92 Mazda Protege auto-trans, hold-light flashes after driving 20-30 mins.
When trans becomes warm/hot, car drops out of drive/overdrive (D) and seemingly goes to '2' and 'hold' starts flashing on the dash board, yet the shifter remains at 'D'. Trans fluid level is good. Is there a 'trans fluid temperature sensor' that is defective, or could it be some other problem?
I would much appreciate your assistance with this matter.
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If you mean engine wont stay running in drive might be looking at torque converter, if you mean wont go into over drive even with your over drive switch on your over drive clutches and or shift solenoids are bad trans needs rebuilt or replaced
O/D light flashing is computer indicating an issue with the transmission -no surprise. Make sure the transmission fluid is still good (dosn't smell burnt, right level). Slipping could be the TCC (torque Converter clutch) - not a cheap part - but would only really slip in 4th gear (above 40 mph). Slipping before that could be numerous things in the trans (low fluid pressure, torque converter issues).
I would be tempted to replace the fluid anyhow, but there is a chance an expensive issue is starting to arise - and replacing the fluid on a failing transmission could cause it to fail 100% (or can fix it nearly 100%). These can be touchy transmissions, too much DIY without the right diagnostic tools can be bad. Not what you wanted to hear, and not an expert, but have had some expertise with these.hope that helps.