
3961573 Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $16.00 | Condition is New, GM 15-851 A/C compressor / Trans Spark Control relay 1970-76 GM USA made 3961573, shipping cost = $12.75 | ![]() |
![]() | $22.77 | Top Pick! Condition is New, 70-76 GM Transmission Control Spark A/C Compressor Relay NIEHOFF RL17, shipping cost = $6.07 | 99.8% |
![]() | $49.99 | Condition is New, 1970-75 GM Manual Transmission TCS Relay 350/396/454 GM # 3961573 , shipping cost = $6.99 | ![]() |
![]() | $55.00 | Condition is New, NOS GM #3961573 Transmission Spark Relay 71 - 75 Corvette Camaro Nova Impala NOS, shipping cost = $14.92 | ![]() |
![]() | $59.00 | Condition is New, Delco 15-851 Relay, shipping cost = $18.50 | 99.8% |
![]() | $234.56 | Condition is New, MAKE AN OFFER NOS GM 3961573 66-71 BUICK, 73-75 CHEVRELAY, shipping cost = $18.99 | 98.5% |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $20.00 | Condition is New other (see details), Niehoff Automotive Relay (Replaces #3961573) - For Select GM Models - NOS, shipping cost = $6.07 | 99.8% |
![]() | $13.99 | Top Pick! Condition is New other (see details), 70-76 GM Transmission Control Spark A/C Compressor Relay NIEHOFF AR114 RY16, shipping cost = $14.35 | 99.2% |
![]() | $30.00 | Condition is New other (see details), NOS GM Relay - 3961573, shipping cost = $40.00 | 100.0% |
![]() | $75.00 | Condition is New other (see details), 1970 - 1975 GM 3961573 MANUAL TRANSMISSION TCS RELAY CAMARO Z28 CORVETTE NOS, shipping cost = $18.24 | ![]() |
| photo | price | summary | rating |
|---|---|---|---|
![]() | $28.00 | Condition is Used, 1970-75 GM Manual Transmission TCS Relay 350/396/454 GM # 3961573 , shipping cost = $6.00 | 99.0% |
![]() | $39.00 | Condition is Used, Corvette OEM 1969 1977 Transmission TCS relay 4 Speed Muncie GM #3961573 camaro, FREE SHIPPING | 100.0% |
![]() | $43.99 | Condition is Used, Corvette OEM 1969 1977 Transmission TCS relay 4 Speed Muncie GM #3961573 camaro, FREE SHIPPING | 100.0% |
![]() | $47.33 | Condition is Used, Corvette OEM 1969 1977 Transmission TCS relay 4 Speed Muncie GM #3961573 camaro, FREE SHIPPING | 100.0% |
![]() | $45.95 | Condition is Used, GM #3961573 Transmission Spark Relay Corvette Camaro Nova Impala, shipping cost = $12.25 | 100.0% |

Introducing the Delco 3961573 TCS Relay, a crucial component for select 1970-1975 General Motors vehicles. This reliable and high-performing part is designed to replace the original TCS (Torque Control System) relay, ensuring optimal engine management and improved driving experience.
The Delco 3961573 TCS Relay is engineered to meet the stringent requirements of GM vehicles. It is manufactured using top-quality materials, ensuring durability and longevity. This relay is specifically designed to control the Torque Control System, which is responsible for managing fuel injection and ignition timing to optimize engine performance and improve fuel efficiency.
This Delco TCS Relay features a robust design, with a solid state construction that minimizes the risk of failure due to wear and tear. It is also designed to be compatible with the wiring and connectors found in select 1970-1975 GM vehicles, making installation straightforward and hassle-free.
The Delco 3961573 TCS Relay is easy to install, with clear and concise instructions included in the packaging. It is recommended to replace the old relay with a new one whenever performing regular vehicle maintenance or when experiencing issues with the Torque Control System.
By using the Delco 3961573 TCS Relay, you can restore the optimal performance of your select 1970-1975 GM vehicle. This reliable and high-quality part is the perfect solution for those seeking to improve the overall driving experience of their vehicle, while ensuring long-lasting and dependable engine management.
