Do you have to flush the transmission to use this,or can l just add this to existing transmission fluid, thanks for the feedback

After 50,000 miles you should change your transmission fluid (and filter unless it's a screen type) if it's still bright red. But If it's very dark red or even worse black then flush the transmission it's money well spent to save your transmission. Keep in mind it will look like red metallic paint that's just part of normal wear. If it's bright red then just drain some transmission fluid to keep it at the proper level. Overfilling an automatic transmission by just a few ounces can cause it to leak. Best of luck to you.

Does this work on a Prius?

I believe it works on any automatic transmission. Call Lucas Oil company to make sure and/or Toyota

he can use on any transmission fluid?

Yes it's compatible with conventional and full synthetic transmission fluids note that this product is not compatible with CVT fluid

do you have to drain any fluid

Check your fluid levels first, always! If it's full, or close, then drain the appropriate amount. 32oz bottle, drain 32ozs. Keep the old fluid just in case if you do a drain & fill on a trans that hasn't been serviced for 10+ years or over 30k-50k miles. That fluid may contain clutch material that's allowing everything to work properly, and fresh fluids can disrupt the fine fluid friction balance needed for an Auto Trans to work correctly.

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Lucas Oil 10441 Automatic Transmission Fluid Conditioner - 20 Ounce

Lucas Oil 10441 Automatic Transmission Fluid Conditioner - 20 Ounce

Product ID: 8217077

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Details

Material
Plastic
Brand
Lucas Oil
Package Information
Bottle
Liquid Volume
1 Fluid Ounces
Item Weight
0.55 Pounds

🔇Reduces noise & shudder

⚙️Improves shifting precision

🛢️Compatible with all ATF fluids

Description

🛠️ Elevate your drive with smoother shifts and silent power.

EASY MAINTENANCE BOOST - Simple 20 oz bottle designed for quick application, keeping your transmission in top shape without hassle.
SEAMLESS GEAR TRANSITIONS - Experience smoother, more responsive shifting that keeps your drive effortless and precise.
WHISPER QUIET PERFORMANCE - Dramatically cut down transmission noise and shudder for a refined, luxury ride feel.
UNIVERSAL FLUID COMPATIBILITY - Works flawlessly with both conventional and synthetic ATF fluids—no need to switch products.
VERSATILE FOR ALL TRANSMISSION AGES - Perfect for new or older transmissions, ensuring longevity and peak performance.

Lucas Oil 10441 Automatic Transmission Fluid Conditioner is a 20-ounce premium additive designed to improve shifting quality, reduce transmission noise and shudder, and is compatible with all conventional and synthetic ATF fluids. Suitable for both new and older transmissions, it enhances performance and longevity, making it an essential maintenance product for any vehicle owner seeking a smoother, quieter ride.

Specifications

Material	Plastic
Brand	Lucas Oil
Package Information	Bottle
Liquid Volume	1 Fluid Ounces
Item Weight	0.55 Pounds
Recommended Uses For Product	Automotive
Specific Uses For Product	Transmission maintenance and repair
Item Form	Oil
Global Trade Identification Number	00049807104412
Manufacturer	Lucas Oil
Unit Count	20.0 Fluid Ounces
UPC	049807104412 049807804411
Number of Items	1
Model	10441
Item Weight	8.8 ounces
Product Dimensions	7.13 x 3.75 x 2.13 inches
Item model number	10441
Is Discontinued By Manufacturer	No
Manufacturer Part Number	LUCA10441
OEM Part Number	10441

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