My speed odometor works sometime and sometimes it dose not can you help me

4L65E 4-speed (2003-2007 need rebuilt or replace

The blower wheel is plastic and sometime bends enough to strike the case. The speed resistor for the fan motor may be open also.

I think you have an engine speed sensor fault. its not reading the engine speed or the motion speed. needs these two to change speed and ( gear). one is connected to the abs unit and the other is on the engine. usually if they both go its down to the gear box ecu. you can check if you have it on a ecu reader. will have fault codes or not be read at all.

transmission code trouble somethings on transmission problem possibly solenoid or computer ecu

dose the trans act up at the same time the speedo cuts out if soo you definatly have either an intermittent speed sensor problem of wiring in the speed sensor circuit. speen sensor is located on the extension housing of the transmission (2wd) ot back of transfer case (4x4)

check and see if your cruise control still works your problem probably lays with in a speed sensor you have an output vehicle speed sensor that can cause the problem and i say a vehicle speed sensor because you didnt say anything in reference to having a abs ight on on your dash if you do have that as well you could possibly need a wheel speed sensor as well but i would lean more towards vehicle speed sensor output sensor

Check first if the they can do something about the sensor without replacing it but if they need to replace it do so and I can assure you it will work.

I’m happy to assist further over the phone at https://www.6ya.com/expert/ramy_d9e7ebea3891f482

yes it will

Take out your gages under the dash and send them out to get fixed they are speed operated. What most likely happend is the dial in back the odometer is stripped.

I had this exact problem on my old focus. Its nothing to worry about and its not expensive. Your car has a speed senser underneath the gearbox and a common fault on these cars is for the gearbox to slightly drip oil. When the oil drips it drips right on top of the senser and blocks the speed readings.
The good thing about this is your milage on your car wont go up when the speedo stops working, so when you come to sell it!!!!!!! you get my point.
to fix this problem it cost about £20 if you do it yourself.