I am not sure if this is a transmission problem,

- Low transmission fluid level
- Dirty transmission fluid
- Faulty shift solenoid 'E' valve
- Shift solenoid 'E' valve harness is open or shorted
- Shift solenoid 'E' valve circuit poor electrical connection

The P0770 code is detected when Lock up does not occur when driving in the lock up range (normal driving at 80 km/h [50 mph]), or lock up remains ON in the lock up OFF range.

I’m happy to assist further over the phone at https://www.6ya.com/expert/brock_d67526d2a834c47e

Get a readout from the car's computer to see if there is a trouble code stored, which will give a good clue to the problem.

Camrys of this age often have a shift solenoid fail in the transmission, which will cause the symptoms you describe,

Sounds like a linkage issue, if not the tranny itself.

P0773 TOYOTA - Shift Solenoid E Electrical Malfunctionhttp://engine-codes.com/p0773_toyota.htmlForum CodePossible causes- Faulty shift solenoid E valve
- Shift solenoid E valve harness or connectors
- Shift solenoid E valve circuit is open or shorted
- Low transmission fluid level
- Dirty transmission fluid

If it's a 4 cylinder engine it takes 2 and 3/4 quarts, if it's a V-6 it takes 3 and 1/2 quarts.

It has a belt.

its part of the neutral safety switch on the transmission it goes over the trans input shift shaft on the front of trans facing the radiator. new one must be adjusted by the neutral if you change, theres a line and a N on new switch put trans in N and align lines then tighten 2 bolts to lock down. good luck

Linkage could be sticky I would try to clean off any grease and dirt then spray some lubricant on the linkage this might help and it won't hurt it any .

it sounds like you ground the spacers between the gears. have a look under the gear shift. pull the gear shift off then look at the transmission spacers. you will see where the gear shift sits see if some spacers look like the rest.

Not likely to be the clutch pack as you dont mention slipping wich is the normal sign of overheated or worn clutch bands.Not sure with your vehicle but 2 methods that control the shift severity are engine vacuum or pump pressure inside the auto. so check balls are a possibility. They are spring loaded to open at a set pressure,or close.Could you check to see if its a vacuum controled and if so its a lot easier to fix as the vacuum control should be outside the trans.