I had a Hyundai Accent where it had lost reverse and all other gears were funny. It was an overdrive drum/clutch bearing failure. With yours, I don't think that could be the issue. Maybe a pulse generator?

 

... possibly not related ... a good idea though

Here is a thread about the neutral safety switch maintenance.

http://www.toyotanation.com/forum/1...h-generation-1992-1996-1997-2001/366549-diy-neutral-safety-switch-cleaning.html

I can't guarantee that it will fix your problem ... but you ought to perform this maintenance ... just so you can eliminate as a possible cause of your problem.

Actually, on the front of the NSS, there is a cable from the gear selector of transmission which you need to inspect ... to be sure that it is in the correct position... has not slipped or anything.

Also, your ignition and possibly other electrical items may function better, if you clean the interior copper electrical contacts ... within the NSS. I used plastic safe electrical contact cleaner, some fine emery cloth, some new silicone dielectric grease ... also lube the perimeter gasket, but don't break it. Stretch the two small wiper arm springs slightly before reinstalling ... but don't let them fly off.

 

how is first gear, is slipping?

 

I have suggested that they take the car to a Toyota Specialist. Plus, I read per Haynes Manual that the trans possibly will provide codes on the problem. Most of all I feel a Specialist has seen this and will have a good sequence of troubleshooting.

Hopefully this issue will be solved this week and I’ll share the results. Thanks To All!