LS3 Engine and Transmission for Sale: The Ultimate Guide for Enthusiasts and Buyers

ls3 engine and transmission for sale, The LS3 engine is one of the most celebrated powerplants in the automotive performance world. Developed by General Motors and released in 2008, this 6.2L V8 engine quickly gained recognition for its reliability, high output, and modification potential. It originally powered vehicles like the Chevrolet Corvette C6 and the fifth-generation Camaro SS.

Table of Contents

1. Introduction to the LS3 Engine

2. LS3 Transmission Options

3. Why Buy an LS3 Engine and Transmission Combo?

4. Where to Find LS3 Engines and Transmissions for Sale

5. Pricing Breakdown: LS3 Engine and Transmission Cost

6. LS3 Swap Guide: Compatibility and Installation

7. Performance Upgrades for the LS3

8. LS3 vs Other LS Engines (LS1, LS2, LS6, LS7, LSA)

9. Tips for Buying Used vs. New LS3 Engines

10. Top Retailers for LS3 Engine and Transmission Combos

11. Shipping, Warranty, and Return Policies

12. LS3 Engine Build Projects (Popular Builds)

13. Common Problems and Maintenance Tips

14. Customer Reviews and Success Stories

15. Frequently Asked Questions (FAQs)

16. Conclusion

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1. Introduction to the LS3 Engine

The LS3 engine is one of the most celebrated powerplants in the automotive performance world. Developed by General Motors and released in 2008, this 6.2L V8 engine quickly gained recognition for its reliability, high output, and modification potential. It originally powered vehicles like the Chevrolet Corvette C6 and the fifth-generation Camaro SS.

Key Specifications:

• Displacement: 6.2 Liters

• Horsepower: 430 – 436 HP (stock)

• Torque: 424 – 428 lb-ft (stock)

• Compression Ratio: 10.7:1

• Redline: ~6600 RPM

• Fuel Delivery: Sequential Fuel Injection

• Block Material: Aluminum

• Head Material: Aluminum

Its compact design and compatibility with many vehicles make it a top choice for restomod, hot rod, and muscle car projects.

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2. LS3 Transmission Options

When looking for an LS3 engine for sale, buyers typically also seek a compatible transmission. Below are the common transmissions paired with LS3 engines:

Automatic Options

• 6L80E (6-Speed Auto):
  Electronically controlled, durable, and perfect for daily-driven or street/strip builds.

• 4L70E (4-Speed Auto):
  Used in some LS3 applications, but less common than 6L80E.

Manual Options

• Tremec TR6060 (6-Speed Manual):
  Found in the Camaro SS and Corvette. Known for smooth shifts and high torque capacity.

• T-56 Magnum (Aftermarket):
  A popular swap option offering better gearing and durability.

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3. Why Buy an LS3 Engine and Transmission Combo?

Purchasing an LS3 engine with a matching transmission is often more cost-effective and ensures compatibility. Here’s why many buyers prefer bundles:

• Matched ECU and Harness: Most combos come with tuned ECUs and complete wiring.

• Transmission Fitment: Correct bellhousing, sensors, torque converter/clutch.

• Better Deal: Buying together is often cheaper than sourcing separately.

• Less Guesswork: Ensures drivetrain compatibility.

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4. Where to Find LS3 Engines and Transmissions for Sale

Looking for an LS3 engine and transmission for sale? Here are your best sources:

Online Retailers

• JEGS

  • Offers crate engines, wiring harnesses, and packages

  • https://www.jegs.com

• Summit Racing

  • Known for full engine and drivetrain combos

  • https://www.summitracing.com

• Chevrolet Performance Parts

  • OEM LS3 crate engine and transmission kits

  • https://www.chevrolet.com/performance-parts

Specialized Shops

• Pace Performance

  • LS3 crate engine combos, standalone ECUs

  • https://www.paceperformance.com

• Texas Speed & Performance

  • Performance-tuned LS3 long blocks and accessories

  • https://www.texas-speed.com

Marketplaces

• eBay Motors

  • Wide range of used and new LS3s, with buyer protection

• Facebook Marketplace / Craigslist

  • Great for local deals, but buyer beware!

