Skip the auto shop - Our mechanics make house calls

Q: Transmission trouble shifting -1998 Plymouth Voyager

asked by on

98 Plymouth voyager se. 3.0L, 4 speed automatic transmission on the column. Having problem not shifting out of 1st. Some times gets to 2nt. Codes we went off of was P0700 and P1768. When drive for a little bit and play with it manually it will shift up. Then when slow down it abruptly down shifts to 2nt. Also just noticed the gear lights on dash(PRND3L) lightly flickering. Have replaced input/output spend sensors, the TCM, and TCC(shift solenoid). After all that still Having same problems.

My car has 110000 miles.
My car has an automatic transmission.

Hello. Try replacing the transmission control relay in main junction box. This is a possible cause of the code P1768. The P0700 code should not pertain to your vehicle and may be an erroneous code. I would try the relay first, and then clear codes and retest. You could also have a wire problem in the transmission harness. You can try disconnecting and reconnecting transmission harness connections to see if this helps. If it still has issues, then have a mechanic do a thorough diagnostic pinpoint test of code P1768.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: I have a 2000 honda civic EX and check engine light with D4 blinking ... and pulled the codes p1705 and p1768 ...

Trouble code P1705 implicates the throttle position sensor (TPS). A transmission fault (which is indicated by a flashing "D4") can arise if the TPS is malfunctioning. Consequently, I would recommend testing the TPS first. Once code P1705 is resolved, then...

Q: Can you help me with this high pitch squeal before I find a cliff?

Remove the serpentine belt (as well as other belts - but ONE at a time so you can isolate the component) and turn the engine on (do NOT run engine long, just enough to do test). By removing the belt,...

Q: Transmission shifted very hard one night and has not done it again

Check the level of the transmission fluid. If the fluid and filter have never been changed that would be wise to do as preventive maintenance. Transmission fluid filters can get plugged and clean fluid will promote efficient and long lived...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...