☰
GET A QUOTE

Q: It won't shift out of second gear.

asked by on February 06, 2017

A friend of my ex changed some thing to do with the oil. Now my car won't shift out of 2nf gear. My ex thinks the guy must have knock a wire loose that goes to the transmission sensors. Were do we start looking.
My car has an automatic transmission.

Recommended Services

Transmission Speed Sensor Replacement Get a Quote
Or For Any Other Auto Repairs Get a Quote

It sounds like you may have a failing speed sensor. The transmission speed sensor is a magnetic sensor that provides this information, allowing the transmission to shift smoothly. The sensor counts the internal number of revolutions of the transmission and transmits that information to the transmission control unit, where the data is used to determine the rotational speed. As the rotation increases, the control unit directs the changing of gears. When this is not working properly, this may cause the transmission to shift erratically or in some cases not at all. I would recommend having an expert from YourMechanic come to your location to take the car for a test drive to more specifically determine the cause for this.

Chevrolet
Blazer
V6-4.3L
2000
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

Where do you find the vehicle identification number?
Each car is required to have a unique vehicle identification number (VIN). This is used for a very wide range of things, from your title to your insurance and much more. Without a VIN, your car is likely not insurable....
Read more
Gas not getting to the engine
An easy way to test for a failed fuel pump is to have a certified mechanic, like one from YourMechanic, spray a little bit of starting fluid into the vehicles intake and try to start it again. If this starts...
Read more
Grinding noise on startup on a 2001 Vauxhall Corsa
Most of the time it is a bad starter motor. Starter motors are cheap. Take it off, put another starter motor and hope that the noise goes away. If the noise continues, a lot of times it's the flywheel teeth...
Read more
Engine turns, but won't start
The 5.4L Triton V8's are notorious for the ignition coils failing. There is a TSB out concerning these coils. The engine uses a coil over plug setup and while you can read out faults to see which coils have cylinders...
Read more
Car stalls at steady higher speeds
Hello there, a few common faults would cause your 1971 Chevrolet El Camino to stall out like this. The most common would be the carburetor (https://www.yourmechanic.com/services/carburetor-replacement), battery (https://www.yourmechanic.com/services/battery-replacement), alternator (https://www.yourmechanic.com/services/alternator-replacement) or the fuel pump (https://www.yourmechanic.com/services/fuel-pump-replacement). I recommend having a qualified...
Read more
Check engine light
Wow... 329,000 miles on your Chevrolet Uplander. Assuming you are still on your original engine, that is a long lived vehicle. If your Check Engine Light is on, YourMechanic will use an electronic code retrieval tool to download the DTC's...
Read more
Have a 2010 Camaro V6 with error code P0008. 2010 Chevrolet Camaro V6
Hi there. P0008 is a generic OBD-II code (https://www.yourmechanic.com/article/p0008-obd-ii-trouble-code-engine-positions-system-performance-bank-1-by-paul-lancette) indicating an issue with the engine control module (ECM) detecting a variation in the mechanical timing between the crankshaft and bank 1 camshaft. The ECM uses sensors to detect the position...
Read more
I have a vibration in the center of my truck from 55-80 mph
If the driveshaft was rebuilt, I would first check to be sure that the shaft is balanced AND true. The biggest problem though is identifying a facility with the appropriate CALIBRATED equipment and knowledgeable staff. If you can identify a...
Read more
I schedule an appointment for front passenger wheel bearings but what if its driver side once you all get here will that be extra
If you scheduled to have the right bearing to be replaced then this means you already have a diagnosis from someone else and when the mechanic shows up to install the bearing they will install the bearing as instructed by...
Read more

Related articles

A Buyer’s Guide to the 2012 Chevrolet Impala
A A true classic, the 2012 Chevrolet Impala may not have all of the latest high-tech features of other sedans on the market, but it is a tried-and-true model with lots of room, plenty of comfortable features, and a large...
Read more
The Best Used Cars to Buy If You're a General Contractor
If If you're a general contractor, you probably aren’t in the market for a used car. More likely, you’re looking for a pickup truck, because you need to haul equipment and supplies to various job sites. Most contractors will likely...
Read more
How to Buy a Classic Chevy
For experienced car collectors and rookies alike, owning a classic Chevy is a rite of passage. There are multiple decades and styles in which Chevrolet made popular cars. Many of these cars then had a devout following in the years...
Read more

Browse other content

Maintenance
Cars
Cities
Estimates