Best Transmission Additive For Sticking Solenoids

#1 · Best Overall

1. Trans Tune Fluid System Treatment

• Container Type: Can
• Form: Liquid

Best for: Valve-body and solenoid cleaning.

Why it ranks #1: Its description specifically says it cleans and lubricates valve bodies, shift actuators and solenoids, and dissolves gum and varnish buildup.

Cleaning and lubricating valve bodies, shift actuators, and solenoids is the Trans Tune treatment's stated focus, enabling targeted fluid-system care for those components. Its description says it dissolves and liquefies gum and varnish buildup, and lists use with most automatic transmission fluids, hydraulics, and power steering systems.

The combination of dissolving gum and varnish with cleaning and lubricating valve bodies and solenoids connects the treatment to contamination-related maintenance. Its stated fluid compatibility includes conventional and synthetic fluids, alongside most automatic transmission fluid, hydraulic, and power-steering systems, giving it applications beyond transmission ATF. The product is a 16-ounce liquid supplied as a three-pack, which provides multiple containers. The supplied facts do not give a per-system dosage, so follow the product directions when planning use.

Skip it if you need an additive with listed repair claims for leaks and worn bands; Bar's Leaks 1415 Transmission Fix lists those functions.

Trans Tune suits buyers focused on gum and varnish removal from solenoids, valve bodies, or shift actuators, with listed fluid-system versatility. Its supplied details omit dosage, so check directions before deciding how much to use.

Listed on Amazon as: Trans Tune Fluid System Treatment, TT16, 16 oz (3 Pack)

#2 · Solenoid Cleaner

2. MotorPower Care Transmission Flush

• Weight: 13.7 oz

Best for: Solenoid-focused flush cleaner.

Why it ranks #2: Its title explicitly mentions cleaning solenoids, and its listed features say it dissolves contamination and lubricates while working in the system.

Solenoid cleaning is named directly in MotorPower Care's title, enabling buyers to find a product whose stated purpose addresses transmission contamination and solenoid concerns. The cleaner is listed for automatic and CVT transmissions, and its features include dissolving contamination while lubricating as it works in the system.

The combination of contamination-dissolving action and lubrication while working in the system gives the product two stated functions relevant to a cleaning-focused maintenance step. Its listed fit includes all vehicles with automatic transmission and CVT, providing clear scope across those transmission types. The product is presented as a transmission flush cleaner intended to stop slipping and hesitation as well as clean solenoids. The supplied facts do not give a treatment volume or a detailed procedure, so follow the product instructions for use.

Skip it if you need a stated treatment volume before choosing; Rislone High Mileage Transmission Stop Slip lists a 16.9-ounce size.

MotorPower Care suits owners seeking an automatic- or CVT-transmission flush cleaner with an explicit solenoid-cleaning claim. Its listing does not provide a treatment volume or detailed procedure, so those details matter when planning the job.

Listed on Amazon as: MotorPower Care Automatic Transmission Flush Cleaner Stop Slipping and Hesitation Clean solenoids, Certified Product

#3 · CVT-Compatible Option

3. Hot Shot's Secret Shift Restore

• Weight: 16 oz
• Container Type: Bottle
• Form: Liquid

Best for: Temperature and shift-feel support.

Why it ranks #3: The listed features say it is for automatic and CVT transmissions, reduces friction and smooths gear changes, though they do not specifically claim solenoid cleaning.

Hot Shot's Secret Shift Restore combines reduced operating temperatures with lower friction, enabling a buyer to target heat and shift feel in one liquid additive. The listing says it works in automatic and CVT transmissions and smooths gear changes, giving it a broader stated application than automatic-only formulas.

The product's friction-reduction claim is paired with minimizing metal-to-metal contact, which the listing connects to smoother gear changes. Its stated temperature reduction adds a heat-management aim, relevant to buyers who want more than a shift-feel claim alone. Compatibility is explicitly listed for automatic and CVT transmissions, supporting those applications. The product is supplied as a 16-ounce bottle of liquid; the information does not describe cleaning or unclogging solenoids, so the fit is symptom support rather than solenoid maintenance.

Skip it if you need an additive whose listed function includes cleaning solenoids; MotorPower Care Automatic Transmission Flush Cleaner states that use.

Choose Shift Restore when temperature reduction, friction control, and smoother changes are priorities in an automatic or CVT transmission. It is not presented as a solenoid-cleaning product, a relevant boundary for buyers targeting contamination.

Listed on Amazon as: Hot Shot's Secret Shift Restore Transmission Additive, 16 oz

#4

4. Rislone High Mileage Stop Slip

• Weight: 1.06 lb

Best for: High-mileage slip and shift care.

Why it ranks #4: Its 16.9-ounce formula targets hesitation, rough shifting, noise and shudder, making it a broad symptom treatment rather than a solenoid-specific cleaner.

A high-mileage formula combining slip treatment with leak repair gives owners one additive aimed at worn transmission symptoms and seal concerns. Rislone says its performance additives restore bands and clutches, while its ATF treatment reduces noise, shudder, and chatter for automatic transmissions.

