Can't... overdrive is controlled by the computer. If you removed the computer I'm assuming you're building a hot rod. If this is the case, I suggest removing the overdrive tranny anyway and installing a turbo 350 (TH350). You can get them cheap, they're a workhorse and it'll bolt right up to any GM V8 and many older V6's. Shift performance kits are cheap for them... around a hundred bucks or less (chirps into every gear). They're also easy to find... all late 60's and 70's GM muscle cars had them (if they were automatics) and it was used on full size cars without overdrive right through the 80's.
Get the transmission rebuilt.
Overdrive in Subarus, like just about every car with an automatic transmission built in recent memory, is built into the routine working of the transmission. Your transmission selector, if it's like mine, has a "D" for drive then the next digit down is a "3". Choosing the "D" allows the vehicle to access overdrive when appropriate. Driving with "3" as your chioce does not allow the overdrive to work. --Ken
I was told that it is the temp sensor. The car needs to be at 150 degrees. I am working on the same problem.
overdrive is not working and it should be looked at by a transmission shop
What about the overdrive needs reset? If it isn't working, then you need to have the computer checked for codes, you need to check trans fluid. etc...
lower fuel economy.the reason its not working is what u should be worrying about.could be a presighn of transmission failure.
if the speedo is also not working it could be a vss problem or an issue with the gear or square shaft where speedometer hooks to tranny/ if speedo works just no overdrive there is a temp sensor on the tranny that can keep od from working or may be wiring issue with factory od on/off switch
This is an internal transmission problem and could have several causes. Transmission needs to be replaced or rebuilt. There are a good amount of used ones on the market for reasonable prices. Get one with a parts and labor warranty.
Check Ignition switch. Does your speedo or tach work? If not it's the ignition switch. The transmission needs 12volts to operate and if the ignition switch is not working right you will not have first gear or overdrive, the suburban will try to take off in second and seems like your tranny is slipping!
There are several red flags that can indicate overdrive is not working on an automatic vehicle. If a car is shifting in and out of gear or out of overdrive is usually the first signal of a problem. Other signals include low fluid levels and and erratic temperature sensor.
It's electronically controlled by the PCM, so if it quit working, then most likely it is going to have to do with something wrong inside the transmission. About all you can do is check the fluid level. After that, it will probably need help from a good "trustworthy" transmission shop.
A properly working cat, no. Removing it, no. A failed cat, yes.A properly working cat, no. Removing it, no. A failed cat, yes.