Fleetguard LF3398 vs Fleetguard LF3637: Oil Filter Compatibility
Compare Fleetguard LF3398 and Fleetguard LF3637 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 1-16 thread.
Quick verdict
Closest known dimensional difference: height +5 mm. Verify application-specific requirements before substituting.
- 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 LF3398 and Fleetguard LF3637 specifications
How matching is scored| Specification | Fleetguard LF3398 | Fleetguard LF3637 |
|---|---|---|
| Thread size | 1-16 UN-2B | 1-16 UN-2B |
| Gasket OD | 71.27 mm | 71.98 mm |
| Gasket ID | 62.23 mm | 62.53 mm |
| Can OD | 108 mm | 94 mm |
| Height | 171 mm | 176 mm |
| Internal bypass valve | No | No |
| Bypass PSID | Not applicable | Not applicable |
| Anti-drainback valve | No | No |
What matters in this specific comparison
Thread size matches: both are 1-16.
Gasket OD differs by 0.7 mm (Fleetguard LF3398: 71.27 mm, Fleetguard LF3637: 71.98 mm).
Gasket ID differs by 0.3 mm (Fleetguard LF3398: 62.23 mm, Fleetguard LF3637: 62.53 mm).
Fleetguard LF3637 is 5 mm taller (Fleetguard LF3398: 171 mm, Fleetguard LF3637: 176 mm) -- check clearance before substituting.
Can OD differs by 14 mm (Fleetguard LF3398: 108 mm, Fleetguard LF3637: 94 mm).
Open related filters
Before substituting, verify thread fit, gasket sealing dimensions, height clearance, bypass behavior, and anti-drainback requirements for your specific application.