fits make: Plymouth. year: 1958.

( Manufacturer Part Number: 1859577 ), ( Part Type: Bracket ), ( Country Of Origin: United States )
The **Plymouth 1859577 1958-1960 Transmission Alternator Motor Mount** is a meticulously engineered, high-quality replacement part designed to restore both the structural integrity and performance of classic Plymouth vehicles from the late 1950s and early 1960s. This mounting bracket serves as a critical link between the transmission and the engine, ensuring precise alignment and reducing unwanted vibration, which is essential for maintaining smooth operation and longevity in these iconic muscle cars and family sedans. Crafted from durable, heat-treated steel, this bracket is built to withstand the demands of daily driving, high-performance applications, and the rigors of restoration projects, offering a perfect fit for models like the Plymouth Belvedere, Savoy, and Valiant. The design incorporates precise machining to match the original specifications, guaranteeing a seamless integration with the transmission housing and alternator assembly while minimizing clearance issues that could lead to premature wear or failure. Whether you're restoring a vintage Plymouth to showroom condition or upgrading an existing vehicle for enhanced reliability, this mounting bracket is an indispensable component that bridges functionality and heritage, ensuring your classic stays on the road with confidence and character.
### **Pros and Cons of Buying a Plymouth 1958-1960 Chrysler Mounting Bracket (Part #1859577) for Transmission/Alternator/Motor Mount Applications**
#### **Overview**
The **Plymouth 1958-1960 Chrysler mounting bracket (part #1859577)** is a versatile aftermarket component designed to support the transmission, alternator, or engine mounts in certain Chrysler-based vehicles from that era. It is often sought after for restoration projects, classic car builds, or as a replacement for worn or missing factory brackets. Below is a detailed breakdown of its advantages and disadvantages.
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### **Pros**
1. **Compatibility with Multiple Applications**
- This bracket is designed to work with **transmission crossmembers, alternator mounts, and engine mounts** in **1958-1960 Plymouths, DeSotos, and Dodge hardtops** (especially those using the **A-57, A-68, or A-72 transmissions**).
- It can be adapted for **aftermarket setups**, such as **spider alternators, custom engine mounts, or heavy-duty transmission supports**, making it a flexible choice for builders.
2. **Durability and Strength**
- The bracket is typically made from **heavy-gauge steel**, which provides **structural integrity** for supporting transmission weight and absorbing engine vibrations.
- It is designed to **distribute load evenly**, reducing stress on the vehicle s frame and suspension.
3. **Ease of Installation**
- Many aftermarket versions come **pre-drilled or with clear installation instructions**, simplifying the fitting process for DIY mechanics.
- It often **replaces multiple factory brackets**, reducing the need for additional parts.
4. **Cost-Effective Alternative to Factory Parts**
- Original factory brackets can be **difficult to source** due to age and rarity, making aftermarket alternatives like this one a **budget-friendly option**.
- Purchasing a single bracket is often **cheaper than buying a full crossmember or engine mount assembly**.
5. **Supports Restoration and Customization**
- Restorers appreciate its **period-correct appearance** when used in classic builds.
- It can be **painted or polished** to match the vehicle s finish, blending seamlessly into a restored or modified car.
6. **Widely Available from Specialty Suppliers**
- Many **classic car parts dealers, eBay sellers, and aftermarket manufacturers** (such as **Eggleston, Holley, or custom fabricators**) offer this part.
- Some sellers provide **custom machining** to fit specific vehicle configurations.
7. **Reduces Vibration and Noise**
- Properly installed, it helps **minimize transmission rattle, engine vibration, and drivetrain noise**, improving ride quality.
8. **Backward and Forward Compatibility**
- While primarily designed for **1958-1960 models**, some versions may work on **early 1961-1962 Chryslers** with minor modifications.
- It can be **adapted for non-Chrysler applications** (e.g., some Ford or GM vehicles) with the right mounting points.
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### **Cons**
1. **Limited Original Equipment Manufacturer (OEM) Fitment**
- The **1958-1960 Plymouth bracket may not fit perfectly** on non-Plymouth Chryslers (e.g., **Imperials, New Yorkers, or early 1960s models**) without **custom modifications**.
