What's the difference in gear ratios between the ZC and SI tranny's? Will it be worth it to switch out my Si tranny for a ZC one? From a 89' rex.

 

ZC has better 1-4 gears, but Si has a better 5th and final drive.

Plus if you put a ZC tranny in you have to change the axles to accomidate the Intermediate shaft, it's a better axle set up (less torque steer) but more work/$ involved.

if you have the skills or $$ for a shop to do it, take the 1-4 gears out of the ZC and put them into the Si tranny.

if you don't want to crack open any cases, I'd stick with the Si tranny.


edit: here's the numbers:
Si ZC
1st 3.25 3.25
2nd 1.894 1.944
3rd 1.259 1.346
4th 0.937 1.033
5th 0.771 0.878
final 4.25 3.888


[Modified by thumpu77, 10:05 PM 2/20/2003]

 

Thanx for the info!