What It Would Take to Get the Rear Suspension Back to Where It Belongs | Broke Weirdo's Garage
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What It Would Take to Get the Rear Suspension Back to Where It Belongs

Researching rear shocks and coil springs for the wagon. What fits, what doesn't, and why the wagon spring is a different part than the sedan spring.

The wagon is still sitting. The engine is still the priority. But while I'm in research mode anyway, I've been trying to understand what's going on with the rear end and what it would take to fix it.

The car has been sitting for a while, and even before that it had some years of use on it. Forty-year-old coil springs sag. That's not a theory, it's just physics. Whether mine have sagged significantly or just a little, I don't have a measurement yet. But I did get under the car long enough to take some photos, and what I found didn't exactly surprise me.

Close-up of the original rear coil spring on the 1985 Chrysler Town and Country wagon, covered in dust and showing 40 years of use
The original rear coil spring. Forty years old. Still in there.
The rear shock absorber bottom mount showing a cracked and deteriorating rubber bushing, shot from inside the spring coils
The shock mount bushing, shot from inside the spring. That rubber is cracked and crumbling.

The spring itself looks like what you'd expect from a 40-year-old car that's been sitting. Dusty, original, not pretty. The more interesting find was the shock absorber mount bushing in the second photo. The rubber on that bushing is visibly cracked and crumbling. From what I understand, worn or failed bushings affect how the shock absorber is able to do its job, and they can also cause noise and vague handling. On a car that hasn't moved in a while and hasn't been maintained, it's not a shock to see this. But it does mean the suspension work here isn't just about springs and ride height. The bushings are part of the conversation too.

With that in mind, here's what I found when I started researching what it would actually take to sort this out.

What the rear suspension actually is

The 1985 Town & Country is built on Chrysler's K platform, the same front-wheel-drive architecture as the Dodge Aries and Plymouth Reliant. The rear suspension is a beam axle with coil springs and trailing arms. No independent rear suspension, no leaf springs, no air bags. Just a solid axle located by trailing arms, with a coil spring on each side and a shock absorber at each corner.

That's actually good news for a restoration project. It's a simple setup with a well-documented parts chain. The complication is that the wagon body is heavier than the sedan and coupe bodies on the same platform, and from what I've found, the wagon uses a different, heavier spring than what fits the LeBaron sedan or coupe. That matters when shopping, because some spring sets that look like they should fit will explicitly exclude the station wagon. Worth double-checking any part number before ordering.

Worth knowing before ordering

The Moog CC703 rear spring set is one of the most commonly listed parts for the K-platform LeBaron. It explicitly excludes the station wagon. The wagon uses a heavier spring spec due to its greater body weight. Always filter by wagon body style, not just "LeBaron," when looking up springs for this car.

Shocks: the straightforward part

Shocks are the easier piece of this. The rear shocks on the 1982-85 LeBaron are conventional twin-tube hydraulic shocks, widely available from multiple brands at multiple price points. Unlike the front, which uses MacPherson struts, the rear shocks are separate from the springs and can be replaced independently. And given what the bushing in that photo looks like, replacing the shocks is already on the list regardless of what the spring situation turns out to be.

Budget: FCS Auto or equivalent house brand

Budget
FCS Auto or equivalent house brand
~$20 to $30 per shock / ~$40 to $60 for the pair

Available through RockAuto and similar online retailers. Budget shocks for this application aren't hard to find because the K platform was so common. Dodge Aries, Plymouth Reliant, and several Chrysler models all share this rear suspension, so there's a healthy supply chain. The trade-off is consistency and longevity. For a car being restored to drive, they'll restore basic function. For a car being brought back to stock spec and maintained long-term, most people suggest spending a little more.

Mid-range: KYB Excel-G

Mid-range
~$35 to $45 per shock / ~$70 to $90 for the pair

The part I've seen referenced most consistently for this vehicle. KYB describes the Excel-G line as OE-equivalent and valved specifically for each application, meaning the damping rate is calibrated to match what the factory installed rather than being a generic tune. Lifetime warranty. Available at AutoZone, O'Reilly, and most online parts retailers. This is probably the most sensible starting point for a stock restoration. The Excel-G line is specifically intended to put the car back where it was from the factory, not to improve on it.

