Just push the button on gear shift and let off gas thanback on -if everything is working you are in overdrive!
According to my Alldata system maintenance charts, the 85 Corvette OD manual trans uses Dexron IIE automatic trans fluid. HTH
Overdrive is the normally allowed position , but unless the speed is higher it won't shift into overdrive anyway
Yes shift od with auto trans in nutral.
Yes, You can put a manual shift valve body in it.
If it was a manual trans it was a five speed. If it was an auot then it was a three speed with an electronic overdrive. So with the electronic overdrive it was a four speed trans but the overdrive failed frequently and was disabled by many owners.
Overdrive should be ran by electrical ,so check your fuses . If that's not it check wiring that runs to transmission.You will have to get under the vehicle . There is an electrical switch that shifts the trans into overdrive , that is your next step . If you have a owners manual in the glove box it should tell you which fuse runs the overdrive circuit .Hope this helps . Rick
If it is a manual trans, the shift linkage might be loose, bent, or damaged.
dirty trans fluid might be the cause. have it changed, but not flushd
A His and Her shifter is where you can go from an auto shift to a manual shift with out having to change trans. and things like that.
You cant really. I have a 1996 Mercury Villager LS 3.0L. The only thing that you notice is a bit less shakyness when shifting (automatic trans). Also the take off will be more smooth and you will feel like you are gettin more power at high speeds or a WOT (wide open throttle). If you mean physically in overdrive at the shifter, you can't. The quadrant is marked with only "D", "2" and, "1". You must assume that it will shift into overdrive when all conditions are met and the computer allows the trans to shift. If you mean how do you know when the trans has shifted into overdrive, there are two ways. First, count the shifts. For overdrive, there will be three shifts. Or, if yours is equiped with a tachometer, watch it for the shift points.
Manual 3 speed trans, 88 mph.Manual 4 speed (overdrive) trans, 88 mph. Automatic trans, 86 mph.
Manual 3 speed trans, 85 mph.Manual 4 speed (overdrive) trans, 88 mph. Automatic trans, 86 mph.