15% OFF ORDERS $35+ | 20% OFF $100+ | ONLINE ONLY
USE CODE
CRUISE
*
Exclusions apply.
Advance Auto Parts Logo
Choose a Store
  • Shop All
  • Replacement Parts
  • Performance Parts
  • Accessories
  • Oil & Fluids
  • Special Offers
  • Advance Rewards
  • Advice & How-Tos
  • Project Guides
  • FAQ / Help Desk
Loading...
Share
Product thumb
Product thumb
Product thumb
Product thumb
Product thumb
Product main large

Monroe Load Adjusting Rear Suspension Shock Absorber and Coil Spring Assembly

(3 reviews)
Part # 58645
limited lifetime warranty
Loading...
Loading...
How Would You Like To Get This Item?

Store Pickup

Loading...Loading...Loading...

Same Day Home Delivery

Loading...Loading...Loading...

Home Delivery

Loading...Loading...Loading...
Loading...
Loading...
Loading...Loading...Loading...Loading...Loading...

Product Information

Product Details
Part No. 58645
Warranty Details (Limited Lifetime Warranty)
Ideal for light trucks that that tow or carry varying loads, Monroe load adjusting shocks include a heavy gauge calibrated spring that adjusts to road and weight conditions to provide extra control when operating conditions get more demanding.

Product Features:
  • REDUCES SAG UNDER LOAD - Ideal for occasionally hauling or towing varying loads, heavy gauge, calibrated coil spring reduces sag when loaded up to 1,200 lbs. (capacity limited by suspension, tires and transmission, see owner's manual)
  • EXCEPTIONAL HANDLING - Tuned specifically for each application, full-displaced valving automatically adjusts to road extremes to provide ride consistency
  • CONSISTENT RIDE - OE all-weather fluid contains special modifiers to handle extreme temperatures and PTFE-banded piston helps reduce friction between the piston and pressure tube to enhance responsiveness to changing road surfaces
  • LONGER SERVICE LIFE - Self-lubricating fluid seal retains gas and reduces excessive friction against the piston rod to help reduce premature wear while heavy-duty nitrocarburized rod delivers long life
  • IMPROVES PERFORMANCE - Nitrogen gas-charge maintains tire-to-road contact for improved ride and handling by reducing aeration and shock fade
  • Nitrogen Gas Charged: For Improved Ride & Handling, Helps Maintain Tire To Road Contact By Reducing Aeration - On Most Applications
  • 5/8 nitrocarburized rod for long service life.
  • Special Seal: 'Self-lubricating' fluid seal designed to retain gas without excessive wear or friction.
Specifications
Compressed Length:
11.36 in

Extended Length:
17.32 in
Loading...
Loading...Loading...Loading...Loading...Loading...
4.33 out of 5
3 Customer Reviews
100% of respondents would recommend this to a friend
Ratings Distribution
5 Stars
1
4 Stars
2
3 Stars
0
2 Stars
0
1 Star
0
Pros
1
Great price
1
Improved Ride
1
Lifetime warranty
1
Easy To Use
1
Versatile
Cons
1
May need a special tool
1
Beware No Dirt Boot
Best Uses
1
Perfect replacement
1
Minivan
Car/Motorcycle Describe yourself
1
D I Y Mechanic
Reviewed by 3 Customers
Great Shock - Careful on the Install
Staff Reviewer -
I own a 2001 Honda Odyssey EX with around 96K miles on the odometer...and my main rear suspension springs & shocks are the originals. My choice was to purchase either regular shocks or go with the Monroe 58645 Sensa Trac Load Adjusting shocks. I do not tow anything other than a bike carrier with 4 bikes and the usual load of four to six passengers - but add camping gear and luggage as well and the rear end is challenged to say the least. Since I didn't feel like buying new rear springs along with shocks, I went with the Sensa Tracs. I was concerned that these shocks would make my van ride more like a truck unloaded; however, no worries - the ride is smooth and compliant. Fully loaded, the ride gets even better and takes away that "boat suspension" feeling going over bumps. Keep an eye on the frequent Advance Auto sales and their price for a pair of these beats anyone else hands down. Installation Notes: Spray the upper and lower shock absorber mounts with WD-40 the day before you do the job - it makes loosening the nuts & bolts a lot easier. Start the job by loosening the lug nuts on both rear tires, raise the van up, use jack stands for support (you will need your floor jack later), and take off the tires. You can install these shocks without any special tools; however, I would strongly recommend a spring, strut or ratcheting strap compressor (borrow it from Advance Auto - they loan out tools) to shorten the spring a few inches so that the upper part of the shock clears the undercarriage (upper mounting bracket area) completely...this will ensure that you will have the proper angle to slide the bottom part of the shock on first and loosely install the nut. Remove the compressor tool and guide the top of the shock through the upper mounting bracket. If your shock comes up a bit short and your upper flange bolt won't go through, use your floor jack to lift it up the rest of the way. Just place the jack under the rear suspension near the lower shock absorber mount and raise it until your flange bolt fits through. Torque the upper and lower mounting hardware to specs. That's it...Enjoy your ride!
Bottom Line Yes, I would recommend to a friend
Work fine - need a strap to install
Staff Reviewer -
I put these on my 2003 Odyssey. They work fine with a light load, but I haven't tried them with a heavy load. I had to use a ratcheting strap to compress the springs a bit while installing them to work them into position. It's a little fussy due to the installation angle but it's workable.
Bottom Line Yes, I would recommend to a friend
Easy to install, time will tell
Verified Buyer -
Installation is very easy on 2004 Honda Odyssey, following the "hammering" method for lower ends installation shown on Youtube. One concern is the shocks have no dirt protection boot, exposing the rods to the sand and dirt in daily use. That may be one of the reasons others had reported relatively short life of the shocks in spite of Monroe's assurance with their "life time" warranty. Monroe, please comment.
Bottom Line Yes, I would recommend to a friend
Loading...
Loading...Loading...Loading...Loading...Loading...
No results
Loading...
Loading...Loading...Loading...Loading...Loading...
Feedback
Be The First To Know About Deals And Promotions.
Plus, create an account to receive $5 off of $20 or more.
TOP REPLACEMENT PARTS
Brake Pads & Shoes
Brake Rotors
Alternators
Water Pumps
Starters
Brake Calipers

Order Lookup

Help Desk

Store Locator

In Store Services

Mobile App

CUSTOMER SUPPORT
Accessibility Statement
Contact Us
Forgot Password
Help Desk
In Store Pickup
In Store Services
Order Tracking
Recall Information
Return Policy
Same Day Delivery
© 2026 Advance Auto Parts
Privacy Policy
Terms of Use
Site Map
ADVANCING A WORLD IN MOTION®