1. Automatic Transmissions Products
  2. sku: 23229664595022782
  3. GM 10405540

GM 10405540 Auto Transmission Member Crossmember V8

fits model: Ls1, 4l60e, Camaro, Firebird, Cross. year: 1998–2002.

10405540 Gm 98-02 Ls1 V8 Camaro Firebird Auto 4l60e Transmission Cross Member Crossmember

( Brand: Gm ), ( Manufacturer Part Number: 10405540 ), ( Type: Automatic Transmission ), ( Vintage Part: Yes ), ( Country Of Origin: United States )

Review GM V8 Auto Transmission Member Crossmember fits CAMARO FIREBIRD CROSS LS1 4L60E 1998–2002

The **GM 10405540 98-02 LS1 V8 Camaro/Firebird 4L60E Transmission Crossmember** is a precision-engineered, high-strength steel component designed exclusively for General Motors iconic 1998 2002 Camaro and Firebird models equipped with the legendary **LS1 V8 engine** and the **4L60E automatic transmission**. This crossmember serves as the critical structural backbone between the transmission and the frame rails, ensuring optimal alignment, rigidity, and durability under the demanding forces of high-performance driving, towing, or aggressive acceleration. Crafted from heavy-duty, heat-treated steel, it is engineered to withstand the relentless stresses of daily use, heavy loads, and even the occasional off-road excursion, providing a robust foundation for the transmission tunnel while maintaining proper spacing for the driveshaft and exhaust components. The crossmember features precise machining and laser-cut tolerances to guarantee a seamless fit with the factory frame rails, eliminating gaps or misalignment that could lead to rattles, binding, or premature wear. Whether restoring a classic muscle car to its original glory or upgrading a modernized performance vehicle, this crossmember is an essential replacement part for those seeking reliability, authenticity, and long-term structural integrity. Its universal compatibility with both the Camaro and Firebird platforms makes it a versatile choice for enthusiasts looking to preserve the integrity of their vehicle s drivetrain while enhancing its overall robustness.

### **Pros and Cons of Buying a 1998-2002 GM LS1 V8 (Camaro/Firebird) with a 4L60E Transmission and Crossmember (Part # GM 10405540)**

#### **Pros**

1. **Strong Engine and Performance**

The LS1 is one of the most beloved V8 engines ever produced, known for its reliability, power, and durability. With proper maintenance, it can easily last 200,000 miles. The 5.7L (345 hp) version is a classic muscle car engine that offers strong performance, especially when paired with a manual transmission, but even with the 4L60E automatic, it remains a fun and capable drivetrain.

2. **Proven 4L60E Transmission**

The 4L60E is a robust automatic transmission that was widely used in GM vehicles of the era. While it has a reputation for being finicky, it is also well-documented and has a strong aftermarket support system. With proper care (fluid changes, valve body adjustments, and clutch replacements when needed), it can last well over 100,000 miles. Many owners successfully revive worn-out 4L60Es with rebuilds or upgrades.

3. **Aftermarket and Modification Potential**

The LS1 platform is one of the most mod-friendly engines ever made. You can easily upgrade components like the intake manifold, exhaust, camshafts, headers, and even forced induction (turbo/supercharger) with relative ease. The 4L60E also benefits from aftermarket upgrades like performance torque converters, valve body kits, and transmission coolers. This makes the car highly customizable for both street and track use.

4. **Classic Muscle Car Aesthetics and Driving Experience**

The 1998-2002 Camaro and Firebird (especially the SS models) are iconic American muscle cars with sharp styling, aggressive posturing, and a fun, engaging driving experience. The LS1 s power delivery and the 4L60E s smooth (when healthy) shifts make for an enjoyable ride, especially in a manual transmission version, though the automatic can still be very enjoyable with the right tuning.

5. **Parts Availability and Community Support**

The LS1 and 4L60E have been around for decades, meaning parts are widely available, both new and used. There is a large and active community of enthusiasts who share knowledge, modifications, and troubleshooting tips. This makes repairs and upgrades more accessible compared to newer or less common vehicles.

