1G How To: 2g transmission in a 1g FWD!

If your interested in putting a 2g transmission in a 1g you have probably heard it can be done in a AWD but what about the FWD? I personally have not found one writeup of it being done on a FWD so I took my chance since I found a nice 2g tranny for cheap.

Here is what you are gonna have to do to make this work.
1. you need to replace the 2g speed sensor to the 1g cable speed sensor.

Replaced with 1gen cable speed sensor

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2. Clutch cylinder bolts off the 1g are a little to short to fit the 2g trans. Luckily mine came with the clutch cylinder so I used the bolts on there.

3. You need to switch the 2g shift arm with the 1g up and down shift arm.
You also have to bend the 2g left to right shift arm to look like the 1g. I don't know if you can remove the 1g left to right arm.

I used a pair of vice grips and bent the hell out of it. It was not easy and it looks really banged up but it shifts perrrrfect

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4. Your gonna have to make a new hole in the plate/shield in between the tranny and block for the starter holes. It is off by just a bit. MODERATOR'S NOTE: The correct way to do this is to simply buy a 2G FWD turbo starter plate. That part number is MD194962 and should only be ~$20 brand new.

5. The counter-weight on the 2g left to right shift arm had to be cut off on mine due to the fact that it hit my coolant hose and would not shift all the way. I just used a hack saw.

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6. I used my 1g reverse switch because it fit and I'm not sure if the 2g one will work, I didn't try.

fit right in!

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7. !!!IMPORTANT!!! Now I heard you can do several things to make this work. Right now I'm still looking for a set of axles but I will update when I get them. The 90-92 transmissions used smaller axles that will NOT fit in the 2g transmission. I am looking for a set of 93-94 axles that are bigger and have heard these WILL work in a 2g transmission. UPDATE: 2g axles WILL work, the drivers side fits and is not to long however the passenger side will need to be modified slightly. I'll update again.

If your not sure what year transmission you have just read the label on the top of the tranny. If your tranny has the SPZV I believe these are the 90-92 transmissions. The SPQV are the 93-94. Don't hold me to that thought

8. Remove all the mounts off the 2g transmission, you only need the 1 top mount off of your 1g. Don't worry about the big screw looking thing the mount will just dodge it

The mount

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ITS IN!!

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[1g93gst]

I performed this when I was 19 years old! I am now 32 and can't believe I found my old account. Moved on from DSMs but still love cars and learned so much on this platform. Just converted a 66 mustang from an automatic to 5 speed.

Look at all those grammar mistakes!

 

[Tobey 84]

Working on a similar swap having a hard time with the passenger side CV axle. How did you modify yours? Driver side went right in passenger side seems to be too long.

 

[talon749]

I used a shaft from a 94, that has the big splines and the right length for the 1g chassis. I think this is the one I ended up using. The shaft is a rebuilt OEM Mitsubishi, so I don't feel awful about the quality.

 

[mitsubishikid]

One question I have is, could you possibly swap the 25 spline diff ring section off of the diff from say a '90-'92 1g GST transmission into the 2g case in that case you could then use the stock 25 spline 1g axles instead of the 27 spline 2g GST axles?

Just posing this hypothetical question in case someone wants to run a 2g GST transmission in an early 1g GST and is willing to take the transmission apart. It also might help people that have the early '89-'92 CSM cars Colt/Summit/Mirage.

 

[pauleyman]

One question I have is, could you possibly swap the 25 spline diff ring section off of the diff from say a '90-'92 1g GST transmission into the 2g case in that case you could then use the stock 25 spline 1g axles instead of the 27 spline 2g GST axles?

Just posing this hypothetical question in case someone wants to run a 2g GST transmission in an early 1g GST and is willing to take the transmission apart. It also might help people that have the early '89-'92 CSM cars Colt/Summit/Mirage.

You could but it's a lot easier to get axles. At least for 1g because 1g also came with larger axles. You do have a point with CSM but even in those cases I would try and run the larger ones if I could.

 

[mitsubishikid]

You could but it's a lot easier to get axles. At least for 1g because 1g also came with larger axles. You do have a point with CSM but even in those cases I would try and run the larger ones if I could.

Yeah the advantage to taking it apart and swapping the 27 spline out for the 25 spline being you could run the dsm or csm equal length 25 spline halfshaft i think a 27 spline hack exists to run 3kgt equal axles but i think a custom block bracket is required.