1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Auto-manual conversion question

Thread Tools
 
Search this Thread
 
Old 10-06-19, 04:34 AM
  #1  
Admitted 'rexaholic'

Thread Starter
 
mwpayne's Avatar
 
Join Date: May 2002
Location: Seymour, TN
Posts: 2,204
Received 17 Likes on 16 Posts
Auto-manual conversion question

I have I think everything I need to install a manual trans in my auto 79, will I need new clutch plate bolts?
Thanks!
Old 10-06-19, 07:00 AM
  #2  
Have RX-7, will restore


iTrader: (91)
 
mazdaverx713b's Avatar
 
Join Date: Oct 2003
Location: Ohio
Posts: 21,710
Received 1,051 Likes on 891 Posts
You will need them only if you don't currently have them as they are not torque to yield bolts. There is also a lock washer on each bolt that you will need. And be sure to follow the torque spec when torquing the pressure plate bolts.
Old 10-06-19, 08:11 AM
  #3  
Admitted 'rexaholic'

Thread Starter
 
mwpayne's Avatar
 
Join Date: May 2002
Location: Seymour, TN
Posts: 2,204
Received 17 Likes on 16 Posts
Originally Posted by mazdaverx713b
You will need them only if you don't currently have them as they are not torque to yield bolts. There is also a lock washer on each bolt that you will need. And be sure to follow the torque spec when torquing the pressure plate bolts.
Great thanks, I’ll need to get those ordered
Old 10-06-19, 02:20 PM
  #4  
Have RX-7, will restore


iTrader: (91)
 
mazdaverx713b's Avatar
 
Join Date: Oct 2003
Location: Ohio
Posts: 21,710
Received 1,051 Likes on 891 Posts
Also of note, two of the bolts are longer and will only thread in their deeper threaded hole on the flywheel.
Old 10-06-19, 04:11 PM
  #5  
ancient wizard...

 
GSLSEforme's Avatar
 
Join Date: Sep 2014
Location: Maryland
Posts: 2,335
Received 256 Likes on 209 Posts
Shouldered bolts
The following users liked this post:
mazdaverx713b (10-07-19)
Old 10-07-19, 05:45 AM
  #6  
Have RX-7, will restore


iTrader: (91)
 
mazdaverx713b's Avatar
 
Join Date: Oct 2003
Location: Ohio
Posts: 21,710
Received 1,051 Likes on 891 Posts
Exactly. Two of the bolts are shouldered bolts. The two shouldered bolts are the longer of the set.
Old 12-19-19, 05:36 PM
  #7  
Admitted 'rexaholic'

Thread Starter
 
mwpayne's Avatar
 
Join Date: May 2002
Location: Seymour, TN
Posts: 2,204
Received 17 Likes on 16 Posts
Pedal swap question

How difficult is the auto to manual pedal assembly swap? I have the manual set, will I need more bolts etc since it’s a bigger assembly?
Any tips appreciated!
Old 12-20-19, 05:40 AM
  #8  
Have RX-7, will restore


iTrader: (91)
 
mazdaverx713b's Avatar
 
Join Date: Oct 2003
Location: Ohio
Posts: 21,710
Received 1,051 Likes on 891 Posts
You will need a brake and clutch pedal assembly. I think when I did mine I swapped in a manual brake pedal and through bolt and left the mounting bracket as it was the same as the manual transmission bracket.... you will have to swap in the entire clutch pedal assembly which is not terribly difficult. It is bolted to the dash frame if I remember correctly.
Old 12-20-19, 05:43 AM
  #9  
Have RX-7, will restore


iTrader: (91)
 
mazdaverx713b's Avatar
 
Join Date: Oct 2003
Location: Ohio
Posts: 21,710
Received 1,051 Likes on 891 Posts
Here is a link to the threads that I created when I did my auto to manual transmission swap. The pictures are blurry courtesy of Photobucket but may still help some.

https://www.rx7club.com/1st-generati...-begun-783169/
Old 12-20-19, 01:26 PM
  #10  
Admitted 'rexaholic'

Thread Starter
 
mwpayne's Avatar
 
Join Date: May 2002
Location: Seymour, TN
Posts: 2,204
Received 17 Likes on 16 Posts
Awesome thread thanks! I don’t have the manual starter bolts, can I obtain those locally?


