I have had this car for over a year and never had any transmission problems other than the d4 light constantly blinking so I figured that it's probably a faulty wire, and since the transmission shifted smooth I didn't bother fixing it. It slips the most while in drive but if I manually shift it from first gear to second it slips way less but still slips. Sometimes when I turn the car off and back on it won't slip at all.But it's now getting to the point to where turning the car off and on isn't fixing the problem. I checked the transmission fluid level and its good other than being clear,I thought transmission fluid is supposed to be red maybe I just need to replace the fluid. what do you guys think this could be?

 

Yes, drain and fill 3x with honda(Only) atf.

 

I will do this this but why would the transmission slip on and off just because of atf it just seems to me it has to be an electrical problem

 

Probably whatever is causing the D4 light to blink. Just because it does not act up immediatly does not mean you are not allowing continued damage /excessive wear to occur.

Jumper the two wire blue connector from under the glove box, jumper it, and turn the ignition to II(ON). Watch what code(s) the D4 light blinks.

If you are lucky it is something simple and the trans will work fine again.

Yup, should be red, drain and refill.

 

I jumped the blue service connector and my d4 light blinked 8 times fast first time than it blinked 9 times fast the second time,I can't seem to find those codes online,all I find are engine codes there nothing for the transmission.

 

1-Lock-up solenoid 'A' circuit open or shorted.
2-Lock-up solenoid 'B' circuit open or shorted.
3-Throttle Position Sensor circuit open or shorted.
4-Vehicle Speed Sensor open or shorted - No signal from speedometer.
5-Shift Lever Position Switch circuit shorted.
6-Shift Lever Position Switch circuit open.
7-Shift Solenoid 'A' circuit open or shorted.
8-Shift Solenoid 'B' circuit open or shorted.
9-Counter shaft or transmission speed pulse generator open or shorted.
10-Coolant Temperature Sensor open or shorted.
11-Engine RPM (Ignition coil signal) open or shorted.
12-(No code 12 used)
13-Main shaft speed pulse generator open or shorted.
14-Linear (line pressure control) solenoid open or shorted.
15-Kick down switch circuit shorted.

 

where do you guys get your cheap honda atf online? need to change mine asap pretty dark red

 

cool thanks for the codes,I will test those sensors now.

 

I can't find anything on the transmission speed pulse generator,is there another name for it?

 

and I can't find anything on the counter shaft this is really confusing can someone please help me clarify this I can't do anything until I know exactly what those two things are

 

Change the fluid out, no need to use Honda ATF. Purchase three 1 gallon jugs of Dexron II or Dexron III. You will need to flush the clear mystery fluid out. If your local stores carry Sea Foam, look for Sea Foam Trans Tune. Trans Tune will break down and clean the varnish and gunk from the transmission internals.
Wipe off the magnetic drain plug.

ONLY DRAIN the transmisison. DO NOT PRESSURE FLUSH the system, and do not use the cooler lines to pump the fluid out.
You want to drain the slurry from out of the sump. Only way to do this is to remove the drain plug.

Drain and refill 3X at minimum. Preferably add a pint of Trans Tune at each refill to aid in cleaning and removal of the varnish and slurry. When changing the fluid you will want to drive the car around between each change and place the car through all its gears to flush the hydraulic circuits.

8- check the wiring to the shift solenoid. This is the pair of shift solenoids that point at the radiator. With the car off, disconnect the grey wire connector to the solenoid pair and check for corrosion. With a wire, jumper power directly from the positive battery terminal to the solenoids, you should hear the solenoids click. If no clicking sounds verify the terminals on the connector are clean and corrosion free.

9- is for the NC or counter shaft sensor. It is located on the right hand side cover and points towards the front of the car. Check the resistance of the sensor wire, it should be- 400-600Ω @ 20° C. If this checks fine, pull both the NM and NC sensors and verify they are clean of slurry. If the sensors are gooped up with ferrous material(they are magnetic pickups) they will not have a strong signal to indicate what RPM the main and counter shaft sensors are. Wipe them clean and reinsert.