[FourthGenHatch]

Get the ZC tranny because with the ZC tranny you can use an Intermediate Shaft which eliminates torque steer. And the Integra axles you use are 90-93 Integra Axles.

As for ZC tranny vs. Si I'm pretty damn sure the ZC has the lowest gearing of any D-series tranny. They say the Si one is better because it has a higher 5th gear. I know with my ZC tranny if I'm doing 80mph my tach is at 4k RPMs. Pretty high. With my DX one it was like 2k something. The ZC is awesome for around town but you might suffer gas mileage, but who cares.

88-91 Civic/CRX DX
3.25
1.894
1.259
0.937
0.771
3.88



88-91 Civic/CRX SI
3.25
1.894
1.259
0.937
0.771
4.25



??? JDM DOHC ZC
3.25
1.944
1.250
0.909
0.878
3.88

The actual gearing of the Si might be more but the final drive of the ZC is much lower so that is what is going to be the deciding factor.

The best tranny is actually the ZC housing and 1-4 with Si 5th and final drive.