Top 9 Manual Transmission Fluid Additive – Transmission Fluid Additives

As an Amazon Associate I earn from qualifying purchases.



Stick Shift Gear Boxes, Transfer Cases & Differentials Syringe 8 ml, Friction Modifier & Anti Hard Shifting Additive, XADO EX120 Revitalizant for Manual Transmission

XADO #ad - Works with manual & direct shift, Robotized Gear Boxes, Transfer Cases & Differentials. Repairs scratches and Damaged Working Surfaces - Improves Operation Of Synchronizers. If there is a heavy transmission fluid Leakage - Transmission Will Still Work Up To 600 Miles. Increases gear contact Efficiency - Resulting in Better Gear Shifting Accuracy. Stops slipping and Hard Shifting. Reduces noise and Vibrations.
BrandXADO #ad
ManufacturerXADO Chemical Group #ad
Height2.8 Inches
Length9.49 Inches
Weight0.01 Pounds
Width1.61 Inches
Part NumberXA 10030

2. zMAX


Transmission Formula, for Automatic and Manual Transmissions, Keeps Seals Supple, zMAX 51-306, Lubricates Metal and Gears, Reduces Carbon Build-Up, Improves Shifting Performance, 6 oz.

zMAX #ad - Add every time you change your transmission fluid. Protect your vehicle: zmax transmission formula is easy to use! Micro-lubrication soaks into metal surfaces improving lubrication to reduce gear wear and varnish buildup. Economical preventative maintenance: pour into transmission fluid to keep the gears lubricated and in top condition.

Keeps seals supple, preventing leaks and improving shifting. Not for use in CVT transmissions. Brings back smooth shifting gears resulting in an improved response. The eco-friendly formula is industry tested, mechanic trusted and improves the performance and the driving experience. Perfect for both automatic or manual transmissions. Trusted for over 80 years, the uSA made Transmission Formula saves money at the pump and extends the engine life of all your vehicles.

Does not void manufacturer's warranties. Transmission lubricant: cleans varnish for smoother shifting and lubricates bearings, gears, and the hydraulic system. Trusted quality and performance: zmax is proud to be the official Micro-lubricant of Speedway Motorsports. Transmission efficiency: improve performance by adding the formula to your transmission fluid to reduce slippage and rough shifting.
BrandzMAX #ad
ManufacturerzMax #ad
Height5.5 Inches
Length3 Inches
Width3 Inches
Part Number51-306

3. Bar's Leaks


Bar's Leaks 1416 Super Transmission Fix, 16.9 oz.

Bar's Leaks #ad - Stop slipping, rough Shifting, & Seals Fluid Leaks. Renews Worn Bands. Reduces Noise. Bar's leaks super transmission Fix is a synthetic blend treatment for transmission fluid, metal surfaces, seals, bands and clutch plates. Works in all automatic, CVT, Manual, & Dual Clutch Transmissions.
BrandBar's Leaks #ad
ManufacturerBar's Products #ad
Height8.8 Inches
Length3.5 Inches
Weight0.6 Pounds
Width2 Inches
Part Number1416
WarrantySee manufacturer



White, Brown Packaging May Vary , Lucas LUC10009 Transmission Fix 24 oz.

LUCAS #ad - Lucas transmission fix stops slip, hesitation, Rough Shifting In Worn Transmissions And Completely Eliminates Most Seal Leaks. Fit type: Universal. Can be added to existing fluid without draining any out. Improves shifting.
BrandLUCAS #ad
ManufacturerLucas Oil #ad
Height3.35 Inches
Length12 Inches
Weight1.58 Pounds
Width3.35 Inches
Part Number10009

5. Liqui Moly


Liqui Moly 2019 MoS2 Anti-Friction Gear Lubricant, 50 Gram

Liqui Moly #ad - Country of Origin: Germany. Product type: Auto Accessory. Package dimensions: 1. 778 cms l x 2. 794 cms w x 1. 778 cms H. Package Quantity: 1.
BrandLiqui Moly #ad
ManufacturerLiqui Moly #ad
Height0 Inches
Length0 Inches
Weight0.12 Pounds
Width0 Inches
Part Number2019

6. Castrol


1 Gallon, Castrol 03520C TRANSMAX DEX/MERC ATF, Automatic

Castrol #ad - May also be used in power Steering Applications Where Mercon Is Required. Enhanced friction Durability For Smooth Transmission Performance. Meets dexron-iii h requirements And Satisfies Requirements Of Dexron, Dexron-Iii, Iie And Ii. Product type : Auto Accessory.
BrandCastrol #ad
ManufacturerCastrol #ad
Height11.52 Inches
Length4.62 Inches
Width9.5 Inches
Part Number03520

7. Slippery Pete


Slippery Pete Fluid Pump for QUART BOTTLES, Transfer Gear Oil, Transmission and Differential Fluid With This 5cc Hand Pump NOT FOR Red Line Quarts! 1

Slippery Pete #ad - 17 inch long flexible tube for pumping fluids into tight and awkward places. Rigid suction tube that reaches to bottom of STANDARD QUART CONTAINERS. Only quart bottle pump that comes with long and SHORT SUCTION TUBES for Tall and Short Quart Bottles. Easy to understand instructions on back of header card. 100% money back guarantee. Fits securely on standard quart containers, which is about a 1 inch opening will not fit red line quart containers or wide-mouth quart contaINERS, BUT Slippery Pete's Fluid Pump for Gallon Bottles WILL also FIT WIDE MOUTH QUART BOTTLES.
BrandSlippery Pete #ad
ManufacturerSlippery Pete #ad
Part Number573003
Warranty90 days from date of purchase

8. Lubegard


10 oz., Lubegard 60902 Automatic Transmission Fluid Protectant

Lubegard #ad - Eliminates clutch chatter and torque converter shudder; Softens and modifies harsh shifts making them quicker in duration. Extends fluid life / Raises the thermal and oxidative stability of the fluid.

Prevents overheating, reducing elevated operating temperatures up to 40 degrees Farenheit - Optimizes total transmission performance. Only protectant that increases the fluid’s ability to transfer heat / Protects new seals and permanently restores older seals to a like-new condition, without adverse side effects. Eliminates transmission fluid foaming and oxidation and reduces wear throughout the transmission.
BrandLubegard #ad
ManufacturerLubegard #ad
Height1.8 Inches
Length7.4 Inches
Weight0.11 Pounds
Width3 Inches
Part Number60902

9. Lubegard


Lubegard 19610 Dr. Tranny Instant Shudder Fixx 2 Ounce 2 Pack

Lubegard #ad - A concentrated friction modifier formulated specifically for instantly eliminating torque converter lock-up shudder. Voted top product by transmission professionals. The original transmission shudder fix. For use in any automatic transmission fluid not for use in Ford Type F or CVT applications. Provides four times less wear than regular ATF.
BrandLubegard #ad
ManufacturerLubegard #ad
Weight0.28 Pounds
Part Number19610