1925 Dodge Rubber Suspension Parts: A Complete Guide

Restoring a 1925 Dodge requires careful attention to the rubber suspension parts. These components are critical for ride quality, safety, and preserving the vehicle's authenticity. This guide covers the types of rubber parts needed, how to find correct replacements, and practical advice for buying.

What Rubber Suspension Parts Are Needed?

A 1925 Dodge, likely a Dodge Brothers model, uses rubber in several suspension points to isolate vibration and allow controlled movement. The main areas are the spring bushings, shackle bushings, and motor mounts.

Front Suspension Components

The front axle on a 1925 Dodge typically uses leaf springs. Each spring eye has a rubber bushing where it attaches to the frame or spring perch. Additionally, the spring shackles (at the front or rear of the spring) have rubber bushings that allow the spring to flex. These bushings are often cylindrical and may be split or solid. Measure the inner diameter (ID) for the bolt, outer diameter (OD) for the housing, and length to ensure a snug fit.

Rear Suspension Components

Rear leaf springs also use rubber bushings at the spring eyes and shackles. Some 1925 Dodges have a torque tube rear axle, but the spring attachment points remain similar. The rear spring bushings are often larger than front ones. Check your specific model (e.g., 1925 Dodge Brothers Series 116 or 126) for differences.

Other Rubber Parts

• Motor Mounts: These are rubber blocks or biscuits that support the engine and transmission. For a flathead four-cylinder or six-cylinder (depending on model), motor mounts may be simple rubber pads between the engine and frame. Reproduction sets are available.
• Body Mounts: The body sits on the frame using rubber isolators. These are often square or rectangular pads that prevent metal-to-metal contact. They can deteriorate and need replacement to reduce noise and vibration.
• Steering Linkage: The drag link and tie rod ends may have rubber dust boots or bushings. While not strictly suspension, they affect steering feel.

Finding Correct Parts for a 1925 Dodge

Many aftermarket suppliers offer rubber suspension parts for 1920s Mopars. The key is matching the part to your exact model, as brake types, spring widths, and bolt sizes vary.

Original vs. Reproduction

Original rubber parts are rare and often hard or cracked. Reproductions are the practical choice. They are made from modern rubber compounds that last longer than the originals. Some suppliers offer "exact original" formulations, while others use polyurethane for durability. For a faithful restoration, look for parts made from natural rubber or a modern equivalent that matches the appearance.

Material Considerations

• Natural rubber: Good for authenticity, but less durable in ozone and UV. Best for show cars.
• Neoprene or EPDM: More resistant to oil, weather, and aging. Suitable for drivers.
• Polyurethane: Very durable but stiffer, increasing vibration transmission. Use only if you prioritize longevity over ride comfort.

Measurement and Fitment

Always remove old parts and measure them before ordering. A 1925 Dodge may have different bushing sizes than later models. Common sizes for front spring bushings are 1/2" ID, 1" OD, and 2" long, but verify. Many suppliers list dimensions in catalogs. If unsure, call them with your measurements.

Practical Buying Tips

Where to Find Parts

Specialist vendors like Roberts Motor Parts, Antique Auto Parts, or Snyder's Antique Auto Parts carry Dodge Brothers suspension rubber. They often organize catalogues by model year. You can also check with the Dodge Brothers Club for referrals. Avoid generic "universal" bushings unless you can confirm fitment.

Cost and Quality

Rubber suspension parts are relatively inexpensive. A set of spring bushings costs $20–$50, while motor mounts may be $15–$30 each. Prioritize parts that come with a guarantee of fitment. Some suppliers sell complete kits for the front and rear springs, which simplify ordering.

Installation Notes

Replacing bushings often requires pressing out old metal sleeves and installing new ones. Use a press or large vise to avoid damaging the rubber. Lubricate with soapy water or silicone grease to ease installation. For motor mounts, ensure the engine is safely supported before removing old mounts.

Recommendation

For a 1925 Dodge that will be driven regularly, choose reproduction rubber parts made from neoprene or EPDM. They offer a good balance of authenticity and durability. Buy from a dedicated antique auto parts supplier who can confirm fitment for your specific model. If restoring to show condition, use natural rubber reproduction parts for correct appearance. Always double-check dimensions against original parts. With proper selection and installation, your 1925 Dodge's suspension will perform reliably for years.