PONTIAC GRANDAM85 Automatic Transmission Calais 400-03705A TH125 2.3L

( Manufacturer Part Number: GRANDAM85 ), ( Part Type: Transmission ), ( Genuine Oem: Yes ), ( Ipn: 400-03705a ), ( Descriptionpartcondition: 2.3l At Please Ask Questions Or If You Need Pictures )

Review PONTIAC Automatic Transmission 2.3l Calais fits 1990–1991

The Pontiac 400-03705A automatic transmission is a TH125 2.3L unit designed specifically for select Pontiac vehicles from the 1990 and 1991 model years, including the Calais. This transmission is a crucial component of the powertrain system, responsible for smoothly transferring engine power to the drive wheels.

The TH125 transmission is a 4-speed automatic design, which offers a balance between fuel efficiency and performance. Its 2.3-liter capacity makes it well-suited for smaller engines and provides an ideal ratio spread for everyday driving. The transmission features a torque converter that ensures seamless power transfer and a lock-up clutch for improved efficiency at highway speeds.

Each gear in the TH125 transmission is precisely machined for durability and precision. The gears are made of high-strength materials and are designed to handle the demands of everyday driving. The transmission also includes a planetary gear set, which provides a wide range of gear ratios and helps maintain a consistent engine speed during acceleration and deceleration.

The TH125 transmission is also equipped with a valve body that controls the fluid pressure and flow within the transmission. This valve body includes various solenoids and orifices that regulate the transmission's shift patterns, ensuring smooth and timely gear changes. The transmission's shift quality is further enhanced by its electronic control system, which monitors various engine and vehicle parameters to optimize shift points and improve overall performance.

Additionally, the TH125 transmission features a heavy-duty torque converter clutch, which helps minimize power loss during shifting and improves overall efficiency. The transmission's cooling system is also designed to effectively dissipate heat, ensuring the transmission operates at optimal temperatures and extends its lifespan.

The Pontiac 400-03705A TH125 2.3L automatic transmission is a reliable and robust component that is essential for the proper functioning of your 1990 or 1991 Pontiac Calais. Its precise engineering, durable construction, and advanced features make it an excellent choice for those seeking optimal performance and longevity from their vehicle's powertrain system.

Buying a Pontiac 400-03705A TH125 2.3L 90-91 Calais automatic transmission involves considering its potential advantages and disadvantages. Here are some points to help make an informed decision.

1. Availability: These transmissions are quite common and easily available on the used market, which can result in lower prices compared to newer or less common transmissions.

2. Fitment: This transmission is designed specifically for the 90-91 Calais, ensuring a perfect fit and minimal modifications may be required for installation.

3. Relatively Simple Design: The TH125 transmission is a proven design, which can make repairs and maintenance easier compared to more complex systems.

1. Age: This transmission is over 30 years old, which may lead to potential issues such as worn-out components and the need for repairs or rebuilds.

2. Limited Performance: As a 2.3L engine transmission, it may not provide the best performance for high-performance applications or significant power upgrades.

3. Fuel Efficiency: Older transmissions like the TH125 are not known for their fuel efficiency, which may lead to higher fuel costs over time.

When considering buying a Pontiac 400-03705A TH125 2.3L 90-91 Calais automatic transmission, it's essential to weigh the advantages and disadvantages carefully. The availability and perfect fit are significant advantages, but the age and potential issues that come with it should not be overlooked. If the vehicle is primarily for daily driving and low-mileage applications, this transmission could be a suitable choice. However, for high-performance applications or significant power upgrades, it may be worth considering a more modern and robust transmission.

If you plan to use the vehicle for daily driving and don't intend to make significant power upgrades, a used Pontiac 400-03705A TH125 2.3L 90-91 Calais automatic transmission could be a cost-effective option. Ensure to have it inspected by a professional mechanic to assess its condition and identify any potential issues before purchasing. If you require better performance or fuel efficiency, consider a more modern and robust transmission.

Details:

CALAIS 90-91 AT; TH125, 4-138 2.3L.

part #: grandam85 prices

• $359.87-$639.99

specifications complmanu:

• for makes: Pontiac
• for years: 1990-1991
• mpn: Grandam85
• part type: Transmission
• genuine oem: Yes
• ipn: 400-03705a
• descriptionpartcondition: 2.3l At Please Ask Questions Or If You Need Pictures

general complmanu:

• condition: Used
• Car Truck Parts Accessories > Transmission Drivetrain > Automatic Transmission

shipping complmanu:

• type: Fixed
• cost: $0.00
• service: Flat Rate Freight
• class: Freight

payments complmanu:

• wallet: Paypal
• other
• credit card: Mastercard

offer complmanu:

• started: February 25, 2026
• sold: 0
• quantity: 1
• best offers: True
• availability: In Stock
• options: Ship-to-home

seller complmanu:

• city: Greensburg, Indiana
• # reviews: 12945
• rating: 99.0%

returns complmanu:

• policy: No Returns

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