I have driven the car for about 200 miles. Sometimes it will shift and perform flawlessly other times it will shift too fast or too slow sometimes slips completely. When this happens i stop and the transmission will go right back into gear and drive fine for a varying period of time.
SUBARU Automatic Transmission Solenoid A Dropping Resistor
July 2, 2011. Author: Lewis Werner The SUBARU automatic transmission dropping resistor is connected in parallel with duty solenoid A. Duty solenoid A regulates the Subaru automatic transmission fluid line pressure. Like most of the transmission solenoids, duty solenoid A's duty cycle is varied by the transmission control unit (TCU) to control the line pressure.
The dropping resistor works with duty solenoid A in regulating the automatic transmission fluid line pressure. This resistor keeps a certain amount of current flow through duty solenoid A during the 'OFF' portion of its duty cycle. So in other words, duty solenoid A is never fully 'OFF'.
The dropping resistor is located on the right front shock tower, near the MPI (multi-port injection) fuel system dropping resistor. The photos at the right depict the Subaru automatic transmission dropping resistor.
If this resistor fails open, becomes disconnected, or has its wiring severed, one result might be increased shift shock. The reasoning behind this is that without the resistor in the circuit, the line pressure may be higher, since without the current passing through solenoid A during the 'OFF' portion of its duty cycle, it will tend to close further, and thus not bleed off as much pressure from the automatic transmission fluid pump.
If the resistor fails open or is disconnected, it should cause the ATF temperature lamp to flash 16 times on the next startup, since the TCU would be able to see electrically that the resistor is open.
This resistor was used on the SUBARU 4EAT phase I and 4EAT phase II automatic transmissions. It may also be used on the 5EAT though I have not confirmed it.
http://www.scoobyenthusiast.com/subaru-components/subaru-automatic-transmission-solenoid-dropping-resistor
4eat 1 2 shift shock 1990 to Present Legacy Impreza...
4eat 1 2 shift shock posted in 1990...
SOURCE: subaru impreza automatic transmission won t shift
Try replacing the transmission filter and the trannie fluid. Mine would only go in reverse, and now it drives pretty well. This year has a screw on filter. Hope this helps
SOURCE: 2000 Subaru Outback transmission problem
After a good deal of research and several shops suggesting a rebuild of the transmission, I decided to have the trans fluid and filters changed before doing anything. It was a tough call because it could have been a waste of $125. As soon as the spin off filter was removed you could see it was blocked. So the hydraulic pressure in the system was way down, still enough to engage reverse and enough to work all the shifts, but not enough to engage forward without a slight tap on the accelerator.
My Subaru has 240 000 km on it and I suppose the clutch pack rebuild wouldn't hurt, but as it is now it engages quickly and shifts up are noticeably smoother.
May not be the solution for every case, but it solved my situation.
SOURCE: Subaru won't start
You've got to assume that the trans oil change is unrelated. With the key in the run position see if the wipers work, if not the battery is dead. Otherwise, try rocking the car back and forth while in park and then hope for a miracle. If all fails, get out the volt meter and start measuring voltages at the starter and the power pack (coil).
SOURCE: 99 Subaru Legacy auto Transmission will not Engage right away P-D
change fluid and filter
Testimonial: "Right on the money!"
193 views
Usually answered in minutes!
×