Allison 5/6 Speed Transmission Fluid Bypass Filter Kit (2001-2019)
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 2001–2019 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 (ZBRCK)
- 1 Pressure port fitting (ANMJ06-7/16”-20ORBK) + (AN06-06FJ90)
- 1 1/4 Orifice (1/4 npt restrictor with 1mm port installed on the housing “IN” port Restricts 120 psi to 1.25 gpm)
Fluid 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)
- 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 (2001-2019) 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
Shipping, Returns & Refund Policy
Shipping Policy
U.S. Shipping
We may occasionally use a shipping carrier different from the one selected at checkout to improve delivery speed, protect fragile items, or reduce overall shipping and handling costs, including packaging and processing.
International Shipping
International shipping charges are calculated at checkout and do not include customs duties, taxes, brokerage fees, or tariffs imposed by your country upon import. These fees are not controlled by Insane Diesel and vary by location and local regulations.
Customers are solely responsible for all import-related charges. We strongly recommend contacting your local customs office or postal service in advance to understand applicable fees before placing an order.
Canada: Estimated duties and taxes may be reviewed at https://www.cbsa-asfc.gc.ca/travel-voyage/dte-acl/est-cal-eng.html
Return & Refund Policy
General Return Policy
Due to the nature of aftermarket automotive components, returns are not accepted for buyer’s remorse, incorrect ordering, or compatibility issues. Customers are responsible for verifying vehicle compatibility prior to purchase. We encourage reviewing installation guides and confirming pressure and return port locations before ordering.
Products that have been installed, used, modified, contaminated with oil or fluids, or show signs of installation are not eligible for return or refund, except where required by law.
Any return request must be approved in advance. Returns sent without authorization may be refused.
Damaged, Defective or Missing Items
All products are inspected prior to shipment. If your order arrives damaged or defective, you must notify us within 7 business days of delivery and provide clear photos of the damage and packaging.
Only unused items in original condition are eligible for replacement or refund. Upon inspection and confirmation, you may choose between a replacement or a full refund.
Missing components must be reported within 15 days of the delivery date. Each order is packed individually to help ensure all components are included and to maintain quality control. A packing slip/manifest is included with every shipment; please review it upon delivery to verify that all components were received.
Approved Returns & Refunds
In rare cases where a return is approved (outside of damage on arrival), requests must be made within 30 days of delivery.
Approved refunds will be issued minus:
- Return shipping costs
- Original outbound shipping costs (even if free shipping was offered)
- Payment processing fees charged by Shopify (approximately 2.4–2.5% + $0.30)
Refunds are issued to the original payment method after returned items are received and inspected.
Contact Us
If you have questions about shipping, returns, or refunds, please contact us at support@insanediesel.com.
Anodized Finish:
Our housings feature a high-quality anodized finish. Because anodized colors can photograph differently under various lighting conditions, the color shown online may appear slightly different in person. Minor tone, shading, or finish variation can also occur naturally from the anodizing process and is a normal characteristic of this type of premium finish.
Product Images:
Product images, especially kit photos, may show earlier versions of certain components. Some parts have since been updated to newer, improved generations and may appear slightly than images. These are the main components that have changed:
• Oil filler caps no longer come with brass swivel center. Replaced with new generation cap that works with our upgraded swivel fittings.
• Fittings in images may have changed slightly as we rolled out with improved versions for simplified installation.
• Steel or brass fittings in images may have changed to our new black fittings to reduce the need for multiple connection points.
• Some mounting brackets have been updated for easier and more convenient access.
Images will be updated soon. Thank you for your patience!
