If you’re into hot rods or muscle cars, you probably know that the 700R4 transmission is one of the most popular choices for a rebuild. However, one of the most significant challenges you might face when installing a 700R4 is getting it to work without a computer. The good news is that it’s entirely possible to do so, and in this article, we’ll explain how to make a 700R4 work without a computer.
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What is 700R4 Transmission
The 700R4 is a four-speed automatic transmission developed by General Motors in the early 1980s. It was originally designed for use in trucks but was eventually used in a wide range of GM vehicles, including the Camaro, Corvette, and Impala.
The 700R4 has a unique overdrive gear that allows for improved fuel efficiency and reduced engine wear at highway speeds. However, this overdrive gear is controlled by a computer that monitors the engine’s speed, load, and throttle position.
Why Work Without a Computer?
While the computer control system in the 700R4 is reliable and effective, some car enthusiasts prefer to use a simpler, more old-school approach. They might want to avoid using a computer for aesthetic reasons or to simplify the wiring and other components in their car. Alternatively, they might have a car that wasn’t designed to work with a computer-controlled transmission, making it necessary to modify the transmission to work without it.
How to Make a 700R4 Work Without a Computer
The process of making a 700R4 work without a computer is not as complicated as you might think. Here’s what you need to do:
Install a manual valve body
The first step in modifying a 700R4 for non-computer use is to install a manual valve body. A manual valve body allows you to manually control the transmission’s shifts, eliminating the need for a computer-controlled shift mechanism.
Use a standalone controller
Next, you’ll need to install a standalone controller that can manage the transmission’s converter lockup and shift points. A standalone controller is a small, standalone computer that can be programmed to control various aspects of the transmission’s operation.
Install a lockup wiring kit
To control the torque converter lockup, you’ll need to install a lockup wiring kit. This kit will allow you to control the lockup using a switch on your dashboard.
Modify the speedometer
Finally, you’ll need to modify your car’s speedometer to work with the 700R4’s electronic speed sensor. You can either modify your existing speedometer or install an aftermarket speedometer that’s designed to work with electronic sensors.
Benefits of Modifying a 700R4 for Non-Computer Use
While modifying a 700R4 for non-computer use might seem like a lot of work, there are several benefits to doing so:
Simplified wiring: By eliminating the need for a computer-controlled transmission, you can simplify the wiring in your car and reduce the risk of electrical problems.
Improved reliability: Because you’re removing complex electronics from the transmission, you can improve its reliability and reduce the risk of failure.
Increased control: By using a manual valve body and standalone controller, you have more control over the transmission’s shifts and lockup, allowing you to fine-tune its performance to your liking.
FAQs
Here are some frequently asked questions about the making 700R4 Work without a computer –
Q: Do I need any special tools to modify a 700R4 for non-computer use?
A: Yes, you’ll need some specialized tools, including a torque wrench, a drill, and various electrical connectors.
Q: Can I still use the overdrive gear if I modify the 700R4 for non-computer use?
A: Yes, you can still use the overdrive gear if you modify the 700R4 for non-computer use. You’ll just need to manually control its operation.
Q: How long does it take to modify a 700R4 for non-computer use?
A: The time it takes to modify a 700R4 for non-computer use depends on your experience level and the complexity of the modifications you’re making. It could take anywhere from a few hours to a few days.
Q: What kind of standalone controller should I use?
A: There are several standalone controllers on the market designed specifically for use with the 700R4. Look for one that’s compatible with your car’s engine and transmission.
Q: How do I know if a 700R4 is right for my car?
A: A 700R4 is a good choice for many muscle cars and hot rods. However, it’s always best to consult with a professional to determine if it’s the right transmission for your car.
Q: Can I still use my car’s original shifter with a modified 700R4?
A: Yes, you can still use your car’s original shifter with a modified 700R4.
Q: Is it safe to modify a 700R4 for non-computer use?
A: As long as the modifications are done correctly, modifying a 700R4 for non-computer use is safe. However, it’s always best to consult with a professional to ensure that the modifications are done properly.
Conclusion
Modifying a 700R4 for non-computer use can be a challenging but rewarding process. If you know how to make a 700R4 work without a computer, you can simplify your car’s wiring, improve its reliability, and gain more control over its operation. While it might take some time and effort to modify a 700R4, the benefits are well worth it for car enthusiasts who want a simpler, more old-school approach to their transmission.
