C4 no third gear - Ford Muscle Forums : Ford Muscle Cars Tech Forum
 1Likes
  • 1 Post By Sassymustang66
 
LinkBack Thread Tools
post #1 of 4 (permalink) Old 04-30-2019, 04:21 AM Thread Starter
Registered User
 
Join Date: Oct 2018
Posts: 7
C4 no third gear

I have a 1966 mustang with a 351c and a c4 transmission from 1970 I have rebuilt transmission and put a transgoshift kit in it I’m getting 15 inches of mercury at idle and vacuum modulator has been replaced and I still can’t get third gear any help would be appreciated
Sassymustang66 is offline  
Sponsored Links
Advertisement
 
post #2 of 4 (permalink) Old 05-01-2019, 02:28 AM
Subscriber
 
Join Date: Jan 2001
Location: Australia
Posts: 4,289
Re: C4 no third gear

Was the modulator adjusted ? How long is the pin? How much preload on the pin? Is the spool valve under the modulator pin facing the right way? Is the kickdown free and not jammed on?

The vacuum is definitely full manifold vacuum and not a ported vacuum source?
gregaust is offline  
post #3 of 4 (permalink) Old 05-01-2019, 04:29 PM Thread Starter
Registered User
 
Join Date: Oct 2018
Posts: 7
Yes I have adjusted the modulator in both directions and it didn’t make much difference. The pin is 1.55 long. Kickdown lever is free and works proper .i have done an air test on tranny and all clutch packs work , both bands operate proper . The only thing didn’t test right was governor and I am going to pull apart tonight and see what I find . The valve body I tore apart and can’t find any thing wrong. I have new modulator coming going to try that to.
Sassymustang66 is offline  
 
post #4 of 4 (permalink) Old 05-03-2019, 04:55 AM Thread Starter
Registered User
 
Join Date: Oct 2018
Posts: 7
Thanks for the reply but I think I have found my problem the govener valves were stuck and wouldn’t move freely will know tomarrow if it works
gregaust likes this.
Sassymustang66 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Muscle Forums : Ford Muscle Cars Tech 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











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



Similar Threads
Thread Thread Starter Forum Replies Last Post
c4 no third gear, just swapped converters. help FOXBROSRACING C4 Transmissions 7 08-04-2013 06:29 AM
no third gear 86_LX C4 Transmissions 15 04-02-2008 02:18 AM
no third gear slipping in reverse 65ponyexpress C4 Transmissions 2 09-22-2007 10:13 PM
No third gear or doesnt want to shift to it. sniper626 C4 Transmissions 2 08-30-2007 12:10 AM
Help !!! No third gear and now puking fluid on drivers side?? 65whiteFastback C4 Transmissions 3 08-19-2006 02:16 AM

Posting Rules  
You may post new threads
You may 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