Replacing the original automatic transmission with a manual one - Pontiac GTO Forum
User Tag List

 
LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old 12-23-2012, 10:35 PM Thread Starter
 
Join Date: Dec 2011
Posts: 13
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Replacing the original automatic transmission with a manual one

I'm thinking about swapping out the original two speed automatic transmission in my 65 GTO with a manual one. What are some recommendations on which one to get and where to get the conversion parts?
patty1 is offline  
Sponsored Links
Advertisement
 
post #2 of 4 (permalink) Old 12-24-2012, 08:57 AM
Former Moderator
 
ALKYGTO's Avatar
 
Join Date: Mar 2010
Location: Wentzville, Mo.
Posts: 2,893
Mentioned: 0 Post(s)
Tagged: 1 Thread(s)
Quoted: 16 Post(s)
Garage
If you want a four speed I would recommend a Muncie M-20. Still pretty plentiful and you should be able to procure a servicable gearbox in the $300 - $600 range. I would also recommend getting a factory service manual or the excellent GTO restoration guide by Paul Zazarine for diagrams of all the components.

Aside from the gearbox you will need - A flywheel (factory are cast iron which is fine for stock but you might want to consider steel if your budget allows), a bellhousing ( Pontiac, Olds, and Buick used a specific one, different from Chevrolet. Stock is cast aluminum, aftermarket is steel), clutch and pressure plate (lots of aftermarket support here), throw out bearing, and you'll need a clutch pedal and linkage as well as a different brake pedal (Manual are narrower).

Sticks are a lot more fun to drive if installed right.

If you are interested in an overdrive, I highly recommend the Tremec five speed. That is all dependant on your driving needs, your rear gear and your budget.
ALKYGTO is offline  
post #3 of 4 (permalink) Old 12-24-2012, 11:57 AM
64-67 Expert
 
geeteeohguy's Avatar
 
Join Date: Feb 2008
Location: Fresno, California
Posts: 8,561
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 119 Post(s)
What ALKY said. M 20 is better than an M-21 due to it's lower first gear ratio. In CA, prices are $600 for a beater trans to $1300 for a done one. I've seen nice ones for about $800. The $$$$ is going to be in the pedals, belcrank (Z-bar), frame tab (labor) console (if you want one) and labor in general. This is not a cheap conversion, but it will change the feel of the car entirely. Another option is to pull the 2 speed auto and simply bolt in a TH350 auto trans. This alone will make the car feel like it picked up 100 horsepower. This is a far more cost effective option. (the 4-speed will also make it feel like a real musclecar too!!) Good luck........
geeteeohguy is offline  
 
post #4 of 4 (permalink) Old 12-26-2012, 03:48 AM Thread Starter
 
Join Date: Dec 2011
Posts: 13
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thank you both for the info!
patty1 is offline  
Sponsored Links
Advertisement
 
Reply

  Pontiac GTO Forum > The 1964-1974 Pontiac Tempest, Lemans & GTO > 1964-1974 Tempest, Lemans & GTO Undercarriage, Frame, Transmission and Differential Discussions.

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Pontiac GTO 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
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Automatic to Manual Transmission conversion. JESchulte 1964-1974 Tempest, Lemans & GTO Undercarriage, Frame, Transmission and Differential Discussions. 8 08-02-2016 04:38 PM
67 GTO with leaking transmission; automatic jimmy328 1964-1974 Tempest, Lemans & GTO Undercarriage, Frame, Transmission and Differential Discussions. 6 04-27-2012 11:42 PM
Automatic Vs. Manual Transmission drosene Service, Maintenance and Technical Discussion 17 09-11-2007 05:06 PM
Automatic or Manual Tranmission? I Stall Automatics The Lounge 0 10-30-2005 08:54 PM
2004 GTO..6 speed manual or Automatic? IH2ton6cyl Service, Maintenance and Technical Discussion 5 10-21-2004 11:10 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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

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