QUOTE=mazdaverx713b;12386277]Here is a link to the threads that I created when I did my auto to manual transmission swap. The pictures are blurry courtesy of Photobucket but may still help some.

https://www.rx7club.com/1st-generati...-begun-783169/[/QUOTE]
Old 12-21-19, 05:39 AM
  #11  
Have RX-7, will restore


iTrader: (91)
 
mazdaverx713b's Avatar
 
Join Date: Oct 2003
Location: Ohio
Posts: 21,710
Received 1,051 Likes on 891 Posts
You can try the local parts stores but it's pretty doubtful that you will source them locally. Mazda may still offer them for sale. I can look up the part numbers if you'd like. Or create a want to buy ad in the 1st gen parts section if they are NLA from Mazda.
Old 12-28-19, 03:02 PM
  #12  
Admitted 'rexaholic'

Thread Starter
 
mwpayne's Avatar
 
Join Date: May 2002
Location: Seymour, TN
Posts: 2,204
Received 17 Likes on 16 Posts
Pedal assy swap

Does the steering column need to come out to swap the pedal assy? I’ve got all the bolts out it’s all loose, can’t drop pedal assy frame down far enough due to steering column. Advise appreciated!
Old 12-28-19, 05:19 PM
  #13  
Out In the Barn


iTrader: (9)
 
KansasCityREPU's Avatar
 
Join Date: Mar 2005
Location: KC
Posts: 6,053
Received 1,014 Likes on 800 Posts
On my 1985, I only had to remove the long bolt that holds the pedals and replace with the new clutch and brake pedals. Didn't have to remove the box. Hopefully the 1979/1980 are just as easy. I took some captures for the 1979-1980 parts manual that shows which parts are auto and which are manual. The box itself is the same.

I also want to extend my powder coating to your project. Just pack a box up with all the parts you want coated and pay return shipping and I'll do them.




Last edited by KansasCityREPU; 12-28-19 at 05:57 PM.
Old 12-28-19, 05:57 PM
  #14  
Admitted 'rexaholic'

Thread Starter
 
mwpayne's Avatar
 
Join Date: May 2002
Location: Seymour, TN
Posts: 2,204
Received 17 Likes on 16 Posts
Originally Posted by KansasCityREPU
On my 1985, I only had to remove the long bolt that holds the pedals and replace with the new clutch and brake pedals. Didn't have to remove the box. Hopefully the 1979/1980 are just as easy.
Looks like this 79 is different, no long bolt.
Old 12-28-19, 06:13 PM
  #15  
Out In the Barn


iTrader: (9)
 
KansasCityREPU's Avatar
 
Join Date: Mar 2005
Location: KC
Posts: 6,053
Received 1,014 Likes on 800 Posts
Originally Posted by mwpayne
Looks like this 79 is different, no long bolt.
Looks like the everything is the same except the auto doesn't have the clutch pedal and it's associated hardware. I've looked over the parts fiche but can't see what replaces the clutch pedal portion on the bolt. I bet there is just a spacer on the auto one.
Old 12-28-19, 06:26 PM
  #16  
Admitted 'rexaholic'

Thread Starter
 
mwpayne's Avatar
 
Join Date: May 2002
Location: Seymour, TN
Posts: 2,204
Received 17 Likes on 16 Posts
Originally Posted by KansasCityREPU
Looks like the everything is the same except the auto doesn't have the clutch pedal and it's associated hardware. I've looked over the parts fiche but can't see what replaces the clutch pedal portion on the bolt. I bet there is just a spacer on the auto one.
Could be, I’ll look again tomorrow. Might post a pic of the manual set I have .
Really appreciate the help!
Old 01-04-20, 03:01 PM
  #17  
Junior Member
 
