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Monroe 58643 Sensa-Trac Rear Load-Adjusting Shock Absorber1 / 5
Product guide

Monroe 58643 Sensa-Trac Rear Load-Adjusting Shock Absorber

The Monroe 58643 Sensa-Trac is a rear load-adjusting shock absorber listed for trucks. Its gas charge and application-tuned valving are intended to support ride control across changing road and load conditions, so confirm exact vehicle fitment before ordering.

At a glance

  • Load-adjusting design is positioned for light trucks carrying varying loads or towing.
  • The listing describes application-tuned valving and precision-tapered grooves for adapting damping response to road conditions.
  • Nitrogen gas charge is claimed to reduce aeration and help maintain tire-to-road contact.
Price
$202.90Save 24%

Reference price: $267.45

Price checked: Nov 13, 2026

View offer

Often bought together

Pros and cons

Pros

  • Load-adjusting design is aimed at truck use with varying loads or towing.
  • The listed valving and groove-tube features provide a specific ride-control rationale rather than a basic shock-only description.
  • Customer feedback reports positive fit and straightforward installation, though vehicle compatibility still needs confirmation.

Technical specifications

13 specifications
Identity
BrandMonroe
Model58643
PositionRear
Vehicle typeTruck
Number of items1
Dimensions and installation
Dimensions listed64.77 x 18.29 x 9.4 cm; 5 kg
Weight listed5000 g
Materials and protection
Material listedPolytetrafluoroethylene
Listed design features
FluidAll Weather Fluid: Contains special modifiers to reduce friction and ensure smooth rod reaction
ValvingFull Displaced Valving: Tuned specifically for each application, this valving automatically adjusts to road extremes to provide consistency and ride comfort
PistonFluon Banded Piston: Works with the existing groove tube technology to provide responsiveness to changing road conditions
Tube designUnique Groove Tube - PSD: Precision tapered grooves help provide added control without sacrificing comfort
Gas chargeNitrogen Gas Charged: For improved ride and handling, helps maintain tire to road contact by reducing aeration

What to know before buying

  • Confirm that model 58643 matches the vehicle, axle position and suspension configuration. The listing gives only a general truck type and rear position, not a complete vehicle fitment list. Monroe also advises inspecting worn coil or air springs and checking alignment when replacing ride-control parts.

Who is it for?

A good fit for

  • Truck owners seeking a rear load-adjusting shock for varying loads or towing, after confirming exact fitment.
  • Buyers who want a shock with listed gas charging and application-tuned valving.

Less suited to

  • Buyers who need a confirmed fitment for a particular vehicle without checking application details.
  • Buyers who need a multi-shock set, since the listing specifies one item.
Monroe 58643 Sensa-Trac Rear Load-Adjusting Shock Absorber · photo 2
Additional product photo 2

Customer reviews on Amazon

4.6 / 5 · 718 ratings
  • 5 stars79%79%
  • 4 stars11%11%
  • 3 stars4%4%
  • 2 stars1%1%
  • 1 star5%5%

Customer feedback highlights perceived quality, fit and relatively straightforward installation, with some customers saying performance exceeded their OEM parts. These reports may matter to buyers replacing a rear truck shock, but they do not confirm fit for a specific vehicle. Stability and durability experiences are mixed, so customer praise should not be read as assurance of long-term results.

Positive themes

  • Customers describe the shock as good quality and report easy installation or replacement.
  • Feedback reports good fit on some trucks and positive impressions of ride or shock performance.
  • Some customers consider it worthwhile for the price.

Mixed feedback

  • Customer opinions on stability and durability are mixed.

Frequently asked questions

Does this shock fit my truck?

The listing identifies it as a rear shock for trucks but does not provide a complete vehicle fitment list. Match model 58643 to your exact vehicle and suspension before purchase.

Is this sold as a pair?

The listing states one item. It does not indicate a pair.

What features are described?

The listing specifies nitrogen gas charging, application-tuned valving, a Fluon banded piston and a groove-tube design. These are manufacturer claims, not independently verified performance results.

What do customers report?

Feedback describes quality, fit and installation positively, while stability and durability opinions are mixed. These reports do not establish fitment for a particular vehicle.

Monroe 58643 Sensa-Trac Rear Load-Adjusting Shock Absorber · photo 3
Additional product photo 3

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