Fleetguard LF3555 vs Fleetguard LF3770: Oil Filter Compatibility
Compare Fleetguard LF3555 and Fleetguard LF3770 oil filters by compatibility, dimensions, thread size, gasket fit, bypass valve, anti-drainback valve status, and match confidence. Use this comparison as a fitment review, not as an automatic substitution guarantee. Both use a 3/4-16 thread.
Quick verdict
Both use a 3/4-16 thread.
- Thread size is the first hard-fit check for any comparison of spin-on filters.
- Gasket OD and gasket ID are the most important seal-related dimensions.
- Height differences can matter for clearance even when thread and gasket fit appear close.
- Bypass and anti-drainback differences may be important, depending on the application.
Fleetguard LF3555 and Fleetguard LF3770 specifications
How matching is scored| Specification | Fleetguard LF3555 | Fleetguard LF3770 |
|---|---|---|
| Thread size | 3/4-16 UNF-2B | 3/4-16 UNF-2B |
| Gasket OD | 72.14 mm | 70 mm |
| Gasket ID | 62.74 mm | 62 mm |
| Can OD | 78 mm | 108 mm |
| Height | 116 mm | 115 mm |
| Internal bypass valve | No | Unknown |
| Bypass PSID | Not applicable | 36.26 |
| Anti-drainback valve | No | Yes |
What matters in this specific comparison
Thread size matches: both are 3/4-16.
Gasket OD differs by 2.1 mm (Fleetguard LF3555: 72.14 mm, Fleetguard LF3770: 70 mm).
Gasket ID differs by 0.7 mm (Fleetguard LF3555: 62.74 mm, Fleetguard LF3770: 62 mm).
Fleetguard LF3555 is 1 mm taller (Fleetguard LF3555: 116 mm, Fleetguard LF3770: 115 mm) -- check clearance before substituting.
Can OD differs by 30 mm (Fleetguard LF3555: 78 mm, Fleetguard LF3770: 108 mm).
Anti-drainback valve differs: Fleetguard LF3770 has one, Fleetguard LF3555 does not.
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.