Welcome to 603 Auto Salvage, We Sell Quality Used Auto Parts at Affordable prices.
Here’s a problem you didn’t see coming: when a 5.7 HEMI engine and transmission start failing together, everything changes instantly.
Your HEMI engine throws a rod. While diagnosing, the mechanic mentions your transmission’s been slipping. Or the transmission fails catastrophically, taking the torque converter—and possibly engine components—with it. Suddenly you’re not replacing one part. You’re facing two major systems, and the cost calculation just got complicated.
Most salvage yards sell engines. Or transmissions. Making you coordinate between multiple sellers, verify compatibility, hope the pieces actually work together, and pray nothing got missed in the compatibility matrix.
There’s another way.
Complete powertrain packages—5.7 HEMI engine and transmission pulled together from the same donor vehicle—eliminate guesswork. They’ve already proven they work together. The wiring matches. The electronics communicate. The flex plate bolts up. Everything’s been tested as a unit, not theoretical individual components that should theoretically mate correctly.
At 603 Auto Salvage, we understand powertrain failures rarely stop at one component. When we source donor vehicles, we preserve that proven compatibility for builders who need both pieces.
Chrysler reintroduced the HEMI name in 2003, creating instant nostalgia wrapped in modern engineering:
Generation III HEMI (2003-2008): Displacement: 5.7 liters (345 cubic inches) Configuration: V8 with hemispherical combustion chambers Construction: Aluminum block, aluminum heads Output: 340-350 hp depending on application Torque: 375-390 lb-ft Technology: Variable valve timing, multi-displacement system (MDS)
Generation III Updated (2009-2024): Displacement: 5.7 liters (345 cubic inches) Configuration: V8 with hemispherical combustion chambers Output: 360-395 hp depending on tuning and application Torque: 390-410 lb-ft Features: Improved VVT, active intake manifold, enhanced MDS
This engine powers Rams, Chargers, Challengers, Durangos, Grand Cherokees—a broad spectrum of Chrysler performance and utility vehicles. That diversity creates options but demands precision matching for successful swaps or replacements.
Understanding factory combinations prevents expensive mistakes:
545RFE (5-Speed Automatic):
Used in: Early Ram trucks, Durangos, Grand Cherokees
Characteristics: Adequate for moderate duty, can handle mild HEMI power
Limitations: Not ideal for towing or high-performance applications
Availability: Common in salvage yards
65RFE (6-Speed Automatic):
Used in: Later Ram trucks, heavier-duty applications
Characteristics: Stronger than 545RFE, better towing capability
Gear ratios: Improved efficiency and towing performance
Availability: Increasingly common
66RFE (6-Speed Automatic):
Used in: Heavy-duty Ram applications, 2500/3500 trucks
Characteristics: Strongest automatic, handles significant power and torque
Applications: Best for towing, performance builds, heavy use
Availability: Less common but highly sought
68RFE (8-Speed Automatic):
Used in: Modern Rams, Chargers, Challengers (2014+)
Characteristics: Excellent efficiency, smooth shifting, strong design
Technology: Most advanced transmission in the lineup
Availability: Growing but newer units cost more
Manual Transmissions:
T56/TR6060: Performance applications (Challenger, Charger)
NV3500/NV4500: Truck applications (older Rams)
Availability: Rare and expensive
Getting the right transmission matters. More gears don’t always mean better for your application. Heavy towing prefers the 66RFE’s strength over the 68RFE’s efficiency. Performance swaps want 6-speed manuals when available.
Actual pricing ranges for complete 5.7 HEMI engine-and-transmission combinations versus buying the components separately.
| Source | Price Range | Shipping | Warranty | Availability |
|---|---|---|---|---|
| Dealership (New Engine + New Transmission) | $12,000–$18,000+ | Included | 2–3 years | Order: 2–6 weeks |
| Separate Engine + Separate Transmission (Different Sellers) | $5,200–$11,800 total | $600–$1,200 | 30–90 days each | Varies by seller |
| Complete Package from Same Donor (603 Auto Salvage) | $4,600–$9,300 total | $400–$800 | 30–90 days | In stock or 3–10 days |
| High-Mileage Complete Packages (180k–260k mi) | $4,200–$5,800 (engine+trans) / $5,800–$7,200 (with electronics) | $400–$800 | 30–60 days | Frequent |
| Medium-Mileage Complete Packages (120k–180k mi) | $7,200–$9,400 (engine+trans) / $9,400–$11,800 (with electronics) | $400–$800 | 30–90 days | Regular |
| Low-Mileage Complete Packages (Under 120k mi) | $11,800–$14,500 (engine+trans) / $14,500–$17,500 (with electronics) | $400–$800 | 60–90 days | Limited |
Builders choosing HEMI swaps face complex compatibility matrices:
Wiring Integration: Modern HEMIs use sophisticated computers managing engine and transmission together. Separate sourcing risks mismatched electronics requiring expensive standalone systems or complex rewiring. Packages include matched ECM and TCM programming.
