USED TRANSMISSION FOR SALE
1989 GMC Truck-1500 Transmission
TH400 3-Speed Automatic | 4x2 | Fitment Verification Required
Looking for a replacement transmission for your 1989 GMC Truck-1500? Automart Auto Parts can help you check used TH400 automatic transmission options for your truck.
Share your full VIN, ZIP code and available transmission details so our team can help verify compatibility, check availability and provide a quote before you order
Quick Specifications
Key details for the 1989 GMC Truck-1500 TH400 transmission.
How to Identify the Correct GMC Truck-1500 Transmission
The TH400, also known as the Turbo-Hydramatic 400 or THM400, is a three-speed automatic transmission. For your 1989 GMC Truck-1500, the supplied details are TH400 automatic and 4×2.
Before choosing a used transmission, confirm the original unit and its compatibility with your truck. The transmission identification tag or casting information, engine configuration and drivetrain can help narrow down the correct replacement.
What to Check | Details |
|---|---|
Vehicle Year | 1989 |
Make & Model | GMC Truck-1500 Series |
Transmission | TH400 / THM400 |
Transmission Type | 3-Speed Automatic |
Drivetrain | 4×2 |
Identification | Check original transmission tag or casting |
Before Ordering | Confirm compatibility with your vehicle |
Fitment note: Do not rely on the year and transmission name alone. Confirm the original transmission, mounting and connection details, and vehicle configuration before ordering.
Signs You May Need a Replacement Transmission
These symptoms may indicate transmission trouble. A professional diagnosis can help determine whether repair or replacement is appropriate.
Delayed Engagement
A delay when shifting into Drive or Reverse can indicate a transmission, fluid-pressure, or control-system problem.
Warning Lights
Warning lights or transmission-related fault codes can point to sensor, electrical, or internal issues.
Shuddering or Unusual Noises
Vibration, whining, or inconsistent acceleration may indicate a transmission or drivetrain problem.
Loss of Power or Slipping
If engine revs rise without a matching increase in speed, arrange a prompt vehicle inspection.
Why Choose Automart Auto Parts?
Get help identifying a suitable used transmission and understanding the available options before making a decision.
Multiple Warehouse Sourcing
Check used transmission options sourced through multiple warehouses. Availability depends on the exact vehicle application.
VIN-Based Fitment Assistance
Use your VIN, engine details, and transmission code to help verify the correct application for your Subaru Forester.
Clear Availability and Shipping Details
Review the quoted price, unit condition information, availability, and shipping options before deciding to proceed.
How It Works
Three simple steps to help identify a compatible replacement transmission for your 2015 Subaru Forester.
Share Your Details
Provide the full VIN, vehicle year, engine details, ZIP code, and transmission identification if available.
We Verify Fitment
We help check the transmission type, drivetrain configuration, and identifying details against the vehicle application.
Review Your Quote
Review the available matching option, quoted price, condition information, and shipping details before proceeding.
Need a 1989 GMC Truck-1500 Transmission?
Looking for a used TH400 automatic transmission for your GMC 4×2 truck?
Share your full VIN and ZIP code, along with any available transmission identification, so Automart Auto Parts can help check compatibility, availability and pricing.
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