Restoring bands and clutches is intended to address slipping, hesitation, and rough shifts, making this a symptom-focused option for a poorly maintained transmission. The formula also renews and stabilizes ATF to reduce noise, shudder, and chatter. Rislone lists use across front-wheel, rear-wheel, and all-wheel-drive applications, supporting a broad drivetrain fit. Its high-mileage positioning and leak-repair claim suit owners looking for several forms of transmission support, rather than a product described specifically as a solenoid cleaner.

Skip it if you want a treatment explicitly described as cleaning solenoids; MotorPower Care Automatic Transmission Flush Cleaner names solenoid cleaning.

Rislone fits high-mileage owners managing slip, harsh shifts, noise, or leak concerns across listed drivetrain layouts. Its supplied details do not name fluid types or promise solenoid cleaning, so those requirements call for a different match.

Listed on Amazon as: Rislone High Mileage Transmission Stop Slip with Leak Repair, 16.9 oz

#5 · Broadest Fluid Fit

5. Bar's Leaks Transmission Fix

• Weight: 11.5 oz
• Container Type: Bottle
• Form: Liquid

Best for: Broad-transmission leak and shift care.

Why it ranks #5: Its synthetic-blend formula is listed for automatic, manual, CVT and DCT transmissions, but the product focuses on leaks, slipping and shift feel.

Bar's Leaks Trans Fix is listed for automatic, manual, CVT, and DCT transmissions, enabling buyers with different transmission types to consider one synthetic-blend treatment. Its seal conditioner targets current and future leaks, while performance additives address worn bands, noise, slipping, and harsh shifts.

The seal-conditioning claim connects protection and reconditioning of seals with stopping current and preventing future leaks. Separately, the additive renews worn bands and controls fluid degradation caused by high temperatures, supporting shift-feel and noise goals. The broad stated compatibility covers regular automatic, manual, CVT, and DCT transmissions, including listed drivetrain configurations. That breadth makes it a flexible maintenance option, but the supplied facts do not specifically describe solenoid cleaning, so choose it for the stated leak, wear, and shifting support.

Skip it if you need an explicit solenoid-cleaning claim; MotorPower Care Automatic Transmission Flush Cleaner lists cleaning solenoids directly.

Bar's Leaks Trans Fix fits buyers seeking seal, band, and shift support across several transmission types. Its broad compatibility is useful, but a shopper specifically targeting solenoid contamination should prioritize a cleaner that names that function.

Listed on Amazon as: Bar's Leaks 1415 Transmission Fix, 11.5oz, Pack of 1

#6

6. Lucas Transmission Fix

• Weight: 1.6 lb
• Container Type: Bottle
• Form: Liquid

Best for: No-drain worn-transmission treatment.

Why it ranks #6: Its non-solvent formula addresses slip, hesitation and rough shifting and can be added without draining fluid, but no solenoid-cleaning claim is listed.

Lucas Transmission Fix can be added to existing fluid without draining any out, enabling a simpler addition for owners addressing slip, hesitation, and rough shifting. Its non-solvent formula also lowers operating temperatures and stops foaming, while the description says it addresses most seal leaks.

The no-drain addition method means the existing fluid can remain in place during application, an especially practical detail for routine maintenance. Lucas identifies the formula as non-solvent and says it stops foaming and lowers operating temperatures. The product description also targets slip, hesitation, rough shifting, and most seal leaks in worn transmissions, with preventative use and light-duty manual-transmission use noted. Those claims make it broader than a dedicated solenoid-cleaning treatment, and it should be selected for the listed symptoms and applications.

Skip it if you need an explicit solenoid-cleaning claim; MotorPower Care Automatic Transmission Flush Cleaner names cleaning solenoids among its uses.

Lucas Transmission Fix suits owners seeking no-drain support for a worn transmission with shifting symptoms or seal concerns. Its description also includes light-duty manual use, but it does not specifically claim solenoid cleaning.

Listed on Amazon as: Lucas Transmission Fix

#7

7. Bar's Leaks High Mileage Repair-It

• Weight: 1.1 lb
• Container Type: Bottle
• Form: Liquid

Best for: High-mileage automatic repair support.

Why it ranks #7: The 16.9-ounce treatment targets rough shifting, slip and shudder; its compatibility notes exclude CVT transmissions and do not mention solenoid cleaning.

A high-mileage formula that treats slip, rough shifting, and shudder gives Bar's Leaks Repair-It a broad symptom focus for aging automatic transmissions. The product also acts as a fluid stabilizer when topping off or changing fluid, while its seal conditioners target leaks and transmission-fluid loss.

The fluid-stabilizer feature supports use either when topping off existing fluid or when changing it, giving owners two listed maintenance points for addition. Its high-mileage formula targets friction, temperature control, slipping, shudder, chatter, and whining, while seal conditioners address leaks. The product is stated to work with all types of transmission fluid in regular automatic transmissions, but the supplied facts explicitly exclude CVTs. One bottle treats eight to twelve quarts, helping buyers assess suitability for that fluid capacity.