Flex Plate and Converter Compatibility: Flex plates vary between applications. Torque converters come in different stall speeds and bolt patterns. Getting mismatched components means custom work or replacement parts. Packages include the correct flex plate and converter already proven together.
Sensor and Wiring Matches: Different transmission years use different sensors, speed sensors, pressure sensors. The engine computer expects specific signals. Packages preserve that communication chain intact.
Accessory Drive Considerations: Transmission cooler lines, dipstick configurations, starter positioning—details that matter during installation. Complete packages include these details sorted.
Proven Operation History: Perhaps most importantly, these combinations ran together in actual vehicles. No theoretical compatibility—actual proven function under real conditions.
For professional builders, complete 5.7 HEMI engine and transmission packages reduce installation time by 30-40% compared to sourcing separate components. For DIY swaps, they eliminate the single biggest cause of project failure: incompatible components.
When you purchase HEMI engine and transmission combinations from us:
Engine Assembly: Complete 5.7 HEMI with all internals, timing components, valve covers, oil pan, intake manifold, fuel system, ignition system, all accessories mounted and ready.
Transmission Assembly: Complete transmission with torque converter (automatic) or pressure plate and flywheel (manual), all internals, valve body, solenoids, sensors, cooler lines and fittings.
Electronics Package: Engine control module (ECM), transmission control module (TCM) when separate, complete engine wiring harness, complete transmission wiring harness, all sensors with connectors, throttle body and pedal assembly.
Mechanical Connections: Flex plate (automatic) or flywheel (manual) correct for the specific combination, torque converter matched to transmission and engine, all mounting hardware and brackets, transmission cooler lines when applicable.
Documentation: Source vehicle identification with photos, verified mileage from donor vehicle odometer, compression test results on engine when performed, transmission fluid condition assessment, warranty terms clearly explained for both components.
This completeness means your installer receives a proven system rather than individual components requiring compatibility verification and adaptation.
Understanding failure modes helps set realistic expectations:
MDS Lifter Failures: Multi-displacement system lifters fail prematurely in some engines, causing ticking noises, misfires, and eventual catastrophic damage. Repair involves removing cylinder heads—expensive labor. Combined with other issues, replacement often makes more sense than repair.
Cam and Lifter Wear: Some production runs experienced accelerated camshaft and lifter wear. Symptoms include ticking, poor performance, metal in oil. Requires complete disassembly to repair properly.
Transmission Fluid Breakdown: Chrysler automatics need regular fluid changes. Neglected service leads to clutch pack failure, valve body issues, solenoid problems. Failed transmissions sometimes damage flex plates, torque converters, or even crankshafts.
Exhaust Manifold Bolt Failures: Exhaust manifold bolts break frequently on HEMIs. While not an engine failure itself, broken bolts indicate age and potential other issues. Repair involves drilling out broken bolts—adding time and cost.
Cooling System Failures Leading to Overheating: Failed water pumps, thermostats, or radiators cause overheating that damages head gaskets or warps heads. Once overheating occurs, transmission temperatures often spike too, potentially damaging transmission internals.
These failures sometimes affect both engine and transmission, making complete replacement more economical than attempting individual component repair.
Shopping for engine-transmission combinations requires different evaluation:
Matched Mileage Verification: Engine and transmission should have the same mileage from the same donor vehicle. Verify through odometer photos and documentation. Mismatched mileage suggests components from different vehicles—losing the compatibility advantage.
Fluid Condition Assessment: Engine oil should be clean without metal particles. Transmission fluid should be red to brown, not burnt black. Burnt fluid or metal debris indicates problems ahead.
Compression and Leak-Down Testing: Engine compression should measure consistently across all cylinders. Leak-down tests reveal valve and ring condition more accurately than compression alone.
Transmission Shift Quality: If the donor vehicle was driven before removal, shift quality provides insight. Smooth shifts indicate healthy transmission. Harsh or delayed shifts suggest internal wear.
Electronic System Verification: Verify engine control module and transmission control module came together from same vehicle. Mismatched electronics cause communication errors and functionality problems.
Complete Assembly Verification: Packages should include all connection points: wiring harnesses, cooler lines, mounting brackets, bell housing bolts, all sensors, throttle bodies, fuel system components. Missing pieces cost time and money.
Source Vehicle History: Understand why the donor entered salvage. Collision damage typically leaves powertrains perfect. Mechanical failures need detailed investigation. Flood vehicles require extreme caution despite attractive pricing.
Classic Truck Resto-Mods: Builders swapping modern HEMI power into classic trucks prefer complete packages. Compatibility is proven. Installation is streamlined. Modern performance meets classic aesthetics.
Failed Transmission Leading to Engine Replacement: Sometimes transmission failures damage engines through contamination or mechanical stress. Replacing both simultaneously prevents installing a good engine behind a questionable transmission.
Performance Builds: Serious performance applications require strong transmissions behind powerful engines. Complete packages ensure strength matches power output from the start.
Commercial Applications: Work trucks needing both components replaced prefer complete packages to minimize downtime. Proven compatibility means faster return to revenue generation.
Project Completions: Builders who started projects with engines only, then realized transmission needs, often return for matched transmissions or complete packages for their next build.