- Some **hardtop models** may require **additional spacers or welds** for proper alignment.
2. **Potential for Poor Quality Control in Aftermarket Parts**
- **Cheaply made or poorly machined brackets** can **warp, crack, or fail under load**, especially if subjected to **aggressive driving or heavy loads**.
- Always **inspect for weld quality, straightness, and material thickness** before purchasing.
3. **May Require Additional Modifications**
- Some installations demand **custom welding, drilling, or machining** to ensure a **secure fit**, which may not be ideal for **non-mechanically inclined buyers**.
- **Alternator or transmission mounts** may need **additional brackets or spacers** for proper alignment.
4. **Not Universal Specific to Certain Engines/Transmissions**
- While versatile, it is **not a one-size-fits-all solution**. For example:- **A-57 transmission** mounts may differ from **A-68 or A-72** setups.
- **V8 vs. straight-six engine** applications may require **different spacing**.
- Always **verify compatibility** with your specific vehicle s drivetrain.
5. **Potential for Rust and Corrosion in Older Stock Parts**
- If purchasing a **used or salvage bracket**, there is a risk of **hidden rust or structural weakness**, which could compromise safety.
- **Newly manufactured brackets** should be **rust-proofed** (e.g., with **powder coating or galvanization**).
6. **Limited Availability of Exact Replicas**
- Some **specialty suppliers may discontinue** this part over time, making it **harder to find replacements** in the future.
- **Custom fabrication** may be necessary if the original part becomes unavailable.
7. **May Not Improve Performance Only Structural Support**
- This bracket **does not enhance power or efficiency**; it is purely a **support and stability component**.
- If you need **better vibration damping**, you may still require **additional rubber bushings or isolation mounts**.
8. **Potential for Incorrect Installation Leading to Damage**
- **Improperly installed brackets** can **damage the transmission, alternator, or frame rails**.
- **Over-tightening bolts** can strip threads or warp the bracket.
- **Under-tightening** can lead to **looseness and failure under load**.
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### **Conclusion**
The **Plymouth 1958-1960 Chrysler mounting bracket (part #1859577)** is a **practical and cost-effective solution** for supporting transmissions, alternators, and engine mounts in **classic Chrysler vehicles** from that era. Its **versatility, durability, and ease of installation** make it a **favorite among restorers and builders**, especially when original parts are scarce.
However, **careful consideration is required** due to **potential fitment issues, quality variations in aftermarket parts, and the need for modifications** in some cases. **Buyers should prioritize purchasing from reputable suppliers**, **verify compatibility with their specific vehicle**, and **follow proper installation procedures** to avoid issues.
For **restoration projects, custom builds, or as a replacement for worn factory brackets**, this part is **highly recommended** if sourced correctly. For **non-expert mechanics**, consulting with a **classic car specialist** before purchase is advisable to ensure the best fit and performance.
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### **Final Recommendation**
- **Buy it if:**- You are restoring or modifying a **1958-1960 Plymouth, DeSoto, or Dodge hardtop** with a **compatible drivetrain**.
- You need a **reliable, heavy-duty support bracket** for transmission, alternator, or engine mounts.
- You are willing to **verify fitment and possibly make minor modifications** for a perfect install.
- You prefer **aftermarket parts over rare OEM replacements**.
- **Avoid it if:**- Your vehicle is **not a 1958-1960 Chrysler** (or a closely compatible model), and no modifications are possible.
- You are purchasing from an **untrusted seller** with no quality guarantees.
- You lack **basic mechanical skills** to install it correctly.
- You need **performance upgrades** rather than just structural support.
**Best Practice:**- **Check with a classic car forum** (e.g., **ClassicCars.com, Hemmings, or a Plymouth-specific group**) for **specific fitment confirmation**.
- **Inspect the bracket for quality** before purchasing look for **straightness, weld integrity, and material thickness**.
- **Consider purchasing from a supplier with a return policy** in case of fitment issues.
- **Consult a mechanic or restorer** if unsure about installation.
For most **1958-1960 Chrysler enthusiasts**, this bracket is a **solid, well-worth-it purchase** when used correctly.
Shipping in US is free. 1958 59 60 Chrysle Plymouth Mounting Bracket Transmission Alternator Motor Mount.