Skip it if you have a CVT; Bar's Leaks 1415 Transmission Fix is listed for CVT use, unlike this product.

Repair-It suits high-mileage regular automatic transmissions with shifting, shudder, or leak concerns, especially when topping off or changing fluid. Do not choose it for a CVT; that explicit compatibility boundary matters.

Listed on Amazon as: Bar's Leaks High Mileage Transmission Repair-It, 16.9 Fl Oz

#8

8. Lucas Transmission Fix 12 oz

• Weight: 1.5 lb
• Container Type: Bottle
• Form: Liquid

Best for: No-drain shifting and leak support.

Why it ranks #8: This 12-ounce Lucas treatment targets slips, hesitation and rough shifting and can help with leaks, but its listed features do not address solenoids.

The no-drain addition method is the clearest practical advantage of this Lucas Oil treatment, letting owners add it to existing fluid without first removing any. Its non-solvent formula is stated to reduce operating temperatures and stop foaming while addressing slips, hesitation, rough shifts, and most seal leaks.

Lucas describes this product for worn transmissions with slipping, hesitation, and rough shifting, while also stating that it helps eliminate most seal leaks. Adding it without draining fluid can simplify the maintenance step for owners topping up an existing system. The formula also claims lower operating temperatures and reduced foaming. Its listed purpose spans easy shifting and preventative maintenance, but the supplied facts do not name solenoid cleaning, making symptom and seal support the better-supported reason to choose it.

Skip it if you want a treatment explicitly labeled for solenoid cleaning; MotorPower Care Automatic Transmission Flush Cleaner lists that function.

This Lucas treatment fits owners seeking a no-drain option for shifting complaints, foaming, or seal leaks in a worn transmission. The listing also mentions preventative maintenance, but does not identify solenoid cleaning as a benefit.

Listed on Amazon as: Lucas Oil Transmission Fix,Bottle,Red,12 oz. 10009 – 1 Each

#9

9. Lubegard Instant Shudder Fix

• Weight: 2.08 oz

Best for: Torque converter shudder treatment.

Why it ranks #9: The compact 2-ounce treatment is compatible with conventional or synthetic ATF and targets torque converter shudder, not sticking solenoids.

A concentrated friction-modifier formula targets torque-converter shudder, giving drivers with that specific symptom a focused treatment rather than a broad transmission-repair claim. Lubegard says the product instantly eliminates shudder and provides four times less wear than regular ATF, with compatibility for conventional and synthetic automatic transmission fluids.

The uniquely engineered two-ounce application tube supports a compact, direct-use format, while the concentrated blend of synthetic friction modifiers and synthetic esters delivers five-times concentration. Compatibility with conventional or synthetic ATF gives owners flexibility across those fluid types. Its stated focus is torque-converter shudder, not a general cleaning treatment for sticking solenoids, so it best fits buyers seeking that particular symptom remedy and should not be mistaken for a full transmission overhaul.

Skip it if you need an additive specifically described as cleaning solenoids; MotorPower Care Automatic Transmission Flush Cleaner names that use directly.

Choose Lubegard for torque-converter shudder when a concentrated, small-format additive compatible with conventional or synthetic ATF suits your maintenance plan. Its listed purpose is narrow; buyers seeking a solenoid-cleaning claim should look elsewhere.

Listed on Amazon as: Lubegard 19610 Instant Shudder Fix

#10

10. Lubegard Shudder Fixx 2 Pack

• Weight: 50 g
• Container Type: Bottle
• Form: Liquid

Best for: Two-bottle shudder-fix supply.

Why it ranks #10: This two-pack is identified as Instant Shudder Fixx, a shudder-focused treatment; the supplied specifications do not establish solenoid cleaning or compatibility details.

The two-pack format supplies two bottles of Lubegard Dr. Tranny Instant Shudder Fixx, enabling buyers to keep a second application on hand. The listing identifies a liquid synthetic product in bottle containers, but provides no detailed symptom claims or compatibility guidance for this particular listing.

For shoppers who specifically want a two-bottle supply, the pack format offers a spare without requiring a separate purchase decision. Its liquid form and bottle container identify how the product is presented, while the Lubegard name and Instant Shudder Fixx title establish its shudder-treatment positioning. This listing does not specify a dosage, fluid compatibility, or additional performance details, so buyers should rely on the product directions rather than infer an application amount from the pack count.

Skip it if you need stated compatibility with conventional and synthetic ATF; Lubegard 19610 Instant Shudder Fixx lists both fluid types.

This pack suits a Lubegard shopper who values having two liquid bottles available for shudder treatment. Since the listing omits dosage and compatibility specifics, it is a weaker fit when those details are essential before purchase.

Listed on Amazon as: Lubegard 19610 Dr. Tranny Instant Shudder Fixx 2 Ounce 2 Pack