High Capacity 6 Inch Replacement Transmission Filter Kit for Allison

In this review the High Capacity 6 Inch Replacement Transmission Filter Kit is evaluated for owners and technicians who maintain Allison 3000 and 4000 series transmissions. The bottom line: this kit's biggest selling point is the high capacity, OEM-compatible filter element that fits Allison P/N 29540494 applications and includes all gaskets and o-rings needed for a complete service; buyers get a ready-to-install kit that focuses on filtration durability and a straightforward replacement. For those who value long service intervals and parts made to ISO standards, this kit is a practical option.

Key Features

• Direct compatibility: The filter element is designed to match Allison P/N 29540494 in form, fit and function so installation is straightforward for technicians familiar with Allison 3000-4000 transmissions.
• High capacity media: The glass media and high capacity construction help hold more contamination between service intervals, reducing the frequency of changes under heavy use.
• Complete kit: Includes two filters plus all required gaskets and o-rings so a service can be completed without sourcing additional parts.
• ISO-manufactured: Manufactured to ISO specifications such as ISO 16889 and related standards, providing measurable filtration and durability performance expectations.
• Made in USA: Domestic manufacturing and strict quality control aim to reduce manufacturing defects and ensure consistent reliability.

Who It's For

This kit is aimed at fleet mechanics, owner-operators and maintenance shops that service Allison 3000 and 4000 transmissions and need a replacement that adheres to OEM fit and filtration standards. It is especially useful for vehicles that see heavy duty or continuous operation where higher dirt capacity is valuable.

It is less appropriate for someone who needs a one-off single filter rather than a kit with two elements and all seals, or for applications outside the stated Allison compatibility range. Buyers who require a filter with a different micron rating or non-glass media should check alternative options.

Pros & Cons

Pros

• High capacity glass media holds more contamination for longer service intervals.
• Direct interchange with Allison P/N 29540494 ensures correct fit and simple replacement.
• Complete kit includes two filters and all gaskets and o-rings, reducing downtime sourcing parts.
• Manufactured to ISO specifications and made in USA, supporting consistent quality control.

Cons

• Replacement kit contains two filters which may be more than required for single-filter needs.
• The product description does not list a stamped manufacturing date or warranty length in the kit details.

Specifications

Brand	Big Filter
Compatible Allison P/N	29540494
Filter Type	Transmission
Media	Glass
Height	5.98 in
OD Top / Bottom	3.21 in / 3.21 in
Micron Rating (Beta)	20 micron (Beta 200/20.7)

Our Verdict

The Big Filter 6 in replacement transmission filter kit is a practical, value-minded choice for anyone maintaining Allison 3000-4000 transmissions who wants an OEM-compatible, high capacity solution with all seals included. Its ISO-built glass media and complete kit format make it a sensible buy for fleets and workshops seeking reliable filtration and reduced downtime.

Frequently Asked Questions

Is this kit a direct replacement for Allison 29540494?
Yes, the kit is compatible in fit, form and function with Allison P/N 29540494.

What fluids is the filter compatible with?
The filter is specified for fluid types HH, HL, HM and HV as noted in the technical details.

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