High Capacity 6 Inch Replacement Transmission Filter Kit - Allison

In this review of the High Capacity 6 Inch Replacement Transmission Filter Kit, the bottom line is simple: this kit is for technicians and fleet owners who need a reliable, direct-replacement filter for Allison 3000 and 4000 series transmissions. The reviewer found the kit notable for its complete contents and adherence to OEM fit, form and function, making it a practical choice when replacing Allison P/N 29506337. The kit's high capacity media and American manufacturing give confidence that it will protect transmission components under normal service intervals.

Key Features

• Direct interchange: The kit is compatible with Allison P/N 29506337 and installs in the same fit and form as the original, reducing fitment concerns.
• Complete service kit: Includes two filters plus all required gaskets and o-rings, so a full filter change can be completed without sourcing extra parts.
• High capacity media: The glass product media and rated beta performance help trap contaminants and extend element life between services.
• Manufactured to ISO: Made in USA and produced to ISO specifications for dirt capacity, flow fatigue and fluid compatibility, supporting consistent quality control.
• Durable construction: Built for reliability and guaranteed free from manufacturing defects, which reduces the risk of premature failure during normal operation.

Who It's For

This kit is aimed at commercial vehicle owners, fleet maintenance shops, and independent mechanics who service Allison 3000 and 4000 transmissions and prefer a replacement that matches OEM fit and performance. It is especially useful when a technician wants a high capacity filter element and the convenience of receiving both filters and all sealing components in one package.

Those who should look elsewhere include owners of transmissions outside the Allison 3000/4000 family or anyone who requires a nonstandard filter material or custom sizing. This product is focused on direct replacement and proven ISO-tested construction rather than experimental or specialty filter media.

Pros & Cons

Pros

• Direct compatibility with Allison P/N 29506337 makes fitment straightforward and reduces installation errors.
• Complete kit contents mean no extra gaskets or o-rings need to be purchased separately.
• Made in USA with ISO-driven manufacturing provides traceable quality control and consistent materials.
• High capacity glass media offers strong contaminant retention for extended service intervals.

Cons

• Kit is specific to Allison 3000 and 4000 series, so it is not universal and must be matched to the transmission model.

Specifications

Brand	Big Filter
Compatible Allison P/N	29506337
Filter Type	Transmission
Product Media	Glass
Height	5.98 in
OD Top / OD Bottom	3.21 in / 3.21 in
Micron Rating	20

Our Verdict

The High Capacity 6 Inch Replacement Transmission Filter Kit is a solid value for anyone maintaining Allison 3000 and 4000 transmissions who wants OEM-compatible performance and the convenience of a complete gasket and o-ring set. Its ISO-manufactured glass media and American production make it a dependable choice for routine service and fleet maintenance.

Frequently Asked Questions

Is this kit a direct replacement for the Allison OEM filter?
Yes, it is designed to be compatible in fit, form and function with Allison P/N 29506337.

Does the kit include seals and gaskets for a full service?
Yes, the package includes two filters plus all required gaskets and o-rings for a complete filter change.

What fluids is this filter media compatible with?
The filter is specified for HH, HL, HM and HV fluid types per the technical description.