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Hayden Automotive 397 Transmission Line Fitting Kit

4.8 4.8 out of 5 stars 475 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Automotive Replacement Transmission Cooling Lines by Hayden Automotive

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Purchase options and add-ons

Brand Hayden Automotive
Material Metal
Color Multi
Item Weight 22.68 Grams

About this item

  • GM 1996 and later snap-in style lines
  • Simplifies transmission cooler installation
  • For auxiliary transmission cooler installation without cutting OE lines
  • Package Dimensions: 12.7 L x 4.064 H x 8.89 W (centimeters)
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$13.00
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$8.84 ($0.88/Foot)
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$4.73
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Product Description

The kit allows for auxiliary transmission cooler installation without cutting OE lines and also simplifies transmission cooler installation.

Product information

Technical Details

Additional Information

Warranty & Support

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Hayden Automotive 397 Transmission Line Fitting Kit


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What's in the box

  • Line Fitting Kit
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    Price$13.00$9.99$15.68$8.99-31% $6.88
    List:$9.99
    $16.49
    Delivery
    Get it as soon as Tuesday, Apr 2
    Get it as soon as Tuesday, Apr 2
    Get it as soon as Tuesday, Apr 2
    Get it as soon as Tuesday, Apr 2
    Get it as soon as Tuesday, Apr 2
    Get it as soon as Tuesday, Apr 2
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    Amazon.com
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    material
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    Looking for specific info?

    Customer reviews

    4.8 out of 5 stars
    4.8 out of 5
    475 global ratings

    Customers say

    Customers like the fit, performance, value, ease of installation, and leakage of the hardware tubing. For example, they mention it fits perfectly, works great for adding a trans cooler, and is worth every penny. That said, they say it's easy to hook up and has no leaks.

    AI-generated from the text of customer reviews

    36 customers mention36 positive0 negative

    Customers are satisfied with the fit of the hardware tubing. They mention that it fits perfectly, works great, and is easy to route. Some say that it works well in the trans cooler return.

    "Changed the fluid and filter in my Silverado. This fit right in the return opening at the radiator and let me use a nylon hose to route the fluid to..." Read more

    "...Fits in the trans cooler return perfectly, no leaks. It took roughly 15 minutes to replace my old fluid with new...." Read more

    "...Fit well and is not leaking at all." Read more

    "...a trailer several thousand miles since, with no leaks, so the fitting worked perfectly...." Read more

    36 customers mention36 positive0 negative

    Customers are satisfied with the performance of the hardware tubing. They mention that it works perfectly, is fast, and easy to use. Some say that it's great for flushing transmission fluid.

    "...Just instal this part, slide your aux cooler line to it & clamp. Worked great, the first time with no leaks or problems. Highly recommended." Read more

    "Work perfectly...." Read more

    "...Stop after 12 seconds and put a few quarts in your truck. worked perfect...." Read more

    "...guide on Amazon says it doesn't fit my vehicle I tried it and it works fine...." Read more

    29 customers mention22 positive7 negative

    Customers like the value of the hardware tubing. They say it's worth every penny, saves them money, and is a great piece.

    "Price is a bit high but worth it. Perfect fit and easy install." Read more

    "This thing has been a lifesaver as well as a money saver for flushing my transmission on my Chevrolet Silverado 2500hd." Read more

    "Great price" Read more

    "Good product and works great, however extremely overpriced. I paid because I needed it fast...." Read more

    20 customers mention20 positive0 negative

    Customers find the installation of the hardware tubing adapter to be easy. They mention that it makes the installation a breeze, making the conversion much easier. Customers also say that the adaptor makes it simple to tie into the radiator and saves them a lot of hassle.

    "...It's an easy DIY project vs a few hundred at a transmission shop" Read more

    "...It makes install a breeze, saving you cuts and splices of trans fluid lines...." Read more

    "Price is a bit high but worth it. Perfect fit and easy install." Read more

    "Used this when adding a trans cooler, fits perfectly and makes this conversion much easier. I would not add a trans cooler without this fitting...." Read more

    11 customers mention11 positive0 negative

    Customers are satisfied with the leakage of the hardware tubing. They mention that it works perfect with no leaks, and seals well. Some say that it's a bit high priced.

    "Worked good for draining and refilling transmission fluid on my 2011 DTS. Price is a bit high however" Read more

    "...Fits in the trans cooler return perfectly, no leaks. It took roughly 15 minutes to replace my old fluid with new...." Read more

    "...Worked great, the first time with no leaks or problems. Highly recommended." Read more

    "...Fit well and is not leaking at all." Read more

    5 customers mention5 positive0 negative

    Customers are satisfied with the quality of the hardware tubing. They mention that it is a solid item and fits for their 2010 Suburban LT. Some customers also say that the Hayden fitting is able to help with a temporary repair of a leaking.

    "This Hayden fitting is a quality item that helped me with a temporary repair of a leaking OEM transmission cooler...." Read more

    "Solid item and fit for 2010 Suburban LT" Read more

    "Never had to use it but the quality great." Read more

    "Very well machined and robust." Read more

    No leak transmission flush by yourself
    5 Stars
    No leak transmission flush by yourself
    This Hayden transmission fitting is the way to flush out your old fluid completely, by yourself.Used it on my 2007 Silverado 2500 HD.When you remove your transmission pan to change the fluid,filter & gasket,there is still dirty fluid in the system.This fitting is exactly like the oil cooler line hose to your transmission.I disconnected the line in my truck & put this fitting there.Connected 10' of clear hose to it & clamped the other end into a 5 gallon bucket.The clear hose used is3/8 ID,which slides onto the fitting.The 10' allowed me to place the bucket by the driver's door so I could start the truck & see the fluid pumping out.When it starts to slow down,shut vehicle off & replace fluid,repeat.I did this with 4 gallons of transmission fluid at 110,000 miles.Each flush,the fluid gets cleaner.Never realized how dirty my fluid was till I did this.When you are done,remove the fitting & reconnect your line.Make sure the O ring is good when doing this.
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    Top reviews from the United States

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    5.0 out of 5 stars No leak transmission flush by yourself
    Reviewed in the United States on September 15, 2023
    This Hayden transmission fitting is the way to flush out your old fluid completely, by yourself.
    Used it on my 2007 Silverado 2500 HD.When you remove your transmission pan to change the fluid,filter & gasket,there is still dirty fluid in the system.This fitting is exactly like the oil cooler line hose to your transmission.I disconnected the line in my truck & put this fitting there.Connected 10' of clear hose to it & clamped the other end into a 5 gallon bucket.The clear hose used is
    3/8 ID,which slides onto the fitting.The 10' allowed me to place the bucket by the driver's door so I could start the truck & see the fluid pumping out.When it starts to slow down,shut vehicle off & replace fluid,repeat.I did this with 4 gallons of transmission fluid at 110,000 miles.Each flush,the fluid gets cleaner.Never realized how dirty my fluid was till I did this.When you are done,remove the fitting & reconnect your line.Make sure the O ring is good when doing this.
    Images in this review
    Customer image Customer image
    Customer imageCustomer image
    4 people found this helpful
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    Reviewed in the United States on January 29, 2021
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    Reviewed in the United States on April 20, 2022
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