Help isolate the cab from the frame and smooth out the ride on hardworking heavy-duty trucks with the Monroe Magnum Cab 66145 Cab Suspension Shock Absorber. This gas-charged shock mounts in the cab position and is a direct-fit replacement for many listed Peterbilt applications, among them the 2008-2024 Peterbilt 389, 2008-2020 Peterbilt 367 and 2006-2016 Peterbilt 386. Monroe designed it for heavy-duty cab suspensions, with velocity-sensitive valving aimed at driver comfort (most applications).
- For hardworking commercial vehicles: Designed to handle the demands of high-mileage, severe-use vehicles with cab suspensions.
- Consistent ride: All-weather fluid contains special additives to help with extreme temperatures and reduce oil breakdown. A larger 2-in. reserve tube holds more fluid (when required).
- Handling and control: 10-stage valving is tuned specifically to each vehicle and adjusts to road extremes. A larger 1-3/8-in. bore provides more efficient, consistent control (most applications).
- Strong and durable: A shouldered bushing and a bonded bushing with sleeve help protect against bushing walkout, and arc welds run up to 360°. A PTFE-coated bearing reduces friction between the rod and rod guide and works with a nitrocarburized piston rod for durability (most applications).
The nitrogen gas charge helps maintain tire-to-road contact by reducing aeration and shock fade, and the damping is designed to isolate impact-related noise, vibration and harshness under most driving conditions. Monroe's Installers Advantage approach is aimed at saving time and simplifying the job. Signs a cab shock may need replacing include excessive cab bounce or rocking, fluid leaking from the shock body, and worn bushings. The shock is backed by Monroe's 90-day Risk Free Ride Offer and Limited Commercial Warranty.
See the "Vehicles it fits" section for the full list of cab-position applications.
Interchange: ABPN32G900055 · ABPN32O900055 · A83008 · HD12140546 · 44183008 · F347204 · 98030000 · 83008 · 9160546 · SA66145 · M83008 · 66645 · 2902455 · R716007 · 317535
This part cross-references / interchanges with the following part numbers:
ABPN32G900055, ABPN32O900055, A83008, HD12140546, 44183008, F347204, 98030000, 83008, 9160546, SA66145, M83008, 66645, 66145, 2902455, R716007, 317535
Frequently Asked Questions
What does a cab shock absorber do?
It dampens movement between the cab and the frame on trucks with cab suspensions. This helps isolate the cab for a smoother, more comfortable ride.
Which trucks does the Monroe 66145 fit?
It fits many Peterbilt models in the cab position, among them the 2008-2024 Peterbilt 389, 2008-2020 Peterbilt 367 and 2006-2016 Peterbilt 386. See the "Vehicles it fits" section for the rest.
What signs suggest a cab shock may need replacing?
Common signs include excessive cab bounce or rocking, fluid leaking from the shock body, and worn bushings. Inspect the cab suspension to confirm the cause before replacing the shock.
Is the Magnum Cab 66145 gas-charged?
Yes. It uses a nitrogen gas charge that helps reduce aeration and shock fade.
What warranty comes with this shock?
It comes with Monroe's 90-day Risk Free Ride Offer and Limited Commercial Warranty.