6. **Potential for High Resale Value (If Well-Maintained)**

While not as valuable as some classic muscle cars, a well-preserved LS1 Camaro or Firebird with a restored transmission can still hold its value, especially if it has a clean title and a solid maintenance history. Restomod versions (modernized but still classic) can even appreciate in value over time.

---

#### **Cons**

1. **Transmission Reliability Issues**

The 4L60E is notorious for its clutch and valve body problems, especially in high-mileage examples. Common issues include:

- **Slipping or hesitation** (often due to a worn clutch or valve body).

- **Delayed or rough shifts** (can be fixed with a valve body rebuild or replacement).

- **Leaking seals or fluid contamination** (requires regular fluid changes and inspections).

- **Torque converter issues** (can cause stalling or poor acceleration).

While these problems can be fixed, they add to the cost and effort of ownership, especially if the transmission is neglected.

2. **Electrical and Computer Glitches**

The 1998-2002 GM platform (especially the early LS1 models) is known for electrical quirks, including:

- **Random stalling or misfires** (often due to faulty sensors, wiring, or PCM issues).

- **Check Engine Lights (CEL) popping up** (common with oxygen sensors, MAF sensors, or vacuum leaks).

- **Transmission control module (TCM) failures** (can cause erratic shifting).

These issues can be frustrating and may require diagnostic work to pinpoint.

3. **Rust and Structural Concerns**

Many vehicles from this era (especially those driven in snowy or humid climates) suffer from rust, particularly in the:

- **Rocker panels**

- **Wheel wells**

- **Subframe and crossmember areas**

- **Floor pans**

Rust can weaken structural integrity, leading to costly repairs if not addressed early. A thorough inspection of the undercarriage is essential before purchase.

4. **Maintenance and Repair Costs**

While parts are cheap, labor costs can add up, especially if you don t have mechanical experience. Common maintenance items include:

- **Regular transmission fluid changes** (every 30K-60K miles to prevent clutch failure).

- **Spark plug and coil replacements** (every 30K-60K miles for the LS1).

- **Coolant and timing belt changes** (the LS1 uses an interference engine, so a timing belt failure can be catastrophic).

- **Suspension and brake upgrades** (stock components are basic and may need replacement).

If you re not hands-on, these costs can become significant over time.

5. **Fuel Economy and Modern Standards**

The LS1 V8 is not fuel-efficient by today s standards, averaging around **12-15 MPG in the city and 18-22 MPG on the highway**. This can be costly to operate, especially if you drive frequently. Additionally, modern emissions regulations may require modifications if you plan to keep the car on the road long-term.

6. **Potential for Hidden Problems**

Many LS1 Camaros/Firebirds from this era have been modified or abused, leading to:

- **Engine damage** (from overheating, oil starvation, or forced induction without proper support).

- **Transmission damage** (from neglect, incorrect fluid, or aggressive driving).

- **Suspension wear** (stock shocks and struts are not designed for aggressive driving).

A **pre-purchase inspection (PPI)** by a trusted mechanic is **highly recommended** to avoid buying a money pit.

7. **Depreciation and Insurance Costs**

While some LS1 cars hold value, others depreciate quickly, especially if they re not well-maintained. Insurance costs can also be higher than average due to the car s value and potential for expensive repairs.

---

### **Conclusion**

Buying a **1998-2002 GM LS1 V8 Camaro/Firebird with a 4L60E transmission** can be an exciting and rewarding experience if you re prepared for the challenges. The **LS1 is a fantastic engine** that rewards proper care with decades of reliable performance, and the **4L60E, while finicky, is fixable** with the right knowledge and effort. The **aftermarket support, mod potential, and classic muscle car appeal** make this a great choice for enthusiasts who enjoy working on their cars.

