yes that's how your supposed to drive it will go into o/d above 50 mph
No. Three speeds are normally without overdrive. There may be another transmission that you could replace it with to get overdrive.
3 PLUS OVERDRIVE
Sure... you'll just have to remove the transmission & flywheel.
Yes a lt1 will fit in a 1991, but i believe the motor mounts are a little different for the lt1. You cannot transplant it though without an PCM from an lt1, which needs a 4l60E transmission to control the transmission and engine codes. There are standalone kits available but they cost more than a PCM.
Not at all.
if it is blinking steadily without your input , button on the end of the gear shifter, then you have an internal transmission problem, or a pcm problem. Neither of which are cheap to fix.
A flashing OD light means there is a problem with your transmission. Your truck should continue to operate, but without overdrive capability, have it checked out at a shop. Your Mazda Pickup is almost identical to the Ford Ranger and thus should have a Ford transmission, when there is a problem with the transmission the OD light with either come on or Flash and sometimes the Check Engine light with come on too depending on what is wrong with the tranny.
It is not recommended to pull a trailer with automatic trans in overdrive, put in drive only. When attempting to pull without locking out overdrive, trans will continue to shift from drive to 0verdrive causing a massive heat buildup. Heat is not good for automatic transmissions, and will eventually cause failure, causing your wallet a very bad day!
The D with a circle will allow the transmission to shift into overdrive which reduces engine RPM"S and will conserve fuel when on a highway cruise. The D without a circle will not let overdrive engage. this is useful when traveling on hilly terrain where overdrive tends to engage and disengage. I usually drive in the circle mode unless i am climbing uphill and the transmission keeps downshifting and upshifting. Rule of thumb: Circle D on the highway, and plain D in the city
The best fictional way to travel through space fast without messing with time is teleportation.
Overdrive just lets the car use the lowest gear. Without overdrive you are probably only using 3 gears, and with it you are probably using 4.
Not without swapping out the bumper, as they differed slightly in those years