Hey group, We have an import shop in Oklahoma and have run into a problem. My shop car is a 01 civic ex automatic. It had the bmxa trans which started to slip and jerk so we ordered a replacement. The place sent us a slxa and assured us it would work. INstalled and the shifter is between d and 3 with a check engine light for wrong gear so I swap the shift position sensor on the end of the trans with my old one and the code went away but still between 3 and d. I can live with that but it also is running at 3000 rpms at 60 miles per hour and has no lock up. After driving awhile it also has a new code which is 740 for the lock up. I don't know if this won't work and needs another trans or what. Shifts great and smooth without jerking or slipping but seems way to high on the rpms.At 70 your like 3500.Any ideas or help would be appreciated.

 

P0740 - means your torque converter is going and need to be replace or the o-ring is damage. I would recommend that you get some to rebuild your own transmission.

 

P0740 on a BMXA transmission is your linear solenoid code, and on some models an overheated torque converte, Diagnostic trouble code P0740 is detected when TCM detects an improper voltage drop when it tries to operate the solenoid valve.

The solenoid is easy to get to located on the transmission side under the battery box and has 2 solenoids attached to one unit with 6 bolts one solenoid connection is black, the other brown, remove and test the solenoids, if they are working its going to be a torque converter.

 

Hey, fellow Civic owners!

My car is a 2001 Civic LX that I bought last year with 54,000 original, one-owner miles on it (now has 96,000 in 16 months and I'm still the 2nd owner. It was parked for over 8 years when I bought it!).

It just started having transmission issues the other day. First, I started get a whine under the hood when I first started it cold in the morning, but once it warmed up it would go away. Everything seemed to be fine, so didn't worry much. It shifted fine, transmission worked as it should. It's a BMXA 4-speed A/T. Anyway, all of a sudden, out of the blue, yesterday is seem to slip a bit between 3rd and 4th, but no other gears. Well, by the time I drove about 10 miles to my friend's house, it was doing that from 3rd to 4th, then as I was driving it to another friend's shop, it started slipping between 1st and 2nd, so bad that when I pulled away from a light I'd have to pull onto the shoulder to let cars whiz by until it shifted to 2nd.

So, after searching on Google (which most often led me to this forum for answers! ), I used my friend's expensive OBD-2 and checked for codes, even though my check engine light never came on. The OBD-2 showed "No DTC's to display". Okay, that's probably a good thing. The transmission fluid is clear and has no smell at all (burned, or anything else).

But 90% of the websites I found on google searches, including watching a bunch of YouTube videos, seemed to pinpoint my problem to the transmission solenoids. I watched videos and stuff and it's easy to test the solenoid. I have an Ohm Meter. My question NOW is this: since the solenoid is on the FRONT of the tranny at the bottom, will transmission fluid pour our when I remove it to test it? If the answer is yes, is there any reason I can't just unplug it to test it (them)? I can check the resistance, plus apply voltage to the male tabs inside the boot, so it seems I can make it click even if it's on the car. Am I right?

This is my first Civic newer than the 70's models. I do have automotive repair knowledge, so I won't screw anything up. But I've never had to actually work on this model year other than replacing all the brakes. I just want to see if I can remove that double-solenoid from the tranny without losing fluid, and/or can I just leave it on the tranny and still test it?

No reason having a nice car if the tranny goes out!