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5. Pricing Breakdown: LS3 Engine and Transmission Cost

Here’s a general idea of what you can expect to pay:

Prices vary depending on mileage, condition, included parts (ECU, harness, sensors), and vendor.

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6. LS3 Swap Guide: Compatibility and Installation

Popular Vehicles for LS3 Swaps:

• Chevy S10 / Blazer

• Mazda RX-7 (FD/FC)

• BMW E36 / E46

• Nissan 240SX (S13/S14)

• Classic Camaros, Novas, Chevelles

• Pontiac GTO / Firebird

• Miata V8 swaps

Installation Tips

• Motor Mounts: Use swap-specific kits

• Transmission Tunnel Clearance: Check shifter placement

• ECU Tuning: A must for proper functionality

• Driveshaft Modification: Often required

• Cooling System: Upgrade radiator and fan setup

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7. Performance Upgrades for the LS3

Even in stock form, the LS3 is impressive, but here are common upgrades:

• Camshaft Swap: Boosts HP by 40–100+ HP

• Intake Manifold: FAST LSXR 102mm for better airflow

• Headers & Exhaust: Long-tube headers increase power

• Cold Air Intake: Improves response and efficiency

• Supercharger or Turbo Kits: Capable of 700+ WHP

• ECU Tune: Essential after mods

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8. LS3 vs Other LS Engines

The LS3 strikes a balance between affordability, power, and availability.

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9. Tips for Buying Used vs. New LS3 Engines

New LS3 Engine:

• Pros: Full warranty, zero wear, cleaner install

• Cons: Expensive upfront

Used LS3 Engine:

• Pros: Cheaper, more accessible

• Cons: Unknown history, potential hidden damage

Check for:

• Oil leaks

• Compression test results

• VIN verification

• Mileage records

• Visual wear/damage

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10. Top Retailers for LS3 Engine and Transmission Combos

Here are some trusted retailers:

1. GM Performance Parts – https://www.chevrolet.com/performance

2. Pace Performance – https://www.paceperformance.com

3. Summit Racing – https://www.summitracing.com

4. JEGS Performance – https://www.jegs.com

5. Texas Speed – https://www.texas-speed.com

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11. Shipping, Warranty, and Return Policies

Shipping:
Expect freight shipping costs of $300–$800 depending on location and weight.

Warranty:

• New crate engines often include 24-month or 50,000-mile warranties.

• Used engines may come with 30–90-day limited warranties.

Return Policies:
Most companies charge restocking fees. Always read the fine print before purchase.

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12. LS3 Engine Build Projects (Popular Builds)

1. 1969 Camaro LS3 Swap – Modern power in a classic shell

2. BMW E36 Drift Car – Lightweight chassis with V8 grunt

3. Miata LS3 Swap – Ultimate sleeper build

4. Off-Road LS3 Buggy – Power and durability in harsh conditions

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13. Common Problems and Maintenance Tips

While LS3s are highly reliable, here are a few things to watch:

• Valve Spring Wear: Replace with performance springs if upgrading cam

• Rear Main Seal Leaks: Common in higher-mileage units

• AFM (Active Fuel Management): Not present in LS3 (a plus)

• Spark Plug Fouling: Occasional with aggressive tuning

Maintenance Schedule:

• Oil Change: Every 3,000–5,000 miles (use synthetic)

• Coolant: Flush every 2 years

• Spark Plugs: Replace every 60k miles

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14. Customer Reviews and Success Stories

John M. – California:
“Swapped an LS3 into my 240SX – the power is incredible, and daily drivability is still perfect.”

Elena R. – Texas:
“Bought an LS3/6L80E combo from Pace Performance. Install was straightforward, and the support was fantastic.”