Hayden Automotive 397 Transmission Line Fitting Kit
Key features
- •GM 1996 and later snap-in style lines
- •Simplifies transmission cooler installation
- •For auxiliary transmission cooler installation without cutting OE lines
Hayden Automotive 397 Transmission Line Fitting Kit
List Price: $26.35$23.72DEALYou Save: $2.63 (10%)
Free shippingFree Returns – 30 daysFree Order CancellationSecure Payment2–3 Days DeliveryGet It June 22, 2026In Stock (12)No marketing spamNo account requiredFulfilment by FedEx / Amazon / UPS / ShipwirePayPal / Card Buyer Protection
Customer Reviews
Reviews sourced from verified Amazon purchasers4.7
out of 5
Based on 10 reviews
5★
90%
4★
10%
3★
0%
2★
0%
1★
0%
Works For Transmission Coolers
Dan•July 29, 2017
I used this to install an auxiliary transmission cooler and it worked out just fine. No leaks so far.
Worked great in my GMC Yukon
T Wechsel•July 20, 2017
Fits right in the factory radiator cooler on my 2007 GMC Yukon. Used it to flush all the fluid out. (see youtube). Then used it to run the lines to my new after market trans cooler. Worked great and didn't have to modify any factory connections.
Must have for trans cooler install.
Louie Knives•June 6, 2017
Used this to install a trans cooler in my TBSS and it worked like a charm, saves the pain of cutting the line and makes it look like a nice clean install not all hacked up like some people do.
This little adapter made life easy.
Jess H.•March 17, 2017
2008 GMC Sierra. This little adapter made life easy for installing an external trans cooler.
Five Stars
Michael Evertsen•February 11, 2017
Does as advertised. This makes changing the transmission fluid on a GM much, much easier.
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