Q: I might be having transmission issues but then i think it could be a engine problem.

asked by on

So i have recently received this truck for a graduation present. Before i have received it the truck had a bad transmission. We replaced the transmission however the "new" transmission we put in the truck came out of a 2004. Now the truck wont allow us to go over 40 mph because it will shut the engine down. What is going on???
My car has an automatic transmission.

Hello,

From what you describe it appears that whatever problem your vehicle may be experiencing has caused it to go into limp mode.

Limp mode is a precautionary mode where the power and speed of the vehicle are severely limited. It is activated when a major issue is detected in order to protect the vehicle’s components from sustaining possible damage.

Limp mode can be caused by a wide variety of issues including engine, transmission, mechanical and electrical issues.

You mention that the transmission was recently replaced with one from a different year.

I would first verify with a dealership or knowledgeable parts person that the transmission is in fact compatible with that vehicle, and if it is, then move on to verifying that the installation was properly carried out. Double check all harnesses, connectors, and mounts to make sure that there are not any issues.

If everything appears to be sound, then I would recommend having the vehicle inspected by a professional technician, as again, limp mode can be activated by a wide variety of issues.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. I might be having transmission issues but then i think it could be a engine problem.

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Minor skip when accelerating -1985 Chevrolet C10 Pickup

Hello, thanks for writing in. This sounds like an exhaust valve was adjusted too tight after the rebuild, causing combustion to leak past the exhaust valve into the exhaust itself. For an in-person diagnosis, a certified technician from YourMechanic can...

Q: Lurching,skipping while idle

Hello and thanks for writing in. It sounds like you may have a misfire of some kind that may be causing the shaking and lurching at idle. Engine misfires can be caused by many different problems and are generally caused...

Q: My car makes a grinding noise when shifting to reverse

The first thing to check is the transmission fluid level. If fluid level is okay, then the most likely problem causing a poor reverse engagement is low fluid pressure in the transmission. This could be caused by a worn pressure...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...