Skip the auto shop - Our mechanics make house calls

Q: Transmission slipping

asked by on

I took my car to the dealership because it backfires after 20mph. The dealership says I need a new transmission. Do you agree with them?

The transmission was possibly putting some sort of increased load on the engine. You may want to have the fault codes read out of the engine and transmission. Volkswagen has a TSB out for an improper shift from 2-3 gear, which would be near the 20 MPH range. There is an updated software for the transmission to correct this, if this is the problem. However, the software level would need to be updated using the Volkswagen VAS system. You may want to enlist the help of an certified mechanic to inspect your gear slipping issue first before spending money on a transmission overhaul or replacement unit.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

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: What can i do to fix the problem with the malfunction indicator lamp ?

Hello, thank you for writing in. If there is a warning light illuminated on your dashboard, then the computer has detected an issue with the vehicle. To determine what that issue is, you must pull the diagnostic codes from the...

Q: Noise like a pulley squeak or rattling

Hi there. Quite often when you hear the rattle or squealing noise upon start up, but it goes away eventually; it is due to a loose serpentine or drive belt. This noise is also common with low power steering fluid....

Q: Cranks but doesn't start and also I don't see the rpm move when I try to start, what should I do? - 2002 Nissan Altima

Hello - I suspect your crankshaft position sensorhas failed. This sensor provides the ignition system with timing information - when to fire each spark plug. This sensor is also the trigger for the tachometer, since it is counting engine revolutions...

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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.