Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service levels, popularity trends, and more. The rankings reflect our opinion and should be a good starting point for shopping. By purchasing the products we rank, you’ll get the lowest price we found while we may receive a commission at no cost to you, which will help us continue to provide you with value.
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Clean Transmissions of 2025
Save up to 19% off
Best Choice1
CermaCerma Automatic Transmission Treatment - Clean, Revitalize, and Protect Transmission. Restore Smooth Shifting, Stop Slippage
9.9Exceptional
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Powerful technology We scan thousands of products and stores, analyzing reviews to find what matters most to users like you
Careful review Our team ensures quality, value, and fit based on real user feedback
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Value for Money2
ACDelcoACDelco GM Original Equipment 10-9244 (88865618) Dexron VI Full Synthetic Automatic Transmission Fluid - 1 gal
9.7Exceptional
Our Rating
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3
SmilyeezSmilyeez Listing for BG Transmission Service Flush Kit PN K6600 Includes PM 106 Cleaner & PN 310 Conditioner with Pocket Screw Driver (1 Kit)
9.6Exceptional
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4
SmilyeezSmilyeez BG Quick Clean for Transmissions PN 106 with Pocket Screwdriver (1)
9.4Excellent
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5
SmilyeezSmilyeez BG K6610 CVT Transmission Quick Clean Flush PN106 & CVT DCT Plus Fluid Conditioner PN 303 with Pocket Screwdriver (1)
Key specs-
Stability:Improves fluid stability
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Performance:Removes damaging deposits
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Compatibility:CVT, DCT, DSG
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Protection:Prevents deposit formation
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Liquid Volume:N/A
9.1Excellent
Our Rating
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6
Hot Shot's SecretHot Shot's Secret Shift Restore Automatic Transmission Additive 16 fl oz Bottle
19% OffKey specs-
Stability:Smooths out gear changes
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Performance:Reduces operating temperatures
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Compatibility:All automatic & CVT
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Protection:Minimizes metal contact
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Liquid Volume:16 Fluid Ounces
9.0Excellent
Our Rating
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7
Speedway MotorsSpeedway Motors GM TH350/TH400 Flywheel/Flexplate Dust Cover - Fits Chevy Engines - Steel - Black - Includes Stainless Steel Bolts - Keep Your Transmission Clean
8.7Very Good
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8
Speedway MotorsSpeedway Motors GM TH350/TH400 Flywheel/Flexplate Dust Cover - Keep Transmission Clean - Fits Chevy & GM Engines - Black, Chrome Bolts and Washers Included
8.6Very Good
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9
atp automotiveATP Automotive AT-200 Transmission Cooler Flush
8.5Good
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10
zMAXzMAX Transmission Formula 2 Pk - Automatic and Manual Transmission Fluid Additive to Lubricate Metal and Gears - Improves Shifting Performance - 6oz
Key specs-
Stability:Keeps seals supple
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Performance:Improves shifting, reduces wear
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Compatibility:Automatic, manual transmissions
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Protection:Prevents leaks, reduces wear
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Liquid Volume:6 ounces
8.4Good
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