Redline D6 with Lubrgard Red

[Yukiwari]

Hello everyone,


I drive a Hyundai Elantra MD 2014 with 375,800 km (233,600 miles) on the odometer. I use Red Line D6 ATF in the transmission. Recently, I added 10 ounces of Lubegard Red after draining the same amount of transmission fluid.


The reason I added it is because I’ve been experiencing a whining noise, a slight whistling during gear shifts, and occasional delay in engagement.


The recommended dosage for Lubegard Red is 1 ounce per quart, and since my transmission holds 7.3 liters (~7.7 quarts), I’ve added about 1.3 oz per quart, which is slightly above the recommended ratio.


My questions:

1. Is Lubegard Red incompatible with Red Line D6?
2. Could this overdose damage the transmission? I’ve read some posts here saying additives aren’t needed with high-quality fluids like Red Line.
3. Do I need to do a drain & fill to restore balance or reduce the additive ratio?

Any insights or advice would be appreciated. Thank you!

 

[ripcord]

Yes it is compatible. I have used similar Lubegard Red dosing levels in multiple cars with good results.

 

[Yukiwari]

Thanks again!

Just wondering — how soon did you notice an improvement after adding Lubegard Red? Was it immediate or did it take some time?

 

[Propflux01]

Lubegard works. I used it in my former 2014 Elantra, noticed an improvement in shift quality in about 100-150 miles, this using stock fluid.

 

[Kira]

.......improvement after adding Lubegard Red? Was it immediate or did it take some time?

In my situation (different transmission, no whining or whistling), what I 'felt' was a delay in shifting.
LG's positive effect was immediate.

 

[panthermike]

Won't hurt anything at all! It may be true that it could be "unnecessary" but I add it to any fluid I use; always with improvement.

As mentioned above, usually any effect noticed may take some cycling of the fluid.

 

[ripcord]

I have never used it in attempt to fix anything, but as a preventative thing. My transmission guy recommended it so I've used it, especially in my trucks.

IF you have sticking valve body components due to varnish, it can take a while for the esters to clean them up enough to be noticeable.

 

[Yukiwari]

Thank you for your valuable and informative insights.


I chose to add this combination due to harsh driving conditions. The transmission fluid temperature would reach 97–102°C (207–216°F), with 102°C (216°F) being the peak without Lubegard. At that point, the temperature struggled to decrease, and I was experiencing hesitation between 4th and 5th gear, sometimes with delayed shifts.



After adding Lubegard, the temperature now reaches 100°C (212°F), occasionally 101°C (214°F), but it quickly returns to 100°C or drops further when the load is reduced.


Ambient temperatures here range from 38°C to 48°C (100°F to 118°F), and I regularly drive on highways.


I’ve currently driven 890 km (about 454 miles) on this blend.