Monroe 58578 rear shock absorber for the 1987-1991 Chevrolet Blazer and other vehicles pairs a shock with a coil spring to support the rear suspension. As a Monroe load adjusting shock absorber, it carries a calibrated coil spring that adjusts to changing road and weight conditions.
- Load Adjusting series for light trucks that tow or carry varying loads
- Heavy gauge, calibrated coil spring reduces sag when loaded up to 1,200 lbs (capacity limited by suspension, tires and transmission)
- Full-displaced valving tuned for each application adjusts to road extremes for ride consistency
- All-weather fluid with special modifiers handles extreme temperatures, and a PTFE-banded piston reduces friction against the pressure tube
- Self-lubricating fluid seal retains gas, and the heavy-duty nitrocarburized rod is made for long life
- Nitrogen gas-charge reduces aeration and shock fade to keep tire-to-road contact
Quick facts
- Part: Monroe 58578 shock absorber
- Fits: 1987-1991 Chevrolet Blazer and other vehicles
- Position: Rear
- Condition: New
Rear sag, a bouncy ride or oil on the shock body can mean the shock is worn. Tires, bushings and other rear suspension parts can be behind those signs too, so find the cause before buying.
Fits
Listed for a wide range of Chevrolet and GMC models, including the 1987-1991 Chevrolet Blazer, the 1989-1991 Chevrolet R1500 Suburban and the 1989-1991 Chevrolet R2500 Suburban. Each application takes one, and this listing is a pack of 2.
Specifications
Fit and size
- Position: Rear
- Sold as: pack of 2
- Compressed length: 14 in (355.6 mm)
- Extended length: 22.875 in (581 mm)
- Travel length: 8.875 in
- Upper mount: loop bushing and cantilever pin mount, 5/8 stud diameter X 1 5/16 stud length
- Lower mount: loop bushing and sleeve mount, 9/16 sleeve ID X 1.5/8 sleeve OAL
Build and materials
- Type: shock absorber and coil spring assembly, load adjusting
- Damping type: oil
- Gas charge: nitrogen
- Dust shield: metal, included
- Condition: New
- Country of origin: China
In the box
Two shock absorber and coil spring assemblies, each with its dust shield.
Interchange: 43111
Frequently Asked Questions
Does the Monroe 58578 fit the 1989-1991 Chevrolet R1500 Suburban?
Yes, the Monroe 58578 rear shock absorber is listed for the 1989-1991 Chevrolet R1500 Suburban. If your truck is another model or year, look it up in the "Vehicles it fits" section before ordering.
How much weight does this Monroe rear shock absorber handle?
The Monroe 58578 has a heavy gauge, calibrated coil spring that reduces sag when loaded up to 1,200 lbs. That capacity is limited by the suspension, tires and transmission, so see the owner's manual.
Is this Monroe car shock absorber sold as a pack of 2?
Yes. This listing is a pack of 2, and each piece is a shock absorber with a coil spring and a dust shield.
Is this shock absorber gas-charged?
Yes, this shock absorber has a nitrogen gas-charge that reduces aeration and shock fade. Its damping type is oil.
What mounts does this rear shock absorber use?
The upper end is a loop bushing and cantilever pin mount with a 5/8 stud diameter. The lower end is a loop bushing and sleeve mount with a 9/16 sleeve ID.
