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Discussion Starter #1
Limp mode speed sensor fix

One of the common problems with our transmissions is the input and output sensors that go bad

When the input sensor goes bad your car will only drive in 2nd gear, this is also known as limp mode

When the output sensor goes your speedometer will not work

Both sensors are on the driver's side of the transmission and require a 1" deepwall socket to remove, you may also need some extensions to reach them

Here are the part numbers for both:

Mopar 4800878 Input Speed Sensor
Mopar 4800879 Output Speed Sensor

If you buy them form the dealer expect to pay about $50.00 for the pair, many have bought from www.oem-car-parts.com or local auto parts stores and found them much cheaper

One word of advice, if you have one bad sensor spend the extra money and replace them both, well worth the extra $$ to avoid having to crawl under the car again if the second one fails

here's a pic of the sensor location

 

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Woober Goobers!
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50,122 Posts
And what are the actual code numbers.
 
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