Updated April 11, 2018 by Christopher Thomas

The 10 Best Transmission Additives

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Best High-End
Best Mid-Range
Best Inexpensive

We spent 28 hours on research, videography, and editing, to review the top options for this wiki. Transmission health is crucial to a working vehicle, but sometimes a complete flush can stir up small particles and endanger the finely-machined components. If your gearbox starts to whine, hesitate, or make clunking noises, or if you often tow heavy loads using a high-mileage drivetrain, one of these additives can protect and renew your machine for the long haul. When users buy our independently chosen editorial picks, we may earn commissions to support our work. Skip to the best transmission additive on Amazon.

10. Dr. Tranny's Kooler Kleen

9. Dr. Tranny Instant Shudder Fixx

8. Sea Foam Trans Tune

7. ATP Titanium

6. MolySlip G

5. ATP Re-Seal

4. Justice Brothers Conditioner

3. LubeGuard Platinum

2. Lucas ATF Conditioner

1. Lucas Transmission Fix

Christopher Thomas
Last updated on April 11, 2018 by Christopher Thomas

Building PCs, remodeling, and cooking since he was young, quasi-renowned trumpeter Christopher Thomas traveled the USA performing at and organizing shows from an early age. His work experiences led him to open a catering company, eventually becoming a sous chef in several fine LA restaurants. He enjoys all sorts of barely necessary gadgets, specialty computing, cutting-edge video games, and modern social policy. He has given talks on debunking pseudoscience, the Dunning-Kruger effect, culinary technique, and traveling. After two decades of product and market research, Chris has a keen sense of what people want to know and how to explain it clearly. He delights in parsing complex subjects for anyone who will listen -- because teaching is the best way to ensure that you understand things yourself.

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