CHEVROLET SMITLEY-413-14-033 Transmission GMT-400

( Manufacturer Part Number: SMITLEY-413-14-033 ), ( Part Type: Transmission ), ( Country Of Origin: United States )

Review CHEVROLET Transmission fits 1998

The **Chevrolet Smiley 413-14-033 1998 GMT-400 Transmission** is a meticulously engineered, heavy-duty automatic transmission designed to deliver unmatched performance and reliability in full-size Chevrolet trucks and SUVs, particularly those built between the late 1990s and early 2000s. Part of General Motors legendary **4L60-E** family, this transmission is a refined evolution of the robust **4L60** series, featuring a **4-speed overdrive automatic** architecture with a **torque converter clutch (TCC)** for enhanced fuel efficiency and smooth shifting. Built with precision-cast aluminum housing and reinforced steel components, the 413-14-033 is engineered to withstand the demands of towing, hauling, and heavy-duty applications while maintaining durability over thousands of miles. The transmission incorporates a **planetary gearset** with a **forward clutch pack** and **reverse band**, ensuring crisp, responsive shifts even under high loads. Its **hydraulic valve body** is finely tuned to optimize shift quality, reducing jerkiness and improving overall drivability, while the **internal pump and torque converter** work in tandem to provide seamless power delivery. This transmission is a direct replacement for the stock unit found in the **1998 GMT-400**, offering OEM-level performance with the added benefit of upgraded internal components for longevity. Whether installed in a classic **Chevy Silverado, Suburban, or Tahoe**, this transmission is a testament to GM s engineering prowess, combining strength, efficiency, and adaptability to meet the needs of both daily drivers and performance enthusiasts.

### Pros and Cons of Buying a 1998 Chevrolet GMC GMT-400 Transmission (Part Number: 1998 Smiley-413-14-033)

1. **Proven Reliability** The GMT-400 transmission, particularly the 4L60-E or 4L65 variants (common in this era), is a robust heavy-duty transmission designed for trucks and SUVs. When properly maintained, it can last for hundreds of thousands of miles, making it a solid choice for high-torque applications like towing or hauling.

2. **Widely Available Parts and Support** Due to its popularity in full-size trucks (Chevy Silverado, GMC Sierra, etc.), finding replacement parts, rebuild kits, and labor is relatively straightforward. Dealerships, independent shops, and online retailers stock components for this transmission.

3. **Durability for Heavy-Duty Use** The GMT-400 is built to handle demanding workloads, including towing heavy trailers or driving off-road. Its robust construction and strong clutch packs make it suitable for applications where lighter transmissions might fail.

4. **Compatibility with Classic Trucks** If you re restoring or modifying a classic GMC or Chevrolet truck from the late '90s or early 2000s, this transmission is a direct fit, ensuring seamless integration with the drivetrain.

5. **Potential for Long-Term Cost Savings** If the transmission is in good condition or can be rebuilt affordably, replacing a failing transmission with a used or rebuilt GMT-400 can be cheaper than installing a brand-new transmission (e.g., a modern 10-speed or 9-speed).

6. **Aftermarket Support** There are aftermarket upgrades available, such as stronger clutch packs, modified valve bodies, or performance fluid options, which can extend the transmission s lifespan or improve performance.

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1. **Age and Wear** A 1998 transmission, even if well-maintained, is nearly 25 years old. Internal components like bushings, seals, and synchronizers may be worn out, leading to potential leaks, slipping, or rough shifting. A thorough inspection or rebuild is often necessary before purchasing.

2. **Potential for Hidden Damage** Without a detailed inspection or transmission fluid analysis, it s difficult to know the true condition of the internal components. Issues like worn clutches, damaged bearings, or internal leaks may not be immediately obvious.

3. **Maintenance Requirements** The GMT-400 requires regular fluid changes (every 30,000 60,000 miles) with the correct fluid (typically Dexron III or a high-performance alternative like Mopar Synthetic or ACDelco Dexron VI). Neglecting maintenance can lead to premature failure.

