1997 grand cherokee orvis 44r3 tranny, no 4th gear up shift, pressure overdrive piston is 65 psi, would the overdrive solenoid partially stuck open would cause loss of pressure? Air pressured overdrive piston no audible leaks, can see it applying overdrive clutch pack. Rebuilt transmission due to torque convertor failing, had metal in pan but transmission had all four gears before.

/D OFF Indicator The instrument cluster receives the O/D OFF indicator status from the PCM over the communication network. When the overdrive function is turned off, the PCM sends a command to the instrument cluster to turn on the O/D OFF indicator. When a powertrain concern exists, the O/D OFF indicator flashes amber and illuminates green when overdrive is selected off. What code ? you said solenoid A -
P0750 SSA SSA Solenoid Circuit Failure SSA circuit failed to provide voltage drop across solenoid. Circuit open or shorted or PCM driver failure during on-board diagnostic. No reverse gear (short) or no 4th gear (open). MIL on. Go To Pinpoint Test A . P0751 SSA SSA Functional Failure (Stuck Off) Mechanical or hydraulic failure of the shift solenoid. Not all gears present, MIL on. Refer to Diagnosis By Symptom . P0752 SSA SSA Functional Failure (Stuck On) Mechanical or hydraulic failure of the shift solenoid. Not all gears present, MIL on. Refer to Diagnosis By Symptom . P0753 SSA SSA Solenoid Circuit Failure SSA circuit failed to provide voltage drop across solenoid. Circuit open or shorted or PCM driver failure during on-board diagnostic. No reverse gear (short) or no 4th gear (open). MIL off. Go To Pinpoint Test A . Could be a wiring problem . Did you check the solenoid A wiring circuit back to the PCM ?

Please try jeepforum.com it may be of some help

if its not shifting make sure fluids are full (I'm sure you did) im just saying is your speed sensor on trany pluged in , and your throttle return cable from trany to fuel return hooked up

There are several things that could cause that.
> Replacement transmission not equipped with overdrive
> Overdrive solenoid in replacement transmission defective
> Overdrive control circuits damaged or loose pins or connections.
> Gear shift linkage or cable out of adjustment
> Transmission range sensor malfunction or out of adjustment

Since you have a computer-controlled transmission, it would be better to ask the onboard computer that question....you will probably get a much more definitive answer.

Are you sure its stuck in first gear, Its probably in second.. It sounds like a stuck or open shift solenoid in the tranny (4L60E hydra-matic). Depending on the year and type of tranny this was a default setting to either only second or only third gear, should some electrical or transmission hydraulic fault occur. Another common problem for that year is a faulty ignition switch at the key cylinder. It will fail and not send power to the tranny (thus not powering up the shift solenoids). The default (or limp home mode) is when both solenoids are commanded off. They will be both commanded off in second gear (even when the tranny is operating normally).

problebly an inside leaking off olie by the overdrive bearing

Sounds like you need a solenoid pack to start, and possibly a service. If the tranny is not slipping, the solenoid pack is stuck and not tell it to shift up. Could possibly be a TCM, but not as likely.

HI, It may seem obvious, but sometimes overlooked.... have you checked the oil level, as low oil can cause some strange things to happen! My 96 4 liter would be reluctant to move sometimes, but after I topped it up, it has been fine.

I had a shifting problem. The car would start in the wrong gear and shift at wrong times. I repaced the governor postion sensor and tranny fluid and the problem has been fixed for several years. Did you replace the tranny fluid?

I just had to replace the gov solenoid and sensor in trans.Would do same thing ,feel like someone shifted to neutral.