1994 Caprice PCM changes for 3.08 to 4.11 gear swap - Chevy Impala SS Forum
 
LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old 05-24-2011, 01:34 PM Thread Starter
Senior Member
 
Join Date: Mar 2006
Location: Montgomery, IL
Posts: 185
 
1994 Caprice PCM changes for 3.08 to 4.11 gear swap

What needs to change in the tune when changing from 3.08 to 4.11 gears for a 1994 9C1 LT1 caprice? I changed the gear ratio for the speedometer to work correctly. The trans is taking a long time to shift from 1st to 2nd. The rpm's are higher than I want. I want to drive a couple of hundred miles with the new rear gears before the T56 swap.

1996 DCM Impala SS
1994 DCM 9C1 Caprice
1981 LQ9 4L80E Trans Am
jeffd is offline  
Sponsored Links
Advertisement
 
post #2 of 4 (permalink) Old 05-27-2011, 12:41 PM
Senior Member
 
Rocko350's Avatar
 
Join Date: Apr 2007
Location: Mount Airy,MD
Posts: 3,912
 
What software are you using?

Chris

94-95 Scan. Free, well written diagnostic software
http://www.mediafire.com/?0elo4c935uc5s
Rocko350 is offline  
post #3 of 4 (permalink) Old 05-31-2011, 01:19 PM Thread Starter
Senior Member
 
Join Date: Mar 2006
Location: Montgomery, IL
Posts: 185
 
Tunercats OBD-I.

1996 DCM Impala SS
1994 DCM 9C1 Caprice
1981 LQ9 4L80E Trans Am
jeffd is offline  
post #4 of 4 (permalink) Old 05-31-2011, 09:54 PM
Senior Member
 
Rocko350's Avatar
 
Join Date: Apr 2007
Location: Mount Airy,MD
Posts: 3,912
 
there is a tool built in to the software that makes corrections to all the tables at once. its in the drop down menu at the top of the software screen. fill out the data and select apply, then ok when the little screen says"hey buddy your gonna change a sh*tload of tables" then save and upload. Its possible the rpm and mph wot(kickdown) settings might let you hit the rpm limiter before you upshift at WOT, so change at your own risk.

Chris

94-95 Scan. Free, well written diagnostic software
http://www.mediafire.com/?0elo4c935uc5s
Rocko350 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



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

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

Password:


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

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

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