What is involved in swapping a C-4 into an AOD 85 Tbird 5.0? - TCCoA Forums
LinkBack Thread Tools
post #1 of 3 (permalink) Old 01-29-2004, 07:08 PM Thread Starter
2nd Gear Poster
Join Date: Aug 2002
Age: 45
Posts: 78
What is involved in swapping a C-4 into an AOD 85 Tbird 5.0?

I am not a huge fan of the AOD transmission and want to know what it would take to swap in a C-4 automatic in place of the failing AOD in my 85 tbird 5.0? I ask this because the 5.0 is not the factory engine, and has been built up slightly. It is a roller cam HO engine from an 89 5.0 Stang. I think I need to get a special flywheel, torque converter, and possibly a custom crossmember and driveshaft.

Does anyone know of a good source for these parts? Any advice?


phils88tc is offline  
Sponsored Links
post #2 of 3 (permalink) Old 01-30-2004, 09:38 AM
3rd Gear Poster
Old_coot's Avatar
Join Date: Sep 2003
Location: Kentucky
Age: 72
Posts: 180
Send a message via Yahoo to Old_coot
Properly set up the AOD is a fine tranny, for an everyday driver its hard to beat, even some chevy guys are buying adapters to put them in GM products. Before you make such a decision drive around a few days not using overdrive to see how you are going to like your car without it.........Dan
Old_coot is offline  
post #3 of 3 (permalink) Old 01-30-2004, 11:30 PM
Johnny Five is Alive
TCCoAAC Member
WkStill's Avatar
Join Date: Nov 2002
Location: NPR, FL
Age: 43
Posts: 1,614
Send a message via AIM to WkStill Send a message via Yahoo to WkStill
Flywheel Same.
Starter Same.
Trans Mount Same.
Gearing Different. (you will loose OD, it will be liked driving around in D all day)
Driveshaft? Find get one from an 84' 3.8 L, (this had a C5, same length as C4)
Crossmember, Not sure, i would grab from 84 3.8L w/C4 as well..

My Car orginaly had a 3.8L/C5 swapped for 5.0L/C5, Blew C5, Did Direct Swap to C4, now running 4r70w.

NOTE!!!! you must have the correct late model bell housing.. I believe you need one that was common on the 250 I6 ? I have pictures of Correct Bell Housing if you need them.... I took a C4 to my Trans Guy for build up, and he said it had the wrong 302 bellhousing, he got me the correct one i needed..

If the C4 is was prev used on a Roller Motor 302 with external balance, then it has the correct Bellhousing.

1984 Merc Cougar
5.0L, GT40X HEADS, E303 CAM,X303 Valvetrain
1998 4R70W Controlled by Baumannator TCS., 3.73 Track Lock Rear., Bauman Lev 3 Shift Kit.
190LPH, 67mm EGR, 65mm TB, 73mm C&L MAF, 24lb/h Inj, TwEECer RT, A3M EEC-IV
TCCoA-AHole Crew 2004
Disclaimer: The opinions expressed in my posts are my own. They are not meant to start a flame war or discourage people. Just my honest opinion and nothing more
Just great, 4 mores years of GOP crap, Im republican, and I endorse this message
WkStill is offline  

Quick Reply

Register Now

In order to be able to post messages on the TCCoA Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome