluid - 1 Quart

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My 2000 Accord had started slipping at a bit over 100,000 miles, especially in 1st and 2nd gear. It ended up triggering the engine warning light. Took it into the dealership and they said the torque converter was going and that I needed to replace the transmission with a rebuilt to the tune of $4,500.

I did some research online and found out that Honda has had many problems with their post year 2000 transmissions in several vehicles, including the Accord. But several people had replaced their transmission fluid with Red Line D4 ATF and also installed an inline Magnefine AFT filter. (Honda's ATF filter is internal to the transmission and is not changeable.) Seeing that many others had good results, I figured the $50-60 for the price of an full ATF change it was worth a try.

Immediately after doing a full fluid replacement (and I mean the very first drive) I noticed a dramatic improvement in the shifting. I almost couldn't not feel the car shift at all anymore and could only tell by the engine noise and tach. I don't recall the transmission every shifting that smoothly. I cleared the engine light/warning code, and have been driving fine ever since. That was over 3,000 miles ago.

I've since done a D&R on my 2008 Odyssey and also noticed that the sifting is much smoother. So glad to have found out that this was a possible solution and avoided the complete transmission replacement. Saved me over $4,000. I'm planning on a D&R on each vehicle each time I do a standard oil change. 2-3 quarts/change is very cheap insurance against replacing a transmission.

I don't review many items, but I'm so pleased with the results of this product, I had to give it kudos.

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hi guys.......toyota uses good fluids from the factory.....when you change to red line......you will notice your tranny running better.....every year i do 10,000 miles.....i have a drain plug on my toyota solara so i drop what comes out of the pan only.... usually 3 quarts.....and i replace it with red line synthetic.....$30 dollars a year and my tranny smells and performs better than new....always pink and a strong odor.....this is the best way to keep your tranny new.....if you dont follow this and wait for the color to change to darker and no odor then your tranny is wearing out sooner than later....i have other things to do with $2000 dollars than replace my tranny....i also use mobil 1 in the oil...there are other quality brands out there that may work as well.....i can speak for RED LINE only....the bomb....i will never use anything else......$30 a year and my car is happy........joey

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I was kinda worried about putting non-honda transmission fluid in my civic. From reading many various honda forums, honda automatics usual don't do well with non-factory tranny fluid. However, several of the members stated that they had good experience using D4 in their civics so I decided to get it a try. After using D4, my tranny immedately started shifting smoother. After about 2000 miles so far, I couldn't be happier, the tranny is performing like when it was new. I'm very happy with this product.

Honest reviews on Red Line 30504 D4 Automatic Transmission Fluid - 1 Quart

The Redline D4 ATF is highly regarded by Honda enthusiasts for their fragile automatic transmissions (at least generation 6/7). The Redline ATF is not readily found in my locale, so Amazon was a good choice, although still expensive. The Redline D4 is held as a quality synthetic and is supposed to be more stable than the Honda Z1 or new DW-1 ATFs. I performed the Honda flush three drain/refill cycles and seemed to notice a more smooth action. This vehicle has a good many miles and hopefully will provide continued reliable service.

Remember: the Honda V6 has a fill port (17mm capscrew) on the drivers side top of transmission, with ATF stamped on the screw head. Four cylinder ATF addition is done through the dip stick port.

Find helpful customer reviews and review ratings for Red Line 30504 D4 Automatic Transmission Fluid - 1 Quart

I am a mechanical engineer and have done all my own maintenance for 40 years. This stuff is the absolute best and the only fluid I use in AT's that require the older Mercon/Dexron III fluid. Also my "go to" hydraulic fluid for power steering systems and floor jacks.

Only negative: It proved to be TOO good for my '95 BMW with Getrag manual transmission. It requires Dexron III, but the shifting started getting a bit notchier with Redline. Went back to cheap petroleum Dexron III ATF and shifting smoothed back out. Manual transmissions have synchronizers which are kind of like clutches and require a bit of drag to work right. When the fluid is too slippery for the design, they don't work as well. Other manual transmissions may be just fine, but a word of caution for mid 90's Getrags.