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Unity rear conversion kit boxed set with brackets and hardware

Unity

Unity 30-540000-HD Rear Conversion Kit

SKU CH-4JRW-YFP8Y

Converts air suspension to heavy-duty steel springs on 1989-2011 Lincoln Town Car, Crown Victoria and Grand Marquis

  • Converts air suspension to reliable passive setup for 1989-2011 Lincoln Town Car
  • Heavy-duty rear conversion fits 1992-2011 Ford Crown Victoria models
  • Unity's 50 years manufacturing experience ensures durable brake repair components
  • Steel spring retrofit eliminates air ride failure points on Mercury Grand Marquis
  • Direct manufacturer supply provides quality suspension parts for trouble-free installation

Unity Rear Conversion Kit

Unity automotive has over 50 years of experience in the aftermarket automotive industry. The Elite Suspension Line offers solutions to retrofit steel springs converting your air ride to a more reliable passive suspension setup. Parts are made to ensure a trouble-free installation and long-lasting reliability. This kit is designed for heavy duty models only.

Fits Lincoln Town Car Crown Victoria Grand Marquis

This product fits 1989-2011 Lincoln Town Car, 1992-2011 Ford Crown Victoria, and 1989-2011 Mercury Grand Marquis heavy duty models. It suits owners replacing failed air suspension with a passive steel spring setup. Builders working on standard duty models or different vehicle platforms should look at other options. The kit is not intended for lightweight suspension configurations.

Heavy Duty Model Requirement

The specification that decides fitment is the heavy duty model requirement across all listed model years. Only 1989-2011 Lincoln Town Car, 1992-2011 Ford Crown Victoria, and 1989-2011 Mercury Grand Marquis heavy duty models are compatible. Standard duty variants will not work with this conversion kit. Verify your vehicle suspension rating before purchase.

How it compares

Measured against everything we stock in Brake Service Tools & Presses, at today’s prices. Recalculated every night.

Price $72.99
Cheaper than about 61% of the 1,702 comparable items (median $86.99).

Specifications

Product
Brand nameUNITY

Questions about this item

Will this rear conversion kit fit the original air-suspension mounts on my 1992 Ford Crown Victoria?

The kit is designed for 1992-2011 Ford Crown Victoria heavy-duty models, so it matches the factory mounting points on those vehicles.

How can I confirm the conversion is working correctly once installed?

After installation the rear should sit at a consistent ride height without the compressor cycling, and the vehicle should handle evenly loaded or unloaded.

Does the box include new shocks or do I need to purchase them separately?

The kit converts the air-spring system to passive steel springs; shocks are not included and must be bought separately if required.

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