Best Transmission Additive For Sticking Solenoids

#1 · Best Overall

1. Trans Tune Fluid Treatment

• Container Type: Can
• Form: Liquid

Best for: Solenoid and valve-body cleaning.

Why it ranks #1: Its listed feature specifically says it cleans and lubricates solenoids, shift actuators, and valve bodies; the 16-ounce three-pack suits repeated treatment needs.

Trans Tune specifically names solenoids, shift actuators, and valve bodies as cleaning and lubrication targets, making it the most directly focused listing here for sticking-solenoid concerns. Its fluid-system treatment is also described as dissolving and liquefying harmful gum and varnish buildup, connecting cleaning action to smoother system operation.

The listed action on valve bodies, shift actuators, and solenoids gives buyers a direct component-focused reason to consider this treatment. Its ability to dissolve gum and varnish supports the stated cleaning purpose, while the description says it helps fluid systems work smoother and last longer. Compatibility is listed for most automatic transmission fluids, including conventional and synthetic fluids, and the description also names hydraulics and power-steering systems. The listing is a three-pack of 16-ounce cans.

Skip it if you need compatibility explicitly stated for every ATF; Bar's Leaks 1415 lists automatic, manual, CVT, and DCT use.

This is a direct fit for buyers focused on cleaning and lubricating sticking solenoids, shift actuators, or valve bodies. Its description covers most ATFs and additional fluid systems, so check that its stated compatibility matches your application.

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

#2 · Anti-Stick Focus

2. XADO EX120 Transmission Fix

• Weight: 10 g
• Container Type: Syringe
• Form: Liquid

Best for: CVT and gearbox anti-stick treatment.

Why it ranks #2: Its title specifically claims reduced sticking, and it is listed as universal for automatic, CVT, Tiptronic, manumatic, and semi-automatic transmissions.

Compatibility with automatic, CVT, Tiptronic, Manumatic, and semi-automatic transmissions is the defining advantage of XADO EX120. Its anti-friction treatment targets sticking, shudder, and slipping across several gearbox types, making it relevant to owners who need a broadly compatible treatment rather than one specified only for conventional automatics.

The liquid treatment comes in a syringe, a format that supports targeted dispensing, and its listed transmission-fluid compatibility covers the gearbox types named by XADO. The product claims to restore metal parts, address surface defects, and provide a durable protective coating against future wear; XADO specifies protection for 60,000 miles. It also targets heat, noise, vibration, shudder, and slipping, though the supplied facts do not establish a solenoid-specific repair.

Skip it if you want an explicitly listed solenoid-cleaning treatment; Trans Tune Fluid System Treatment names solenoids and valve bodies.

This fits drivers seeking an anti-friction treatment across the listed automatic and CVT-related gearbox types, especially where shudder or slipping is a concern. It is not specifically presented as a solenoid-cleaning product.

Listed on Amazon as: XADO EX120 Automatic Transmission Fix – Treatment for CVT & Other Gearbox Types | ATF Additive & Protectant – Reduces Sticking, Shudder and Slipping

#3 · Broad Fluid Coverage

3. Hot Shot Shift Restore

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

Best for: Automatic and CVT shift smoothing.

Why it ranks #3: The product is described for automatic and CVT transmissions and reduces friction and metal-to-metal contact, though its listed facts do not name solenoids.

Shift Restore addresses both automatic and CVT transmissions, with friction reduction intended to smooth gear changes and limit metal-to-metal contact. Its 16-ounce bottle is a larger-volume option for drivers treating transmission operation more broadly, rather than selecting a small, focused torque-converter shudder treatment.

The formula reduces the coefficient of friction and minimizes metal-to-metal contact, linking its stated mechanism to smoother gear changes. It also claims to reduce operating temperatures, which gives buyers a temperature-related benefit alongside shift feel. Compatibility is stated for all automatic and CVT transmissions, making it relevant beyond conventional automatics. The supplied description mentions varnish and transmission-fluid functions, but does not specify solenoid cleaning or a solenoid-specific fix.

Skip it if you need named solenoid cleaning; Trans Tune Fluid System Treatment specifically lists solenoids and valve bodies.

Shift Restore suits drivers seeking smoother shifts and friction reduction in an automatic or CVT transmission, with temperature reduction also claimed. Look elsewhere if the priority is an explicitly identified solenoid or valve-body cleaning action.

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 treatment.

Why it ranks #4: Its additives are described as reducing rough shifting and friction, making it a broader transmission treatment rather than a targeted solenoid cleaner.

