Alright so im in a pickle and im not finding any exact answers to my questions. So im hoping to get some answers from yall if possible. So the syncros are going out in my manual fwd transmission on my 1991 Mitsubishi eclipse so i cashed out some $$ and picked up a Turbo transmission instead of a nonturbo model. As far as im aware both transmissions are basically the same except the turbo version is better built. My question is though are there any differences in spline count on the input shaft? Is there any difference? And would I have to buy a different clutch?

420a trans? Not the same as 4g63 trans I do know that there are nt 4g motors you will need some more info to get an answer I'm sure if you gave a transmission code twicks or someone can help more.

Dsm panda said:

420a trans? Not the same as 4g63 trans I do know that there are nt 4g motors you will need some more info to get an answer I'm sure if you gave a transmission code twicks or someone can help more.

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oh no its a 4g63 trans. The turbo trans came from a 91 laser with a 4g63 motor

Clutches are the same, axles may be different.

motomattx said:

Clutches are the same, axles may be different.

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Clutches are NOT THE SAME. Turbo and non turbo have different clutches and flywheels

Yes, the n/a is a flat flywheel and turbo is a stepped flywheel.

Taking the entire clutch setup with flywheel may be necessary for proper engagement. But all of the axles and shifter linkage should otherwise work fine.

pauleyman said:

Clutches are NOT THE SAME. Turbo and non turbo have different clutches and flywheels

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Clutch kits ARE the same, the flywheel is part of the engine.

https://www.ebay.com/itm/Competitio...Clutch-1990-1994-Eclipse-1G-DSM-/123404998537

Mitsi1991 said:

are there any differences in spline count on the input shaft? Is there any difference?

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According to ACT, Turbo models and non-turbo model have the same spline count and diameter on the input shaft but have different friction surface diameter on clutches. Non-turbo has a smaller friction surface diameter than turbo models.

motomattx said:

https://www.ebay.com/itm/Competitio...Clutch-1990-1994-Eclipse-1G-DSM-/123404998537

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It seems that the vendor misinform it. The clutch kit for non-turbo have a different part number.

motomattx said:

Clutch kits ARE the same, the flywheel is part of the engine.

https://www.ebay.com/itm/Competitio...Clutch-1990-1994-Eclipse-1G-DSM-/123404998537

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No. All turbo are the same. Turbo and non turbo are definitely different.

We've ran turbo on non turbo, that I can tell you, dont remember the specifics its been a few years back.

Transmission mount is different on autos .not sure about manuals,you might want to look into that

motomattx said:

We've ran turbo on non turbo, that I can tell you, dont remember the specifics its been a few years back.

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They're different. Not sure what Frankenclutch combo you might've used in the past, but the non-turbo model is an 8-1/2" disc with a flat flywheel and the turbo model is an 8-7/8" stepped flywheel. You cannot mix-and-match parts between the two.

Right, but you can run a turbo flywheel/clutch on a non turbo trans, and a non turbo clutch/flywheel on a turbo trans.

As long as they are all fwd and came out of a 4g6x car it will work.

Crackerman said:

Right, but you can run a turbo flywheel/clutch on a non turbo trans, and a non turbo clutch/flywheel on a turbo trans.

As long as they are all fwd and came out of a 4g6x car it will work.

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Yes, yes you can!

Generally speaking, no you cannot. If you use a non-turbo clutch and flywheel in a FWD turbo transmission, the OEM starter will be out of position and will not engage the flywheel to start the car. If, on the other hand, you try to use a turbo clutch and FWD turbo flywheel in a non-turbo (FWD) transmission, you definitely cannot as the bellhousing will not fit over the flywheel. Physically, it is impossible.

There are some possibilities with the AWD flywheel, but that is not what this thread is about.

In my Colt I had several transmissions. I kept hearing about "differences".

But when I popped another f5m33, I stabbed a km210 in, which is the original c53a turbo trans, it worked without issue using the fwd starter plate/steel shim. I bent the shift fork badly in that one and was relegated to a junkyard 4g63 n/a trans until a rebuild came back from tre. Again, no other modifications except swap CSM shift linkage onto the shift rail, and adjust the cables.

Did I get a bastard trans? Doubtful, as it wasn't a f5m33, although km210 was cast into other parts of the trans, i do recall it wasn't stamped with it in the designated area.

Upon driving, and later disassembly, I found it was built for much lighter duty than the km210 and f5m33.

Crackerman said:

In my Colt I had several transmissions. I kept hearing about "differences".

But when I popped another f5m33, I stabbed a km210 in, which is the original c53a turbo trans, it worked without issue using the fwd starter plate/steel shim. I bent the shift fork badly in that one and was relegated to a junkyard 4g63 n/a trans until a rebuild came back from tre. Again, no other modifications except swap CSM shift linkage onto the shift rail, and adjust the cables.

Did I get a bastard trans? Doubtful, as it wasn't a f5m33, although km210 was cast into other parts of the trans, i do recall it wasn't stamped with it in the designated area.

Upon driving, and later disassembly, I found it was built for much lighter duty than the km210 and f5m33.

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Thats correct, you need whichever starter plate matched to whichever flywheel/clutch setup your going to be using.

Early model 1Gs show coming with variations of KM transmissions -- the KM206-0-DJNS for the non-turbo and the KM215-0-ANS for the turbo. I wouldn't expect to come across too many of these anymore.

The C53A Colt / Mirage used a KM210-0-BQL transmission that, yes, uses a 215mm diameter clutch disk and has the same diameter flywheel (same number of teeth on the ring gear) as the FWD turbo DSM. It also used the same starter plate and same pressure plate. That's pretty self-explanatory as to why it bolted up and worked. The other one from some random junkyard 4G63 N/A - if it worked, there's a reason. I guarantee you cannot use a F5M22 non-turbo transmission from a DSM on a FWD turbo flywheel from a DSM. See: what are ALL the differences from the 4g63 to 4g63t.

The starter plate and flywheel need to match the transmission. The clutch disk and pressure plate need to match the flywheel and the transmission.