alright, my D4 light was blinking a while back, and I noticed it seemed to be revving higher while cruising. it went away on its own for a while, but now its blinking again, and I once again dont have 4th gear. so I am going to try to replace the TCM and see if it fixes it. I have checked the codes but couldnt find where to look up the trans codes, ECU codes are posted EVERYWHERE, but not TCM codes?

also, I did have the loss of speedo once, but only for a few seconds one day, off/on for about a minute another day and thats all Ive noticed. could it still be the TCM?

on ebay theres alot that say 90-93 in the title but in the auction they say 90-91.

I know with civics 92 went to OBD1, but I read somewhere accords went to OBD1 in 90. so will anyone work or do I have to get a specific TCM model for my car?

93 LX.

i did search some but I have to drive from AZ to san diego in a couple weeks and really want to have a 4th gear when I do, so I need to get it solved ASAP.

thanks

 

any tcms that are also for 1992 lx or dx wll work with your 93 but my under standing none of the ex's will not work

 

i have a 92, tried a tcu from a 90 model , did not work, it is my recomendation you get one from a 92 or 93 lx or dx only and it should have a pxo number 721 or 722. 722 as i understand it is the best one because they had many problems with the 721. i put 4 different ones in my car because the junk yard told me they would work from 90 to 93, this didnt work for me. i made em find and pull one from a 92 and it had the 722 number and worked. done this with two cars, se and ex will not work.
Frank Allen

 

they all should work. heck, I tried one from a prelude h22 and it worked.