Replaced transmission seal then on 2 different occasions going down highway at bout 65 to 70 miles hour transmission kept shifting btween overdrive n drive come to a stop n take off didnt do it again fluid level fine 1999 jeep grand cherokee laredo v6

Transmission not shifting into overdrive right.

Plymouth transmission wont shift into overdrive Questions ...

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Plymouth transmission wont shift into overdrive related problems. Ask your Plymouth transmission wont shift into ... My 2000 plymouth neon is stuck in park.

Dodge Neon Questions - my neon will not go into overdrive ...

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CarGurusSep 14, 2012 - my neon will not go into overdrive, it stays at 3500 rpms on highways - my neon does not ... 2003 Dodge Neon won't shift out of park 5 answers.

part2 replace the shift solenoid and speed switches in a ...

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Dodge Automatic Transmission Removal - Duration: 11:05. ...Dodge Neon Crushed By Mud Trucks ...

There are adjustments to be made on the outside linkage of your transmission. Take it to an honest transmission shop that won't tell you to replace the whole transmission.

run the fault codes
say whether it is auto or manual as both have over drives

check the tps ( throttle position sensor ). a bad tps causes transmission shift issues, bucking, jerking, idle surging, engine cutoff, hesitation on take off, surge while cruising down highway. am not saying this does the trick, but it is a good starting point. good-day !

Sounds like it's bypassing the overdrive seals. This is the solenoid package. I would put some transmission additive in first, this reconditions the seals. TranX, Lucus are both good.

Over Drive..... Generally speaking, overdrive (OD) is the highest gear in the transmission. Overdrive allows the engine to operate at a lower rpm for a given road speed. This allows the vehicle to achieve better fuel efficiency, and often quieter operation on the highway. When it is switched on, an automatic transmission can shift into overdrive mode after a certain speed is reached (usually 70+ km/h [43+ mph] depending on the load). When it is off, the automatic transmission shifting is limited to the lower gears. For an automatic transmission, it is almost always best to select overdrive and allow the transmission to control engagement of the overdrive. (It may be necessary to switch it off if the vehicle is being operated in a mountainous area or when towing a trailer.) With a manual transmission, overdrive should usually be selected when the average speed is above 70 km/h (approx. 43 mph).

check the vacum line on the transmission

transmission shift solenoid is stuck open this is a common vehicle issue in automatics and not particular to any make or model vehicle 15 dollar part and arm and leg for labor if taken in

heres an idea to try
take out the transmission filter and replace with new one make sure to take not of any metal debry in trans pan this indicates the trans had sheered its gears down and a trans rebuild is needed
the transfilter needs to be changed at a certain milage interval they can get clogged up
there is a kit you buy for your truck at any parts store
its an easy change hour of time unbolt trans pan unbolt trans filter and put new one in
kit comes with new seals less than an hour you can do it yourself

to overdrive you would feel a difference in shift badley if it was that something to keep in mind

The service light is a reminder for you to have the car serviced, it can be reset, and it will come on again in 5,000 miles or so.

The overdrive light may be caused by the wiring to the overdrive solenoid on the transmission, or the relay. Just be sure the wiring is ok before replacing the relay, or you can damage the new relay.

Bret
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