Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve Kit

Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve Kit

Marsoni

M251S

$108.93

Get it in 3 business days with 1 day shipping. Friday, May 29

Mishimoto 2017+ GMC 6.6L Duramax L5P Transmission Thermal Bypass Valve KitThe Allison transmission is the backbone of your L5P Duramax. It's responsible for transmitting large quantities of torque from your V8 diesel powerplant. This torque generates a lot of heat, and if that heat isn't dissipated, it can destroy your transmission. The transmission cooler does a good job of keeping trans fluid temperatures in check, but only if the fluid can reach it. The stock cooling system of the Allison 1000 transmission utilizes an in

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We were playing with it and the green part pulled off of the red part. I'm pretty sure that is not supposed to happen. I took the green part away from the dog because that part is too small for my pup to play with. But we continue to play with the red part. My dog likes the texture and the bounciness.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on February 26, 2026

Verified Purchase

Navigator65

Natrona Heights, US

★★★★★ 1

Caution - handle comes off!

Color: Cherries

I really liked this toy when I opened package--our dog liked as well! Until a short time ago when I saw her chewing on the green "stem"! The stem had come apart from the main cherries. This is a small enough part that I think she or any bigger dog could choke on. Our dog is a small lab. Would not recommend buying.

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on February 23, 2026