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

1984 RX7 Automatic to Manual conversion

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Old Oct 31, 2024 | 11:27 AM
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1984 RX7 Automatic to Manual conversion

Hi! All, is it worthy swapping the automatic transmission to a manual on my mazda or is it better selling it and buy a manual?
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Old Oct 31, 2024 | 11:42 AM
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Look at post 4 in this thread.
https://www.rx7club.com/1st-gen-gene...tions-1120671/

I've done this swap on my 1985 GSL. To do it right, it required welding in the trans mounts.

I followed the thread referenced and didn't have good results. The issue was that the platte to span the mounts caused the trans to move too much. The drive shaft was slapping the heat shield. I didn't like all that deflection/movement.

For the clutch pedal, take the driver's seat out to make room. Remove the long bolt that the pedals pivot on. Do not take out the pedal box. Replace with longer manual bolt and add new clutch pedal.

Parts:
* 1984/1985 Manual Drive Shaft - Might as well install new U Joints - yes the staked u joints can be removed.
* 1984/1985 Flywheel or lightweight flywheel using the auto counter weight
* New eccentric shaft pilot bearing - autos don't have them
* Clutch Master/Slave
* 1984/1985 Manual Trans
* Manual clutch cross member brace
* Long bolt and clutch pedal
* Clutch pedal switch
* Hard line between clutch maters/slave
* Clutch master/slave soft line - get steal braided
* New clutch kit (clutch plate, clutch disc, throwout bearing)

TIG welded

Drivers Side


Passenger Side

Last edited by KansasCityREPU; Oct 31, 2024 at 05:33 PM.
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Old Oct 31, 2024 | 12:11 PM
  #3  
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Rx7 automatic to manual

Originally Posted by KansasCityREPU
Look at post 4 in this thread.
https://www.rx7club.com/1st-gen-gene...tions-1120671/

I've done this swap on my 1985 GSL. To do it right, it required welding in the trans mounts.

I followed the thread referenced and didn't have good results. The issue was that the platte to span the mounts caused the trans to move too much. The drive shaft was slapping the heat shield. I didn't like all that deflection/movement.

For the clutch pedal, take the driver's seat out to make room. Remove the long bolt that the pedals pivot on. Do not take out the pedal box. Replace with longer manual bolt and add new clutch pedal.

Parts:
* 1984/1985 Manual Drift Shaft - Might as well install new U Joints - yes the staked u joints can be removed.
* 1984/1985 Flywheel or lightweight flywheel using the auto counter weight
* New eccentric shaft pilot bearing - autos don't have them
* Clutch Master/Slave
* 1984/1985 Manual Trans
* Manual clutch cross member brace
* Long bolt and clutch pedal
* Clutch pedal switch
* Hard line between clutch maters/slave
* Clutch master/slave soft line - get steal braided
* New clutch kit (clutch plate, clutch disc, throwout bearing)

TIG welded

Drivers Side


Passenger Side
thank you so much for the info. I.will not do the conversion thanks to your details.
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Old Oct 31, 2024 | 05:19 PM
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What's weird is both of my series 3s have both sets of crossmember mounts.
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