Allison 5/6 Speed Transmission Fluid Bypass Filter Kit (2001-2019)

Engineered to protect the Allison 5- and 6-speed transmission where factory filtration ends.

The Allison 1000 automatic transmission relies on precise hydraulic control through electronically actuated solenoids, clutch-control circuits, and a high-capacity valve body to manage torque output from the Duramax diesel engine. Over time, clutch material, wear debris, and fine particulate contamination remain suspended in the transmission fluid, where they can interfere with hydraulic control accuracy, contribute to harsh or delayed shifts, and accelerate internal component wear.

The Insane Diesel Allison 5/6-Speed Bypass Transmission Fluid Filter Kit is engineered specifically for 20012019 Chevrolet and GMC HD trucks equipped with the Allison 1000 transmission. It provides continuous fine-particle filtration beyond what the factory system is designed to capture, helping reduce contamination load and support long-term transmission reliability in towing, high-load, and elevated-temperature operating conditions.

Parts Included In This Kit

• 1 EXTREME 2 filter housing (HX2SHBK) (HX2SHBLU) (HX2SHRED)
• 1 EXTREME 2 filter element (EX2ME) with o-rings (GX1/2)
• 2 In/Out fittings (AN06-04MS90)
• 1 Mounting bracket with hardware (ZBRCK)
• 1 Pressure port fitting (716orifice) + (AN06-02MS90)

Fluid Return Requires Aftermarket Pan:

Aftermarket Banks or PPE Transmission Pan Oil Return

Requires Banks SKU #35146-B or the PPE Transmission Pan Number PPE 128051000

• 1 Return port fitting (AN06-02MS90)
• 8ft hose to be cut to your preference (LW06BK)

Factory Return Compatibility Notice: Our bypass transmission fluid filter kits may be installed without an aftermarket transmission pan only if the transmission is equipped with two separate service portseither on the transmission pan or the transmission housingconsisting of a dipstick and a fill plug, or a fill plug and a dedicated level-check port. Transmissions that use a single combined fill/level port are not compatible with this return method and require an aftermarket transmission pan with a dedicated return port.

If your transmission includes two separate service ports as described above, filtered fluid may be returned through the factory fill port without upgrading to an aftermarket pan. In this case, please contact us with the fill plug fitting size so we can supply the correct return fitting.

Application: Chevy and GMC (2001-2019) Equipped with Allison 5/6 Speed Transmission

• Chevrolet
  • Chevrolet Silverado 2500HD
  • Chevrolet Silverado 3500HD
  • 6.6L Duramax Diesel (LB7, LLY, LBZ, LMM, LML)
  • Model years 20022019
• GMC
  • GMC Sierra 2500HD
  • GMC Sierra 3500HD
  • 6.6L Duramax Diesel
  • Model years 20022019