1993 Eclipse 1.8->2.0 auto trans swap.

[amakar]

What if any are the differences between a 1.8 automatic and a 2.0 automatic first gen? I've removed a 1.8 auto and was about to put it into a 2.0 car when I was told they are different. If they are different can the swap still be made?

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[josh2ndgen]

According to my Chiltons manual they are diffrent. It doesn't say about them even being to bolt up but it is giving diffrent part numbers. So I would think even if it does bolt up it may be alot diffrent internally.

 

[dylnwit]

I would not be surprised if it bolts up, from what I've read the manual trans from a 1.8 will fit the 2.0 and vice-versa, so i would ASSUME that the auto won't be any different. Be prepared to replace it quickly though. Since the part numbers are different, then the internals are probably different. I would think that the 1.8's trans wouldn't be nearly as strong as the 2.0's because since there's less torque with the 1.8 cheaper components could be used. Should work for a while without hard launches, and will probably do fine at least till you can rebuild your old one.

 

[DSM1G90]

Both motors (the 4G37-1.8L and the 4G63NT-2.0L ) used the same F4A22 tranny for the 1G style years.

Turbo motors had a stronger auto tranny just as the manual tranny is a stronger version (F5M33) with a different final drive ratio for the turbo motor.

If you head to the 2G body, then different trannys are apparent.

 

[eeeewidner]

Yes they will bolt up and be functional, if you can try to use the 2.0 torque converter. The stall speeds are different.