TenBest

10 Best Transmission Additives

Updated December 2024

Top Choice

LUCAS LUC10009 Transmission fix, 24. Fluid Ounces

LUCAS

9.8

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XADO Revitalizant EX120 Conditioner for Automatic Gearbox & CVT Tiptronic Transmission Oil Treatment

XADO

9.6

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Bar's Leaks 1414 CVT Transmission Fix - 11 oz

Bar's Leaks

9.1

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Hot Shot's Secret HSSTSE32Z Transmission Restore Additive, 32. Fluid Ounces

Hot Shot's Secret

8.8

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Lubegard 67010 CVT Recharge & Protect, 10 fl. oz

Lubegard

8.5

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Lucas Oil 10778 Transmission Oil - 1 Quart

Lucas Oil

8.2

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Lubegard 63010 Platinum Universal ATF Protectant, 10 oz

Lubegard

8.0

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Liqui Moly 20040 ATF Additive

Liqui Moly

7.6

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Bar's Leaks 1400 Transmission Repair - 16 oz

Bar's Leaks

7.4

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Slick 50 41806015 Recharged High Mileage Automatic Transmission and Engine Treatment, 15-Ounce

Slick 50

7.3

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Automatic Transmissions

Transmission Fluids