Allison 5/6 Speed Transmission Bypass Oil Filter Kit (2002-2019)
Allison 5/6 Speed Transmission Bypass Oil Filter Kit (2002-2019)
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 2002–2019 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 (ZBRCKX12)
- 1 Pressure port fitting (AN06-02MS90)
Oil Return Options:
• 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 + 1/8 Orifice)
- 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 ports—either on the transmission pan or the transmission housing—consisting 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 (2007.5-2024) Equipped with Allison 5/6 Speed Transmission
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Chevrolet
- Chevrolet Silverado 2500HD
- Chevrolet Silverado 3500HD
- 6.6L Duramax Diesel (LB7, LLY, LBZ, LMM, LML)
- Model years 2002–2019
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GMC
- GMC Sierra 2500HD
- GMC Sierra 3500HD
- 6.6L Duramax Diesel
- Model years 2002–2019
Questions or Need Help?
Call (801) 901-0667
USA SHIPPING:
We may occasionally use a different shipping carrier than the one selected at checkout to improve delivery speed, protect fragile items, or help reduce overall shipping and handling costs, including packaging and processing fees
INTERNATIONAL SHIPPING:
International shipping costs are calculated at checkout; however, these charges do not include any additional customs duties, taxes, brokerage, or tariff fees that may be applied by your country upon import. These fees are not controlled by us and can vary widely based on your location and local regulations.
CANADA: For an estimate of what duty and taxes will be, visit this site here:
https://www.cbsa-asfc.gc.ca/travel-voyage/dte-acl/est-cal-eng.html
OTHER COUNTRIES: Please search for your government's "estimated duty and taxes" calculator.
We strongly recommend that you contact your local customs office or postal service in advance to understand what import fees may apply before placing your order. This will help ensure a smooth delivery and avoid unexpected charges when your package arrives.
RETURN POLICIES
GENERAL RETURN POLICY:
Please review the installation guide or video before purchasing, and confirm the pressure and return port locations for your engine. We're happy to provide guidance if needed. Returns are not accepted for buyer’s remorse or if the kit doesn’t match your engine model, so please double-check compatibility before ordering. If you encounter any issues, contact us — we’re committed to finding a solution.
DAMAGED PRODUCT RETURNS:
All products are inspected before shipping. If your product arrives damaged, please report it with photos within 7 business days of delivery. Only unused, damaged items in their original condition are eligible for replacement or refund. If a product is confirmed to be defective or damaged, you can choose between a replacement or full refund after inspection.
CANCELLATIONS AND OTHER REFUND POLICIES:
In rare cases where a product qualifies for a return (outside of damage on arrival and within 30 days of delivery), a refund will be issued minus return shipping costs and the Shopify transaction fee (2.4%-2.5% + 30¢). Although we *may* offer free shipping during promotions, the original shipping cost will also be deducted from your refund.
Your satisfaction is important to us! If you have any questions or need assistance, please contact us at support@InsaneDiesel.com.