James Gilbraith's Avatar
 
Join Date: Dec 2019
Location: Summerland
Posts: 25
Received 1 Like on 1 Post
Are the two longer bolts the top ones?
Old 01-04-20, 07:35 PM
  #18  
Slowly getting there...
iTrader: (1)
 
Maxwedge's Avatar
 
Join Date: Jun 2018
Location: SE PA
Posts: 1,638
Received 352 Likes on 259 Posts
I have an auto pedal assembly here you can look at for comparison. I think it's from an '83. I believe the long bolt KC referred to is the one the pedals hang / pivot on.




Old 01-05-20, 09:19 AM
  #19  
Admitted 'rexaholic'

Thread Starter
 
mwpayne's Avatar
 
Join Date: May 2002
Location: Seymour, TN
Posts: 2,204
Received 17 Likes on 16 Posts
Yes I see it now, that oughta work.
Old 01-05-20, 09:42 AM
  #20  
Out In the Barn


iTrader: (9)
 
KansasCityREPU's Avatar
 
Join Date: Mar 2005
Location: KC
Posts: 6,053
Received 1,014 Likes on 800 Posts
I found this pic of the pedal layout when I did my 1985 auto-to-manual swap.



Last edited by KansasCityREPU; 01-05-20 at 09:55 AM.
Old 01-11-20, 09:54 AM
  #21  
Admitted 'rexaholic'

Thread Starter
 
mwpayne's Avatar
 
Join Date: May 2002
Location: Seymour, TN
Posts: 2,204
Received 17 Likes on 16 Posts
Booster too big?

I think this is where the clutch master will mount, the brake booster seems to overlap ?
Old 01-11-20, 10:08 AM
  #22  
Out In the Barn


iTrader: (9)
 
KansasCityREPU's Avatar
 
Join Date: Mar 2005
Location: KC
Posts: 6,053
Received 1,014 Likes on 800 Posts
You need a brake booster from a 1979-1980 manual car. I thought the 1979-1980 boosters where the same between auto and manual. Not sure if that one is factory for this year or not. The 1979-1980 brake booster is really small compared to the 1981-1985.

Reference for a 1980



Last edited by KansasCityREPU; 01-11-20 at 10:26 AM.
Old 01-11-20, 11:04 AM
  #23  
Slowly getting there...
iTrader: (1)
 
Maxwedge's Avatar
 
Join Date: Jun 2018
Location: SE PA
Posts: 1,638
Received 352 Likes on 259 Posts
Yikes, that booster does look big. On an '85 (pictured below) they're close but not overlapping like that. I don't think you can get a new or reman booster anymore, but there are threads about using boosters from other cars. Also there are adapters to eliminate the booster al together, if you want a good leg workout.


Old 01-11-20, 12:54 PM
  #24  
Out In the Barn


iTrader: (9)
 
KansasCityREPU's Avatar
 
Join Date: Mar 2005
Location: KC
Posts: 6,053
Received 1,014 Likes on 800 Posts
The 1979 auto and manual share the same brake booster. Found this on rock auto. Factory part number is 887143800A or 8871-43-800A

https://www.rockauto.com/en/moreinfo.php?pk=258873

Old 01-11-20, 01:30 PM
  #25  
Admitted 'rexaholic'

Thread Starter
 
mwpayne's Avatar
 
Join Date: May 2002
Location: Seymour, TN
Posts: 2,204
Received 17 Likes on 16 Posts
Originally Posted by KansasCityREPU
The 1979 auto and manual share the same brake booster. Found this on rock auto. Factory part number is 887143800A or 8871-43-800A

https://www.rockauto.com/en/moreinfo.php?pk=258873
Thanks! I read somewhere that the 80 booster is an improvement over the 79, any truth to that?


Quick Reply: Auto-manual conversion question



All times are GMT -5. The time now is 07:32 PM.