I'm a noob to this forum and this is my first post, under unfortunate circumstances.... I recently purchased a 95 accord sedan with a f22b1 vtec and 4 speed auto trans. I recently changed the oil and to my dismay the crap that came out of it was just nasty milky i havent been changed in 10000 miles kind of oil. anyways, i was driving down the highway and suddenly the rpm shot up to the redline and the car proceeded to "limp" mode. luckily i was only a few miles from my driveway and was able to squeeze her home. i jumped the service connector to get my codes, i got code 15 on the d4 light. i reset the ecu and proceeded for a td. the car shifts fine as long as i manually shift from d1 and up with an occasional slip or two. my dad recommended bars leaks auto trans repair, my main question is will this help and if there is anything else i should look for, thanks for the time and responds

 

Could be time for a re build. How many miles on the car? Pull the dip stick and check level and color of fluid.


Posted from Honda-tech.com App for Android

 

trans has 90000, motor has 68000. i checked the fluid color, still red but smells a little funny.

 

Did you change the fluid?


Posted from Honda-tech.com App for Android

 

no that is the next step just trying to get some input on the the bars leak trans repair additive. just wondering if anybody else has tried it out and had any luck with it

 

Yeah. Little advice there buddy. That **** never works, if it does it doesn't last long.


Posted from Honda-tech.com App for Android

 

thanks for the input, somebody mentioned to me that the mainshaft speed sensor could be bad any ideas?

 

The crank position sensor (crank angle sensor). 95's don't have them. If that's what is being referred to.


Posted from Honda-tech.com App for Android

 

Code 15 on the D4 light is for the NM sensor, it is probably coated in ferrous material.
Pull it out, clean it, and reinstall with a new O ring.
http://techauto.awardspace.com/transmission.html

Scroll down and read up.

 

update: driving down the road, it slips going into 3rd gear, if i cut the key off going down the road and back on it shifts into gear properly and works for a bit, could this be the tcu at fault?

 

@mad mike, where is the nm sensor located, i read the link you posted which was very informative but it seems like it is 90-93 informative with very limited detail on my 95. next question, if i pull the shift solenoid off the front of the trans, will i loose fluid when i remove it, i ordered a new o ring and hondas dw-1 trans fluid but i dont wanna pull it without the other materials ready in hand. i read on here about the flammed disagreement about the fluids i should be using, and that i shouldn't get my tranny flushed by a machine, i should do it by the drop 3 quarts and drive it a few miles and drop 3 quarts and etc until all the fluids are cleared. the only thing i find that really sucks about this tranny is that there isn't an accesible filter thats changeable.

 

The differences between the motors and transmissions between those years is negligible. From the looks of that website's section on it (search for NC/NM speed sensor, code 9/15) it looks like the sensor is located on the passenger side, here's a better exploded diagram:

http://www.hondaautomotiveparts.com/...GHT+SIDE+COVER



I believe part 16 (28820-PX4-024) is the one you should be looking at for the full replacement sensor. The o-ring itself is 24 (91309-PX4-003)

There is no serviceable filter for the transmission so I wouldn't worry much about that. Drain whatever is in there (potentially non-Honda fluid) and then refill with the OEM ATF.

 

thanks to the muffin man lol, any ideas about the tcu while your catchable?

 

Not sure, if I'm not mistaken though, your TCU is separate from the ECU so if you knew someone with a 94/95 automatic Accord you could attempt swamping them.

Given you're throwing a legitimate code though I don't know if I'd point fingers at the TCU yet.

 

90-97 Accord transmissions are the same family, the difference between the 90-93(CB) and 94-97(CD) ATs is the gear ratios.

Part #16 is the NM sensor, do yourself a favor if the NM is coated in ferrous material the NC sensor is probably as well. Purchase two new O rings (part #24 in the diagram) and make sure both sensors are clean. These sensors tell the TCU what speeds they are traveling at, the TCU then will then actuate the shift solenoids at the appropriate speeds for correct gear selection. Follow the instructions in the TechAuto link and make sure the sensor resistance is within spec.
There will be a dribble, bit the trans should not drain out, they are fairly high up in the case. I do not recall there ever being much fluid. But if you take them off with the engine running, expect to get blasted with high pressure atf.
I do not know what the makeup of the Honda ATF is. Dexron II is embossed on the dipstick, however the owners manual states that it should only be used temporarily. I cannot recall what, if anything, the original under hood label states. I have seen 'universal' ATFs that claim to work with Type F, Mercon V, and +4 fluids. This is complete crap, there is no universal fluids. Some makes or models may share the same ATF type, but it's usually because they share a same or similar transmission. Honda is unique in that the transmissions are of their own design, and not subbed out to Hydramatic, Jatco, Borg-Warner, Tremec or Getrag(to name a few).

Trans fluid should get changed ~30-50K miles depending on driving conditions. Being it is so infrequently changed, is mission critical in keeping the car moving, I find the added cost of the Honda ATF to be inconsequential. It leaves out the doubt of using an incorrect/incompatible fluid with the transmission.

Avoid the flush machines, Hondas H4As do not use as high a pressure as typical planetary gear set ATs. Using such a machine can do damage to internal seals. The drain and drive method is preferred. Reuse the old drain plug gasket until the last drain.

Filtration does not really need to be done on the fluid as it is a fairly closed system. If the fluid is changed regularly, and the drain plug along with the NM/NC sensors are kept clean, there is little to no worry of contamination. The 'filter' is not really a filter anyway, its simply a screen to prevent blockage, similar to the screen on the oil sump pickup.

 

thanks for the advice muffin man and mad mike, the thing that bothers me was the condition of the oil when i changed it, makes me wonder when or if the tranny fluid was ever changed. the car is not in the best of shape and evidently somebody riced the hell out of it. The back glass shows evidence of an APC sticker and the interior light bulbs where changed to green lol (coincedently thats the same as the car). I forsee lots of repairs in the future lol, thanks for all yalls advice, greatly appreciated

 

What color was the fluid when you changed it? You got me thinking now that you said it bothered you when you changed it.


Posted from Honda-tech.com App for Android