First the gear could be out. The other issue could be with the linkage itself in the transmission thus it won't go into overdrive.
behind the engine in the transmission tunnel...
C-6 transmission has not been used for several years, since early 80's. What you have is an overdrive transmission 4R70W that is electronically controlled.
I believe that was an ( A4LD ) automatic transmission with the 4 cylinder engine on a 1989 Ford Mustang
The 1996 Ford Explorer overdrive sensor can be found on the right hand side of the transmission. The overdrive sensor will be near the front of the transmission.
what would transmission not to shift in to overdrive
This answer is for a 1990 ford thunderbird 3.8 NA it is locate on the left hand side of thet transmission This answer is for a 1990 ford thunderbird 3.8 NA it is locate on the left hand side of thet transmission This answer is for a 1990 ford thunderbird 3.8 NA it is locate on the left hand side of thet transmission
Mercron transmission fluid is used in a 1978 Ford Thunderbird. Type F fluid can also be used but should not be mixed.
The transmission reservoir on the 1992 Ford Thunderbird is located in the engine compartment at the top of the motor. You can find it just behind the oil reservoir.Ê
There is a CEL, Check Engine Light, on the 1989 Thunderbird.
aode
AOD
The overdrive is designed for speeds after 50 mph so your overdrive should not be engaged until you are driving on the highway. The overdrive gear is designed for fuel efficiency and does nothing in town.