Toyota Corolla AE100 having auto transmission problems, OverDrive does not work completely. Car runs but will not engage O/D even after running for hours. Changed Gearbox & Solenoids but still not working.

Repair your vehicle right away. Just click on the link I attach
http://www.reliable-store.com/products/1994-toyota-corolla-sprinter-ae100-owners-manual
http://www.reliable-store.com/products/1994-toyota-corolla-sprinter-ae100-owners-manual

I think yoy have an internal transmission issue that will require and overhaul to correct.

Two problems you say !!!

I won't guess at all the possibles

Just have a shop diagnose the car

If you do all your own work-- then be specific
about what has been done & how

If it is flashing then it is a malfunction indicator. Think of it as a "check transmission light." It could be anything from a loose connection in the shifter to a bad transmission. How does it drive? Is it shifting into overdrive?

Have the transmission repaired or replaced. The shift arm that shifts the gears is probably broken. That is why you cannot switch gears and is making that noise.

The Code 12 on your Corolla it refers to a problem with the Rpm signal from the distributor, I recommend you to replace the distributor, make sure that is complete with the coil and igniter installed, you can save quite a bit of money by getting one from a salvage yard or an aftermarket unit from a local auto supply store !

not usually close to the ac it is likely eithor the od button is dosconected burnt or blew a fuse

rarely is the selinoid a fault


but if you know where the selinoid is run a direct line to it using speaker wire engage it and see if it works
if it does try and track the circut failing that run a line arround it and make it manule

I believe the ECU that runs the transmission is the culprit . They are notorious for killing the tranny on these vehicles.

I would get the auto transmission "power flushed"; that will remove all of the dirty oil and any contaminents. That is the first thing to do, and usually works pretty good. Let us know how it turns out., Thanks.

Hi. 2005 Corolla CE. It's normal. They tend to do this when upshifting form 1st to 2nd gear. No timing chain readjustment needed.

96 Corolla. Overdrive not working properly, if not engaging after 45mph constantly. If driving on the city, is normal, but not after 45mph, when the car is trying to engage overdrive in order to save gas and preserve the trans gears. If not able to get help at the dealership, find another one and explain them the situation.