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.