Description
Monroe 65400 Gas Magnum 65 is a nitrogen gas-charged heavy-duty shock absorber for Class 6–8 air-spring and taper-leaf suspensions, replacing Peterbilt 307423 / 306084, Mack 650400, Volvo 3919946, and Gabriel 85033 / 89427. The shock uses a 1-3/4 in bore with a 2-3/8 in reserve tube and 10-stage valving tuned for heavy-truck damping, with 17.375 in compressed / 26.750 in extended length and a 9.375 in stroke.
Signs You Need New Shock Absorbers
- Excessive bouncing or floating sensation over bumps
- Nose diving during braking or squatting during acceleration
- Uneven or cupped tire wear patterns
- Vehicle swaying or poor handling in crosswinds
- Oil leaking from shock body or seals
- Visible damage to shock body, bushings, or mounts
- Increased stopping distance
Specifications
| Manufacturer | Monroe |
|---|---|
| Part Number | 65400 |
| Series | Gas Magnum 65 |
| Part Type | Shock Absorber |
| Compressed Length | 17.375 in (44.1 cm) |
| Extended Length | 26.750 in (67.9 cm) |
| Travel | 9.375 in (23.8 cm) |
| Bore | 1-3/4 in |
| Reserve Tube | 2-3/8 in |
| Gas Charge | Nitrogen |
| Valving | 10-Stage |
| Dust Shield | Yes (Metal) |
| Extended Hydraulic Lockout | Yes |
| Country of Origin | USA |
Cross References
This shock absorber replaces or is equivalent to the following part numbers:
- Peterbilt: 307423, 306084, 305384, 305106, 665633, 03-07423, 03-06084, 03-05384
- Kenworth: 0306085PLUS, 03-0742
- Paccar: 665633, 307423, 306084
- Mack: 650400
- Volvo / White / GMC: 3919946, SA5033
- International / Navistar: AMS650400
- Gabriel: 85033, 89427
- Meritor: M85033, M89427
- KYB: 341620, 341621
- Sachs: 315549
- Neway: 57365400
- Monroe (Alternate): 650400
- Haldex: SA65400
- Fleetrite: AMS650400
- Alliance: ABP N32 G900039, ABP N32 O900039
- Bulldog: HD1215-0037, HD1215-003, HD1214-0612
- Dayton Parts: 441-85033, M65400
- FCS: F346598, F346599, F343368, F344355, F344353
- NAPA: 65400
- Automann: A85033
Applications
This shock fits the rear suspension of the following heavy-duty trucks:
- Peterbilt 357 (1990–2008)
- Peterbilt 362 (1981–2006)
- Peterbilt 372 (1989–1997)
- Peterbilt 375 (1987–1996)
- Peterbilt 376 (1988–1999)
- Peterbilt 377 (1987–2001)
- Peterbilt 378 (1988–2007)
- Peterbilt 379 (1986–2007)
- Peterbilt 330 / 384 / 385 / 386 / 387 / 587 (select years with compatible suspension)
- Kenworth — select models with compatible Paccar suspension
- Mack — select models with compatible suspension
- Volvo / White / GMC — select heavy-duty models
- International / Navistar — select models
Verify your suspension type and vehicle specifications before ordering. Some applications may require different Monroe part numbers depending on suspension configuration (Neway, FlexAir, Air Trac, Haulmaax, etc.).
