Baldwin Filters BT420 Spin-on Transmission Filter

Product Description

The BALDWIN FILTERS BT420 is a spin-on transmission filter designed for automotive and light-duty applications where reliable fluid filtration protects transmission components from wear and contamination. The spin-on design allows for straightforward servicing without disassembling a filter housing, making it a practical choice for shop and fleet maintenance environments. The BT420 measures 3.69 inches in outside diameter and 4.47 inches in overall length, with a 3/4-inch thread size for secure installation. Licensed technicians and fleet maintenance professionals regularly use this filter as part of scheduled transmission service intervals.

This filter fits applications that call for a spin-on transmission filter with the listed dimensional and thread specifications. It is suited for automotive transmission service in both independent repair shops and fleet maintenance operations. Cross-reference compatibility covers several major filter brands, making it a reliable sourcing option when the OEM filter is unavailable. Compatible replacement filters include ACDelco PF2201, Donaldson P551758, Fleetguard HF6352, Fram PH3589, GMC 25313739, Hastings HF905, and Wix 51624.

Key Features

• Spin-on filter design for fast, clean installation and removal
• 3.69-inch outside diameter and 4.47-inch overall length for precise fitment
• 3/4-inch thread size for secure seating and leak-free operation
• Cross-references to multiple major OEM and aftermarket part numbers
• Rated under UNSPSC Code 40161505 for fluid power filtration

Compatibility

Direct replacement for ACDelco PF2201, Donaldson P551758, Fleetguard HF6352, Fram PH3589, GMC 25313739, Hastings HF905, and Wix 51624. Verify thread size and overall dimensions against the application before installation.

Installation Notes

Transmission filter service should be performed by a qualified technician following the vehicle or equipment manufacturer's service procedures. Drain and contain all transmission fluid before removing the filter, and dispose of used fluid in accordance with local regulations. Hand-tighten the spin-on filter until the gasket contacts the seating surface, then follow the manufacturer's final tightening specification. Do not overtighten, as this can damage the filter gasket or seating surface.