4. **Shift Linkage and Solenoid Issues** Older transmissions may suffer from worn shift linkages, faulty solenoids, or failing torque converters. These issues can cause erratic shifting, delayed engagement, or complete failure to shift.

5. **Rebuild Costs** If the transmission is beyond minor repairs, a full rebuild can be expensive (typically $1,500 $3,000 or more, depending on labor rates and parts). This cost must be factored into the decision to purchase.

6. **Electronic Failures** Later models of the GMT-400 (especially those with electronic controls) may have issues with PCM (Powertrain Control Module) compatibility or wiring problems, which can complicate diagnostics and repairs.

7. **Limited Modern Support** While parts are available, some specialized components (e.g., rare seals or bushings) may be harder to source than in newer transmissions. Additionally, modern diagnostic tools may not be as effective for troubleshooting older electronic issues.

8. **Potential for Overhauling the Entire Drivetrain** If the transmission is paired with an aging engine or drivetrain components (e.g., a worn flywheel, damaged flexplate, or failing rear axle), addressing the transmission may only be part of the solution. A full drivetrain overhaul could be required.

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Buying a used 1998 Chevrolet/GMC GMT-400 transmission (part number 1998 Smiley-413-14-033) can be a cost-effective and reliable choice if you re working with a vehicle that requires a heavy-duty transmission. The GMT-400 is durable, widely supported, and capable of handling tough workloads when properly maintained. However, its age introduces risks of hidden damage, maintenance demands, and potential repair costs. The key to success lies in thorough inspection, fluid analysis, and a willingness to invest in repairs or a rebuild if necessary.

If you re restoring a classic truck, modifying a vehicle for heavy towing, or replacing a failing transmission in a budget-conscious manner, the GMT-400 remains a viable option. However, if you re working with a modern vehicle or prioritize ease of repair and diagnostics, a newer transmission (e.g., a 6-speed or 10-speed) might be a more straightforward choice despite higher upfront costs.

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1. **Inspect Thoroughly** Before purchasing, have the transmission professionally inspected or flushed to check for internal wear, leaks, or fluid degradation. Request a fluid sample for analysis if possible.

2. **Consider a Rebuild** If the transmission is in mediocre condition, factor in the cost of a rebuild (including labor and parts) to ensure long-term reliability. A reputable shop can provide an estimate.

3. **Verify Compatibility** Ensure the transmission matches your vehicle s drivetrain specifications (e.g., bolt pattern, bellhousing, and torque converter compatibility).

4. **Budget for Maintenance** Plan for regular fluid changes and potential future repairs, as older transmissions require more attention than newer ones.

5. **Alternative Options** If the GMT-400 is too expensive or risky, explore used rebuilt transmissions from reputable sources (e.g., RockAuto, eBay Motors, or transmission specialists) or consider a newer transmission if your budget allows.

6. **Document the Purchase** Keep records of the inspection, fluid analysis, and any repairs to avoid future disputes or warranty issues.

**Final Verdict:** The 1998 GMT-400 transmission is a strong choice for those prioritizing durability and cost savings in a heavy-duty application, provided you re prepared for potential repairs and maintenance. For less demanding applications or newer vehicles, a more modern transmission may be the safer bet. Always weigh the risks and benefits based on your specific needs and budget.

Details:

Notes of the part or noticeable wear -, newer torque converter. Vehicle Year: 1998. Vehicle Make: Chevrolet. Some parts may be shipped in used/pre-owned boxes.

part #: smitley41314033 prices

• $13.99-$45.99

specifications autotransmissionsgo:

• for makes: Chevrolet
• for years: 1998
• mpn: Smitley-413-14-033
• part type: Transmission
• country of origin: United States

offer autotransmissionsgo:

• sold: 0
• quantity: 1
• options: Ship-to-home
• availability: In Stock
• started: May 19, 2026

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

general autotransmissionsgo:

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

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• rating: 99.9%
• # reviews: 2153
• city: Orrville, Ohio

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• cost: $269.10
• type: Fixed
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