The car has been working fine. It sat for about 6 months, the battery went bad. I put a new battery in it, and now the speedo stays on 0 and the car stays in one gear. Check engine lite is on. I put both speed sensors in and it is still the same. It worked perfect when I parked it. Thank you.
SOURCE: the transmission wont shift out of 2nd gear again.
i can answer part of your question. the front wheel speed sensors are for abs and trac control only. these will not affect the speedo your problem is some where else. sorry i have not had this prob yet good luck. you could have to replace the rear wheel speed sensor again. they are not that good. and after market are even worse.
SOURCE: Transmission won't shift properly (2 wd ) speedo does not work
Its weird but I had a fuse blow out awhile back that is the same fuse that works the cab lights when you open the doors. When this fuse went out it also made it shift odd and hard when it did shift. Since it is only intermittent in your case, It may just be a weak fuse.
SOURCE: Speedometer goes to 0 and trans downshifts
There are 2 speed sensors on the transaxle. One is for vehicle speed and one is for trans output shaft speed. My guess is that you replaced the one for output shaft speed.
Nissan Scope Technician- 10 years with Nissan
SOURCE: I HAVE A 1999 DODGE STATUS - TRANSMISSION PROBLEMS
your ultradrive transmisson has failed, and your stuck in limp home mode. you have 3rd and reverse.
that was the good news.
the bad is that you need a new transmission. the ultradrive transmissions are very problematic. do a wikipedia.org search on chyrsler ultradrives and than write a really angry letter.
your not the only one that transmission has left of the side of the road
SOURCE: 2000 sonata check engine lite came on,
The output speed sensor is located on top of the transmission output shaft, this will send speed value to the transmission control module (TCM).
The vehicle speed sensor is installed on the differential of the transmission, and sends speed value to speed gauge on instrument cluster.
Check also IAC valve and look for vacuum leaks using an hand tool gauge(Vacuum Gauge and Fuel Pump Pressure).
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