Tranny Compatibility On 1.8 [Archive] - DSM Forums: Mitsubishi Eclipse, Plymouth Laser, and Eagle Talon Forum: DSMtalk.com

: Tranny Compatibility On 1.8


MrDSM
12-24-2002, 11:27 AM
I was wondering if anyone knows if a transmission off of a 2.0 will fit on my 1.8? Is the bell housing and shafts the same? I am aware of the difference in the numbers of splines. I want to put a higher geared tranny in so I have some more top end when i turbo my 1.8. Any help is greatly appreciated.

AWD Terror
12-24-2002, 11:42 AM
Moving to N/T Tech.... zzzz

Blackboost
12-24-2002, 12:34 PM
Originally posted by MrDSM
I was wondering if anyone knows if a transmission off of a 2.0 will fit on my 1.8? Is the bell housing and shafts the same? I am aware of the difference in the numbers of splines. I want to put a higher geared tranny in so I have some more top end when i turbo my 1.8. Any help is greatly appreciated.

Yes, it will fit. Check the "All 1.8 things" thread in this forum for more info...

indy1979
12-25-2002, 01:53 PM
I put a 1.8 tranny on my 2.0 when I first got it running and I had starter engagment problems. You may have to fiddle with the starter to even get it close to engaging the flywheel. They will bolt up yes, but since the flywheels on the 1.8s are smaller in diameter you may have starter problems.

Sam

MrDSM
12-26-2002, 09:38 AM
I read the all things 1.8 thread and it says that you have to use a flywheel and clutch off of a 2.0 - thats impossible. The 1.8 flywheel is a 5 bolt pattern and the lowest for 4G63 is 6 bolt so that surely won't work. Explain these starter problems if im using the 1.8 flywheel and nothing in the starter setup has changed? Thanks

MrDSM
12-26-2002, 09:40 AM
Oh i get it, you think that I want to put the 1.8 tranny on the 2.0 - Nope, I want to put the 2.0 tranny on my 1.8 so its ready for turbo.

Blackboost
12-26-2002, 01:56 PM
Originally posted by MrDSM
Oh i get it, you think that I want to put the 1.8 tranny on the 2.0 - Nope, I want to put the 2.0 tranny on my 1.8 so its ready for turbo.

You can do it...;)

indy1979
12-26-2002, 05:19 PM
ok, lets see if I can spell this out any clearer. When I put my 1.8 tranny on a 2.0 engine my starter was grinding on the back of the flywheel because the starter was sitting too far down to properly engage the flywheel.

Now the 1.8 flywheel is "SMALLER" in diameter than the 2.0. If you take a 2.0 tranny, which has a larger bellhousing to accomodate for the larger flywheel, and put it on a 1.8 engine the starter is going to be sitting too high. It will sit above the flywheel and "POSSIBLY" not even engage the flywheel.

Thats what I'm trying to tell you.

To double check this, take the flywheel off the 1.8 engine and bolt the clutch up to it while its off. Then put the flywheel/clutch assembly on the input shaft of the tranny. Now bolt the starter to the tranny and see how much gap there is in between the starter gear and the flywheel teeth. I'm guess about 1/2 an inch to 3/4 of an inch gap.

Sam

MrDSM
12-26-2002, 05:24 PM
anyone know if there are any differences in the starter for the 2.0 and the starter for the 1.8?

indy1979
12-26-2002, 05:27 PM
None what so ever.

Sam

MrDSM
12-26-2002, 05:32 PM
shit, then that may be a challenge to get a bigger gear on that starter somehow. Thanks indy - maybe I should just have TRE build it and make some taller gear ratios if they can.

indy1979
12-26-2002, 05:34 PM
One thing you can look at to see if it will work is try swapping the bellhousings. Put the 1.8 bellhousing on the 2.0 tranny. That would give you no starter problems.

Sam