Vermont restoration shop: “We build resto-mod trucks. Sourcing complete HEMI packages from 603 Auto Salvage cut our parts hunting time by 60%. Engines and transmissions work together perfectly because they already did in their donor vehicles. For professional shops, time is money. These packages save both.”
New Hampshire custom builder: “Put together a 1969 Power Wagon with modern HEMI drivetrain. Got a complete package—engine, 66RFE transmission, all electronics. Installation took two weeks instead of the two months we budgeted. Truck makes 390 horsepower and tows 10,000 pounds like nothing. Best decision we made was buying the complete system.”
Maine commercial fleet: “We run older Ram trucks. When both engine and transmission failed on our 2008 model at 287,000 miles, we needed a complete solution fast. 603 Auto Salvage had what we needed. Truck was back generating revenue within a week. Cost us half what dealer quoted for just the engine alone.”
Professional installation requires specific considerations:
Mounting and Alignment: Engine mounts and transmission mounts must align properly. Custom applications need precise positioning. Professional fabrication ensures proper geometry.
Cooling System Design: Both engine and transmission need adequate cooling. Transmission coolers should be separate from radiators for optimal function. Lines must be properly routed and secured.
Exhaust System Planning: HEMI exhaust requires proper planning for flow and clearance. Headers improve performance but complicate installation. Complete exhaust systems need fabrication or adaptation.
Electrical Integration: Wiring harnesses need proper routing away from heat and moving components. Ground points must be adequate and properly located. Throttle pedal assembly requires mounting and connection.
Computer Programming: ECM and TCM may need reprogramming for specific applications. Some swaps work with donor vehicle programming. Others need custom tuning for optimal function.
Driveshaft Modifications: Transmission output shaft and rear axle input must mate correctly. Custom driveshafts handle length and yoke differences. Professional driveline shops ensure proper balance and function.
Complete packages simplify compatibility but installation still requires skill and proper planning.
Why buy both together if only one failed? If your engine failed at 200,000 miles, your transmission has 200,000 miles too. Installing a good engine behind a high-mileage transmission risks needing another major service soon. Complete replacement provides longer trouble-free operation.
Can I mix generations? Generally no. Electronics, sensors, and computers differ between generations. Stick with generation-matched combinations for reliable function.
What about manual transmissions? We source them when available but they’re rare. Most HEMI vehicles use automatics. Manual combinations command premium pricing due to scarcity and enthusiast demand.
Do packages include transfer cases for 4WD? Sometimes. When donor vehicles had 4WD, we often include transfer cases. Verify what’s included in specific packages.
How heavy are complete packages? The engine and transmission together weigh 700-900 pounds typically. Plan for proper lifting equipment and secure transport.
Can packages ship? Yes, though freight costs reflect weight. Local pickup saves money. Regional delivery is available—call for quotes.
What warranty applies? Most packages include 30-90 day coverage on internal mechanical components of both engine and transmission. Terms vary by specific package age and mileage.
Identify Your Needs: Determine your specific application. Year, make, model for replacements. Desired configuration for swaps. Be specific about requirements.
Contact Us: Call 603-392-7313 during business hours or visit our contact page. Describe your project or vehicle. We’ll check inventory for suitable complete packages.
Verify Compatibility: We’ll discuss whether specific packages match your needs. For swaps, we’ll explain what additional components you’ll need. For replacements, we verify VIN compatibility.
Inspect Available Units: Visit to inspect packages personally. See what you’re getting. Ask questions. Verify that the condition meets your standards.
Arrange Transport: Complete packages require substantial transport capability. We can arrange local delivery. Freight shipping is available for distance.
Professional Installation: These are complex installations requiring proper equipment and expertise. Budget accordingly for professional work unless you have significant experience and tools.
Preserved Compatibility: We source and store engines with transmissions together, maintaining proven factory combinations rather than mixing components.
Complete Electronics: Packages include matched computers and wiring that communicate properly—eliminating compatibility headaches.
Documentation: Complete donor vehicle history, mileage verification, condition assessment, warranty terms—everything documented clearly.
Professional Builder Focus: We understand swap requirements and compatibility concerns. Our staff has experience helping builders select appropriate packages.
Fair Pricing: Complete packages cost less than buying components separately while providing better value through proven compatibility.
Local Access: Inspect packages before purchase. Verify quality and completeness. Build confidence through direct examination.
HEMI swaps and powertrain replacements represent significant projects. Complete packages simplify the single most challenging aspect: compatibility.
Whether you’re building a dream truck, replacing failed components, or creating a performance machine, proven engine-transmission combinations eliminate guesswork while saving money.
We’re here when you’re ready to discuss options. Real inventory. Honest information. Fair pricing.
Your complete powertrain solution starts here at 603 Auto Salvage’s inventory and our main 603 Auto Salvage homepage. 603-392-7313. Let’s talk about what you’re building.
Looking for more automotive solutions? Explore our other resources:
114 Auto Salvage,
LightSpeedBid, and
Rapid Cash for Junk Cars
for additional services and savings.
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