Rislone combines stop-slip claims with leak repair in a high-mileage transmission treatment, addressing more than one common symptom in a single formula. Its listed coverage includes front-wheel, rear-wheel, and all-wheel-drive vehicles, while the product also targets rough shifting, hesitation, noise, shudder, and chatter.

Performance additives are said to restore bands and clutches, connecting the stop-slip claim with reduced hesitation and rough shifting. The formula also renews and stabilizes automatic transmission fluid to reduce noise, shudder, and chatter, making it relevant when several symptoms overlap. Rislone identifies it as preventative maintenance and says it works with front-wheel, rear-wheel, and all-wheel-drive applications. The supplied facts do not specify CVT compatibility or a solenoid-cleaning function.

Skip it if you need named CVT coverage; XADO EX120 explicitly lists CVT compatibility.

This is aimed at high-mileage automatic transmissions with slipping, rough shifts, noise, or shudder, including listed front-, rear-, and all-wheel-drive applications. Choose a different product if explicit CVT coverage or solenoid cleaning is essential.

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

#5 · No-Drain Addition

5. Lucas Transmission Fix

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

Best for: No-drain worn-transmission treatment.

Why it ranks #5: The non-solvent liquid can be added to existing fluid without draining, but its stated focus is slipping, hesitation, rough shifts, and seal leaks.

Lucas Transmission Fix can be added to existing fluid without draining any out, a practical feature for owners who want a treatment step without first replacing the fluid. Its non-solvent formula targets slip, hesitation, rough shifting, and seal leaks in worn transmissions, with preventive use also listed.

The no-drain addition method can simplify use when retaining the existing fluid is the goal, while the non-solvent formulation distinguishes the product's approach. Lucas says it lowers operating temperatures and stops foaming, addressing operating conditions alongside its claims to stop slip, hesitation, and rough shifting. The product is also described for preventative maintenance and light-duty manual transmissions to increase shifting ease. The supplied facts do not identify CVT compatibility or solenoid cleaning.

Skip it if you need explicitly listed CVT compatibility; XADO EX120 names CVT among its supported gearbox types.

Lucas suits owners of worn transmissions seeking a no-drain additive for shifting problems, foaming, or seal leaks, and it also lists preventive use. Its supplied facts do not establish CVT compatibility or a solenoid-specific cleaning action.

Listed on Amazon as: Lucas Transmission Fix

#6 · Multi-Type Compatibility

6. Bar’s Leaks Transmission Fix

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

Best for: Broad-gearbox seal and shift treatment.

Why it ranks #6: Its verified description lists automatic, CVT, and DCT compatibility, but the main stated benefits concern leaks, worn bands, slipping, and rough shifting.

Bar’s Leaks 1415 lists compatibility across automatic, manual, CVT, and DCT transmissions, giving it unusually broad stated gearbox coverage. Alongside that range, its synthetic-blend formula targets seal leaks, slipping, jerking, hard shifting, and shudder, making it a multi-symptom option rather than a narrow solenoid treatment.

The synthetic-blend treatment addresses seals, metal surfaces, bands, and clutch plates, linking its stated component coverage to leak control and shift performance. Seal conditioning is intended to stop current leaks and prevent future ones, while performance additives renew worn bands and control fluid degradation caused by high temperatures. The listed compatibility spans automatic, manual, CVT, and DCT transmissions. These broad claims do not specifically identify solenoid cleaning as an action.

Skip it if you need explicit solenoid cleaning; Trans Tune Fluid System Treatment names solenoids, valve bodies, and shift actuators.

This fits drivers seeking broad gearbox compatibility alongside seal conditioning and shift-symptom treatment. It covers several transmission types, but buyers focused specifically on sticking solenoids should note that its supplied claims do not name solenoid cleaning.

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

#7

7. Liqui Moly ATF Additive

• Weight: 0.25 kg
• Container Type: Tube
• Form: Liquid

Best for: Seal care and shift-noise treatment.

Why it ranks #7: It is described as cleaning and protecting and damping shifts, but its specific claims emphasize seals, leaks, noise, and wear rather than solenoid sticking.

Liqui Moly ATF Additive focuses on caring for rubber and plastic seals in transmissions and power-steering systems, making seal condition central to its use case. It also claims to damp shifting operations and reduce noise, providing a shift-refinement benefit alongside its stated leak-prevention and wear-protection aims.

The seal-care formula is intended to prevent or remedy leaks associated with hardened or brittle seals, which gives it a specific role when seal condition is a concern. Liqui Moly also says it cleans and protects, damps shifting operations, reduces noise, and protects against wear. Its stated use spans transmissions and power-steering systems, so it may interest buyers maintaining either system. The supplied details do not specify CVT compatibility or solenoid cleaning.

