General Tech Help Good at troubleshooting? Have a non specific issue? Discuss general tech topics here.

ECU for automatic trans

  #1  
Old 10-31-2018, 03:32 PM
esc2064's Avatar
Thread Starter
Join Date: Oct 2018
Posts: 4
Default ECU for automatic trans

Hi there. This is my first post on this forum and have a question if anyone can help that has been down this path before. I want to do a transmission swap from manual to an automatic is the ECU the same? I have a 1994 Honda Accord EX Sedan. Thanks.
 
  #2  
Old 11-04-2018, 07:35 PM
Super Moderator
Join Date: Sep 2006
Location: Houston, TX
Posts: 13,034
Default

Nope. You will need an ECU from a 94/95 EX Automatic Transmission.
 
  #3  
Old 11-04-2018, 08:08 PM
esc2064's Avatar
Thread Starter
Join Date: Oct 2018
Posts: 4
Default

How about the wiring harness? Is this required to be swapped out too? Thanks.
 
  #4  
Old 11-05-2018, 11:50 AM
Super Moderator
Join Date: Sep 2006
Location: Houston, TX
Posts: 13,034
Default

Forgot to mention that you will need a TCU from a 94/95 EX Automatic.

You'll need the wiring harness for the transmission.

I'm not sure if the wiring harness will be necessary for the ECU.

Why are you doing this swap?
 
  #5  
Old 11-05-2018, 12:53 PM
JimBlake's Avatar
Super Moderator
Join Date: May 2006
Location: Wisconsin
Posts: 17,371
Default

The instrument cluster is different, having the lamps for PRND21. For 1994 I'm not certain whether the ECM or PCM will recognize whether it has the correct cluster.

But... Does anyone know whether the VSS is compatible auto vs. manual?? Number of pulses per mile might drive the speedometer at a different rate.
 
  #6  
Old 11-05-2018, 09:27 PM
esc2064's Avatar
Thread Starter
Join Date: Oct 2018
Posts: 4
Default

I bought this car for my wife and she doesn’t drive a manual transmission and she doesn’t want to learn. I think she’s afraid of the rolling backwards feeling when going uphill where we live. Right now, I’m just doing my homework before I begin my task of swapping out the drivetrain. The JY is full of these cars so getting parts is not a problem but here’s my list that I figure I’ll need to swap transmission let me know if I have missed something. Thanks

1. Automatic transmission.
2. Shift column with linkage.
3. Automatic transmission computer module.
4. Gauge cluster.
5. Automatic transmission wiring.
6. Drive shafts (left & right).
 
  #7  
Old 11-06-2018, 06:28 AM
JimBlake's Avatar
Super Moderator
Join Date: May 2006
Location: Wisconsin
Posts: 17,371
Default

Since you're junkyard-diving, I'll make a couple suggestions which I think will be equally easy to find. (I'm not completely sure about all of these because I haven't done this job in either direction)

2a. Auto-Transmission Shift lever
2b. Shifter Cable
2c. Some trim parts of the console might be different??

3a. Auto-Transmission computer (TCM)
3b. Engine computer (auto-trans version of the ECM - also has to match VTEC vs. non-VTEC)
3c. Brackets for mounting both of these?? (5-speed car doesn't have a TCM)

Cable from throttle-body down to transmission. (Does the TB need a different cable-drum??)

I think the starter is different?

Different bolts for flywheel to crankshaft (A/T drive plate is thinner than a M/T flywheel)

Rear engine mount is different; vacuum-controlled mount low in the middle between trans & firewall. Not sure if any of the other mounts are different?

Brake pedal assembly with switch (different from the brake-pedal switch on a M/T car)
 

Last edited by JimBlake; 11-06-2018 at 06:33 AM.
  #8  
Old 11-06-2018, 01:46 PM
Been Around A Long Time Member
Join Date: Feb 2016
Location: Kimball MI
Posts: 909
Default

Add a transmission oil cooler to the list.
I only say that because the radiator might not have one built into it.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
M-train
General Tech Help
8
12-03-2015 10:47 AM
live2rice
PRIVATE For Sale / Trade Classifieds
7
09-20-2012 02:26 PM
papaschilling
General Tech Help
10
10-12-2007 01:28 PM
Ronnie101
Engine & Internal
5
06-21-2007 09:44 PM


Thread Tools
Search this Thread
Quick Reply: ECU for automatic trans


Advertising

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.