If you are a car enthusiast, then you know that there are many different types of transmissions available on the market. Two of the most popular ones are the TH350 and the TH400. In this blog post, we will compare the pros and cons of each transmission so that you can make an informed decision about which one is right for you.
TH400 vs TH350 Table
TH-350 Was a Low-Torque Transmission
TH-400 Was a High-Torque Transmission
It Was Used in Light Cars
It Was Used in Heavy Cars
The Vacuum Modulator Is Located on the Right Front of the Transmission
The Vacuum Modulator Is Situated at the Right Rear of the Transmission
It is Designed to Handle 450 hp/TQ and Even Could Handle More Than That in Reality.
It is Designed to Handle 800 hp/TQ and Even Could Handle More Than That in Reality.
Transmission Fluid Capacity 4 Quarts
It Comes With Three Tail Shaft Lengths
Designed to Work Without Throttle Valve or Kickdown Cable
A Fluid Called Amsoil Atf Works With a Turbo 400
TH 350 Transmission Nearly All GM, Rear-Wheel-Drive Cars and Trucks Through 1984
Excellent Choice for Weekend Bracket Racers, High-Powered Street Cars, and Mud Trucks
The main difference between th350 and th400 transmissions is that th350 transmissions use a reverse-cut planetary gearset while th400 transmissions utilize a forward-cut spiral gearset. The type of gear set used in each transmission has an impact on its overall performance and efficiency.
Both the TH350 and TH400 are three-speed automatic transmissions with overdrive capability. The TH350 is also slightly lighter than its counterpart due to differences in its construction materials.
The th350 transmission uses an aluminum alloy case and steel gears while the th400 has an iron case and hardened steel gears. Both transmissions are rated for up to 600 hp and 700 lb-ft of torque, but the TH400 is better suited for high-performance applications.
If you are looking for an efficient and reliable transmission that can handle high horsepower and torque loads, then the TH400 is the right choice for you. However, if you are looking for a transmission that is lighter in weight and less expensive, then the TH350 might be better suited to your needs.
Th400 Transmission Short Review
The GM TH400 transmission is a three-speed automatic transmission that was designed to be placed behind the engine in rear-wheel drive vehicles. It has been rated at 450 ft. lbs. of torque, but some aftermarket designs have been modified to provide more torque. It is a heavy-duty transmission that can handle high horsepower and torque loads.
The TH400 transmission uses a forward-cut spiral gearset which provides more efficient power transfer and better performance than the reverse-cut planetary gearset used in the TH350 transmission. It also has an iron case and hardened steel gears, making it tougher and more durable than its counterpart.
The TH400 transmission is a reliable and durable choice for many different types of vehicles, including heavy-duty trucks and high-performance sports cars. It is not as common today as it was in the past because newer transmissions have been developed that provide better fuel economy and efficiency at lower prices than older designs like this one (such as the TH700R-T).
- Aluminum and iron construction.
- It weighs 135 pounds without fluid.
- Bell housing integrated into the transmission.
- The gear of the TH400 is- First gear: 2.48:1, Reverse gear: 2.08:1, and third gear is an even 1 to 1.
- It comes with three tail shaft lengths.
- A fluid called Amsoil ATF works with a Turbo 400.
TH350 Transmissions Short Review
The TH350 transmission is a three-speed automatic transmission that was first made by General Motors in 1968. It was designed to be compact, strong, and versatile, and it was made to work well with both Chevrolet and Buick cars. It is a relatively lightweight transmission, weighing in at around 95 pounds without fluid.
The TH350 transmission uses a reverse-cut planetary gearset which makes it less efficient than the forward-cut spiral gearset used in the TH400 transmission. It also has an aluminum alloy case and steel gears, making it less durable than its counterpart. However, the TH350 transmission is still a reliable and durable choice for many different types of vehicles.
The TH350 transmission is less expensive than the TH400 transmission, making it a good choice for budget-minded buyers. It also has a smaller footprint than the TH400, making it a good option for vehicles with limited space.
- 350 TH is shorter in size and easier to adapt in smaller-bodied cars.
- It weighs about 125 pounds.
- A TH350 will start operating at a loss of about 35hp.
- TH350 can take the modification for racing too.
- TH350 has an aluminum case.
- A vacuum modulator is attached to the valve body in the right rear.
- The later versions of the electric TH350C have a four-wire plug connection on the left side.
- TH350 can work with engines rated at more than 400hp.
- Ratios on the TH350 are first gear, 2.52:1; second gear, 1.52:1; third gear, 1.00:1; reverse, 1.93:1.
Who is the Winner?
Both the TH350 and the TH400 transmissions are good choices for high-performance vehicles. However, the TH400 transmission is a better option for vehicles that need to handle high horsepower and torque loads. It is also more durable than the TH350 transmission. If you are looking for an efficient and reliable transmission that can handle high horsepower and torque loads, then the TH400 transmission is the best choice.
If you’re looking for a good, basic automatic transmission that will work well with both Chevrolet and Buick cars, then the TH350 transmission is a good option. It is less expensive than the TH400 transmission and it has a smaller footprint than its counterpart. However, the TH350 transmission does not handle high horsepower or torque loads as well as the TH400 transmission.
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