Skip it if you need named solenoid cleaning; Trans Tune Fluid System Treatment lists solenoids as a target.

This suits owners prioritizing seal care, leak prevention, reduced shifting noise, or power-steering-system maintenance. It is not presented as a solenoid-cleaning treatment, and its supplied information does not list specific transmission subtypes.

Listed on Amazon as: Liqui Moly ATF Additive | 250 ml | Oil additive | SKU: 5135

#8

8. Lubegard Instant Shudder Fix

• Weight: 2.08 oz

Best for: Torque-converter shudder treatment.

Why it ranks #8: The two-ounce tube is compatible with conventional or synthetic ATF, but the concentrated friction modifier targets torque-converter shudder, not solenoid deposits.

A concentrated friction-modifier formula targets torque-converter shudder, giving drivers a focused option for that specific transmission symptom rather than a broad fluid-system treatment. Lubegard says the additive is compatible with conventional and synthetic automatic transmission fluids, so it can suit either fluid type when shudder is the concern.

The uniquely engineered 2-ounce application tube supports a compact, targeted treatment, while the five-times-concentrated synthetic and synthetic-ester friction modifiers focus on shudder control. Lubegard also states that the formula provides four times less wear than regular ATF, adding a wear-related benefit alongside its stated ability to eliminate torque-converter shudder. Its compatibility is specified for conventional and synthetic automatic transmission fluids; the supplied facts do not identify CVT or manual-transmission compatibility.

Skip it if you need a treatment explicitly listed for CVT use; XADO EX120 names CVT compatibility.

This suits drivers seeking a compact, targeted additive for torque-converter shudder in a conventional or synthetic ATF system. Choose another option if your transmission requires explicitly stated CVT compatibility or a broader range of fluid-system treatment.

Listed on Amazon as: Lubegard 19610 Instant Shudder Fix

#9

9. Lubegard Shudder Fixx 2-Pack

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

Best for: Two-pack shudder-fix supply.

Why it ranks #9: This two-pack shares the shudder-fix focus and synthetic material listing, with no supplied claim that it cleans or frees sticking solenoids.

The two-pack presentation is the clearest distinguishing feature of this Lubegard listing, providing two units of the named 2-ounce Dr. Tranny Instant Shudder Fixx. It is a straightforward option for buyers who specifically want this product in a multi-unit listing, though the supplied facts do not detail its formula or compatibility.

The title identifies Dr. Tranny Instant Shudder Fixx and specifies a 2-ounce size in a two-pack, so buyers can distinguish this listing from a single-unit presentation. Its specifications identify a synthetic liquid in a bottle, which describes the treatment form but not its application instructions. The supplied product-specific information does not independently list fluid compatibility, target symptoms, or a solenoid-cleaning action, so those capabilities should not be assumed from the title alone.

Skip it if you need explicit compatibility details; Lubegard 19610 lists conventional and synthetic automatic transmission fluids.

This listing suits buyers seeking the named Dr. Tranny Instant Shudder Fixx in a two-pack. Because the supplied facts do not specify compatibility or detailed performance claims, it is a less informative choice when those details drive the decision.

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

#10

10. ATP Instant Shudder Fix

• Weight: 1.6 oz

Best for: Focused torque-converter shudder fix.

Why it ranks #10: Its concentrated synthetic friction modifier is designed to stop torque-converter shudder, making it the least aligned option for solenoid cleaning.

ATP AT-222 is a highly concentrated synthetic friction modifier specifically described as a quick fix for torque-converter shudder. That focused purpose suits buyers addressing shudder rather than seeking a broad transmission additive with stated heat, wear, or fluid-life enhancements.

The concentrated friction-modifier formula directly targets torque-converter shudder, keeping the product's stated role narrow and clear. ATP distinguishes it from AT-202 by noting that AT-222 does not provide fluid enhancements for reducing heat and wear or extending fluid life. The 2-ounce product name also signals a compact treatment format. The supplied facts do not identify CVT compatibility, solenoid cleaning, or broader transmission-maintenance benefits beyond its shudder-focused use.

Skip it if you need heat and fluid-life enhancements; Hot Shot's Secret Shift Restore claims to reduce operating temperatures.

ATP AT-222 fits buyers seeking a focused treatment for torque-converter shudder. Its stated role does not include heat reduction, wear reduction, or longer fluid life, so it is not the broad maintenance choice for those needs.

Listed on Amazon as: ATP AT-222 Automatic Transmission Instant Shudder Fix – 2 oz.