High-end: Monroe OESpectrum

High-end
Monroe OESpectrum
~$40 to $55 per shock / ~$80 to $110 for the pair

Occupies a similar position to the KYB Excel-G in terms of intent -- OE replacement, vehicle-specific valving -- but sits a bit higher in price. Monroe describes the OESpectrum as using a Twin Technology Active Control System that adjusts damping under different road conditions while filtering out noise and vibration. Whether that matters on a 40-year-old wagon being returned to stock is a reasonable question. But Monroe is a name that's been making shocks for this platform since the cars were new, so fitment is not a concern.


Springs: the more complicated part

Here's where it gets genuinely tricky. Finding rear coil springs specifically for the Town & Country wagon, as opposed to the LeBaron sedan or coupe, is harder than finding shocks. The wagon spring is wound to a heavier spec to handle the additional body weight, which changes its free height and spring rate compared to the sedan application. Installing sedan springs on a wagon would likely result in the car sitting lower than stock. That's the opposite of the goal.

The original rear coil spring on the 1985 Chrysler Town and Country wagon, dusty and showing its age after 40 years
This is what 40 years looks like. The spring is original, and it's been carrying the weight of this wagon since 1985.

Budget: aftermarket wagon-specific spring set

Budget
Aftermarket wagon-specific rear coil springs
~$25 to $40 per spring / ~$50 to $80 for the pair

Generic aftermarket rear coil springs for the wagon body are available through parts sites if you filter specifically for the station wagon fitment rather than the general LeBaron. The key is confirming the listing explicitly includes the wagon. If it just says "LeBaron" without a body style callout, it may be the sedan spring. That's worth a call to the retailer before ordering if the listing isn't clear.

Mid-range: Moog wagon-specific spring

Mid-range
Moog wagon-specific rear coil spring
~$40 to $60 per spring / ~$80 to $120 for the pair

Moog is generally considered the gold standard for replacement springs in this segment, manufactured to OEM specifications with a limited lifetime warranty. The challenge is that the commonly listed Moog part for K-platform LeBaron springs (CC703) explicitly excludes the station wagon. The correct Moog part number for the wagon would need to be confirmed via a fitment lookup at a retailer like RockAuto or NAPA with the wagon body style specifically selected. Worth the extra step to get the right spring.

High-end: custom OEM-spec spring from a specialty supplier

High-end
Custom spring from Eaton Detroit Spring or equivalent
~$150 and up for the pair

For a stock restoration where factory ride height matters precisely, a custom-wound spring from a specialty supplier is an option worth knowing about. Eaton Detroit Spring manufactures springs from OEM blueprints and has been doing this since 1937. They cover Chrysler applications and can quote a wagon-specific spring if they have the specs in their database. This route costs more and takes longer, but the result is a spring built to the original factory specification rather than a close approximation. Worth a call to confirm whether the K-platform wagon is in their catalog before counting on it.


Quick comparison

Part Budget Mid-range High-end
Rear shocks (pair) $40 to $60 $70 to $90 $80 to $110
Rear springs (pair) $50 to $80 $80 to $120 $150 and up
Full rear kit estimate $90 to $140 $150 to $210 $230 and up
Wagon fitment confirmed Verify before ordering Verify before ordering Call to confirm

Where this sits right now

None of this happens until the engine is running. But the photos from under the car tell a useful story before any parts get ordered. The spring is original and tired. The shock bushing is cracked and crumbling. This isn't just a ride height question -- it's a full rear suspension refresh once the car is ready for it.

Shocks are the easier piece to source and the KYB Excel-G is the obvious mid-range starting point. Springs require more care: the wagon body uses a different spec than the sedan, and ordering the wrong spring would make the sagging worse, not better.

One thing I still don't know: exactly how much the rear has sagged. Getting a proper measurement against the factory ride height spec needs to happen before any parts get ordered. A car that's down an inch is a different job than one that's down three. That number will matter when it's time to actually make decisions.