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

Marsoni M251S
Sale price$99.95
Pay 4 payments of $24.99 a month.Shop Pay
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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Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
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Jon J Ceresa
Phoenix, US
★★★★★ 5
Fits perfectly on my Dyson.
Size: 11SMax-24Pack
Fit perfectly. Work great. Improves your suction and cleaning power back to new. Good price. Fast shipping.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 28, 2026
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Mark
Lexington, US
★★★★★ 5
good
Size: 11S-25Pack
It doesnt feel like the original Eufy Brand but still very good.
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Reviewed in the United States on May 11, 2026
B
Verified Purchase
Barbara Rambow
Carnegie, US
★★★★★ 4
Workable but not as tight to fit
Size: 11SMax-24Pack
They work, but they don’t click in as smooth as the original pieces did
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Reviewed in the United States on January 20, 2026
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Verified Purchase
Huf
Fort Morgan, US
★★★★★ 5
Fast shipping, items as advertised.
Size: 11SMax-24Pack
Perfect fit.
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Reviewed in the United States on May 20, 2026
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Verified Purchase
Your Name Here
Waukegan, US
★★★★★ 5
Works for my G30 Verge
Size: 11SMax-24Pack
Fit my G30 Verge. Works well and brought it back to life. Great value for the money!
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Reviewed in the United States on January 15, 2026

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