Code p 700 refers to transmission control system/mil---malfunction===causes ---wiring --- TCM ( transmission control module)
code p 0730 refers to incorrect gear ratio====causes --TR sensor / switch--shift solenoids---transmission mechanical fault
code p 1740 refers to torque converter clutch solenoid
it is probably correct that dealers will not remove and repair transmissions but I suspect that they are not as reputable as they could be because the codes indicated are repairable in car
I am thinking that there is no mechanical problem requiring a $4,500 transmission so I suggest that you take it to an accredited professional transmission shop and get a proper diagnosis and a quote to replace the faulty tcm and TR sensors
SOURCE: p0740 code on 2000 Honda Odyssey
Code p0740 is a problem in lock up control solenoid assembly, Check whether scan tool indicates another code. Does the scan tool indicate another code? YES - Perform the Troubleshooting Flowchart for the indicated Code(s). Do not continue with this troubleshooting until the causes of any other DTCs have been corrected. Measure the line pressure. Is the line pressure within the service limit? Repair the hydraulic system as necessary. Replace the Lock-up Control Solenoid Assembly set lock-up control solenoid valve/shift control solenoid valve A assembly and the A/T clutch pressure control solenoid valve A/B assembly. Turn the ignition switch OFF, and reset the PCM memory by removing the BACK UP fuse in the passenger's under-dash fuse/relay box for more than 10 seconds . Using the scan tool, check to be sure that the engine coolant temperature is 176°F (80°C) or above . Drive the vehicle at 55 mph (88 km/h) for more than one minute . Recheck for code P0740. Does the OBD II scan tool indicate code P0740? YES - Remove the torque converter and inspect for a missing torque converter O-ring. If the O-ring is damaged or missing, replace the transmission and torque converter. NO - The system is OK at this time.
SOURCE: Same problem experienced... check engine & TCS lights ON!
your pump inside the transmission might be bad or governor isnt wronging right..but its all about the tranny here...
SOURCE: 1998 dodge grand caravan transmission slipping
A good place to start would be a fluid and filter change, and be sure you use proper (recommended) fluid. Then I would remove connectors to solenoids, modules etc, on transmission and clean them well with contact/electrical cleaner. Disconnect battery prior just for sake of safety & to make sure no circuits get shorted while doing it.Then give it a try, and see if any improvement. If still acting up, I'd spend a few bucks on at least having diagnosed by a knowledgeable technician at a dealership, or a transmission repair chain. Sometimes it can be a solenoid or speed sensor, or something not too expensive. Once you have proper diagnosis, then make your decision.
SOURCE: 2003 Buick Rendezvous Transmission Problem.
I would try changing the filter, I've seen some that should be changed every 20,000 miles. You might want to check for any DTC codes stored for the transmission. Auto Zone will do it for free. If there is a code that might point you in the right direction.
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