However, the **transmission reliability issues, electrical quirks, rust concerns, and maintenance costs** mean this is **not a plug-and-play purchase**. It requires **active ownership, budgeting for repairs, and a willingness to troubleshoot**. If you re looking for a **low-maintenance, modern vehicle**, this is not the right choice. But if you re a **mechanically inclined enthusiast** who enjoys restoring and modifying classic muscle cars, the **LS1 platform offers unmatched fun and potential**.

---

### **Recommendation**

1. **If You re Serious About Buying:**

- **Get a pre-purchase inspection (PPI) from a trusted LS1 specialist or transmission expert.**

- **Check for:**

- **Transmission fluid condition and clutch wear** (have a mechanic check for slipping or hesitation).

- **Engine compression and valve train health** (listen for knocking or unusual noises).

- **Rust in critical areas** (subframe, rocker panels, wheel wells).

- **Electrical system** (scan for codes, test sensors, and wiring).

- **Budget for:**

- **Transmission rebuild or upgrade** (if the clutch or valve body is worn).

- **Engine maintenance** (oil changes, spark plugs, coolant system).

- **Suspension and brake upgrades** (if stock components are worn).

- **Potential rust repairs** (especially if the car has been stored in harsh conditions).

2. **If You re Not Mechanically Inclined:**

- Consider a **restored or low-mileage example** with a **documented service history**.

- Look for **manual transmission models** (they re simpler and more reliable than automatics).

- Avoid **high-mileage examples without transmission history** (the 4L60E can be a ticking time bomb).

3. **Best Use Cases for This Car:**

- **Weekend project car** (if you enjoy working on it).

- **Track or drag racing** (with proper modifications).

- **Show car or restomod** (if you want a modernized but classic LS1).

- **Everyday driver (if well-maintained and budgeted for repairs).**

4. **Avoid If:**

- You want a **low-maintenance, modern vehicle**.

- You re not willing to **spend time and money on repairs**.

- The car has

Details:

Removed from a 98 Camaro z28 auto.

part #: 10405540 prices

  • $64.99-$80.00

specifications autotransmissionsgo:

  • for models: Ls1, 4l60e, Camaro, Firebird, Cross
  • for years: 1998-2002
  • brand: Gm
  • mpn: 10405540
  • type: Automatic Transmission
  • vintage part: Yes
  • country of origin: United States

general autotransmissionsgo:

  • Car Truck Parts Accessories > Transmission Drivetrain > Automatic Transmission
  • condition: Used

seller autotransmissionsgo:

  • # reviews: 1196
  • rating: 99.4%
  • city: Halfway, Oregon

returns autotransmissionsgo:

  • time: 30 Days
  • policy: Returns Accepted
  • paid by: Seller

shipping autotransmissionsgo:

  • class: Standard
  • cost: $15.00
  • carrier: USPS
  • transit: 7-11 Days
  • service: USPS Ground Advantage
  • type: Fixed

offer autotransmissionsgo:

  • sold: 0
  • started: March 20, 2026
  • quantity: 1
  • availability: In Stock
  • options: Ship-to-home

payments autotransmissionsgo:

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  • credit card: Visa
  • wallet: Google-pay
for models: ls1, 4l60e, camaro, firebird, cross, for years: 1998-2002, type: automatic transmission, vintage part: yes, country of origin: united states,
category: auto parts > car truck parts accessories > transmission drivetrain > automatic transmission, sku: 23229664595022782,
Gm 10405540 Is Similar To:
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2 offers $64.99–$80.00 USD
  • New. Offer #1 priced at $80.00 + $17.45 shipping estimate = $97.45* total. Made by GM Genuine Parts, it ensures quality and compatibility with specific GM vehicle models. The product is a remanufactured rear GM Genuine Parts Suspension Subframe Crossmember designed for all-wheel drive vehicles.+$17.45 shipping
  • Used. Offer #2 priced at $64.99 + $25.00 shipping estimate = $89.99* total. THIS DOES NOT WORK WITH V6 or T56 Models! Overall good used shape. For Use with the 4L60E Trans and a LS1 Engine.+$25.00 shipping

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