In summary, the Delco 3961573 TCS Relay is a must-have component for select 1970-1975 GM vehicles. Its robust design, ease of installation, and compatibility with original wiring and connectors make it an excellent choice for those seeking to restore the optimal performance of their vehicle. With the Delco 3961573 TCS Relay, you can enjoy improved engine management, enhanced fuel efficiency, and a better driving experience.
Delco 3961573 TCS Relay (GM for Select 1970-1975) - Pros, Cons, and Conclusion
The Delco 3961573 TCS Relay (GM for select 1970-1975) is a crucial component in the ignition system of certain General Motors vehicles. This relay controls the Torque Control System (TCS), which helps in improving the fuel efficiency and engine performance. In this analysis, we will discuss the advantages and disadvantages of buying this relay, followed by a conclusive recommendation.
Pros:1. Enhanced Fuel Efficiency: The Delco 3961573 TCS Relay plays a significant role in optimizing fuel consumption by controlling the TCS. A faulty relay can lead to the malfunctioning of the TCS, resulting in poor fuel efficiency and increased emissions.
2. Improved Engine Performance: The TCS is responsible for maintaining the engine at optimal performance levels. A functional TCS relay ensures that the engine operates efficiently, providing better acceleration and power output.
3. OEM Part: This relay is an original equipment manufacturer (OEM) part, meaning it is manufactured by the same company that originally supplied it for the vehicle. Using an OEM part guarantees a perfect fit and optimal performance.
4. Durability: Delco relays are known for their robustness and reliability. The Delco 3961573 TCS Relay is no exception, providing long-lasting performance and reducing the need for frequent replacements.
Cons:1. Cost: The Delco 3961573 TCS Relay may come with a higher price tag compared to aftermarket or used alternatives. However, the benefits of using an OEM part often outweigh the cost.
2. Availability: Depending on the location and availability, it might be challenging to find this specific part at local auto parts stores. Online shopping or contacting a dealership directly can help overcome this issue.
Conclusion:In conclusion, the Delco 3961573 TCS Relay (GM for select 1970-1975) is an essential component for maintaining optimal engine performance and fuel efficiency in these vehicles. While the cost may be a concern for some, the advantages of using an OEM part, such as enhanced fuel efficiency, improved engine performance, durability, and perfect fit, often outweigh the disadvantages. Therefore, it is recommended to invest in this high-quality, original equipment manufacturer part for the best results.
Details:
Delco tcs relay Gm# 3961573 for select Gm model's 1970-1975 see nos oem, timing control switch relay, 1970, 1971, 1972chevrolet: Bela air, nova, Monte Carlo, impala, caprice, Biscayne 1972, 1973 Chevrolet Chevalier 1973, 1974, 1975 Chevrolet: Malibu, corvette, Camry, el amino 1971 Oldsmobile 442, cutlass, other shipping options are available upon request including express.
specifications perfoelectric:
- for makes: Gm
- for years: 1970–1975
- brand: Delco
- mpn: 3961573
- type: Timing Control Switch Relay
- country of origin: United States
- california prop 65 warning: This Product Can Expose You To Chemicals, Which Are Known To The State Of California To Cause Cancer And Birth Defects Or Other Reproductive Harm.
shipping perfoelectric:
- service: usps ground advantage
- type: calculated
- class: standard
- transit: 3-9 days
- carrier: usps
offer perfoelectric:
- options: ship-to-home
- availability: in stock
- in stock #: 5
- best offers: true
- started: january 13, 2026
- sold #: 10
- prices: $13.99–$234.56
- item condition:
- New
- New other (see details)
- Used
general perfoelectric:
- category: Auto Parts > Electrical Components
payments perfoelectric:
- other
- wallet: apple-pay
- credit card: diners-club
seller perfoelectric:
- city: selah, washington
- rating: 100.0%
- # reviews: 232
returns perfoelectric:
- paid by: seller
- time: 30 days
- policy: returns accepted
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