Kingtal0n

here are match ups:

T-56 (1994-1997) final gearing ratio, assuming .50:1, with a 255/60/R15 Tire Size:
2.73 rear gear 1.365:1 at 60 MPH thats 1017 Rpms. at 80 MPH thats 1356 RPM. at 100 MPH thats 1695 RPM.
3.08 "" 1.540:1 at 60 MPH thats 1147 Rpms. at 80 MPH thats 1530 RPM. at 100 MPH thats 1913 RPM.
3.23 "" 1.615:1 at 60 MPH thats 1203 Rpms. at 80 MPH thats 1605 RPM. at 100 MPH thats 2006 RPM.
3.48 "" 1.740:1 at 60 MPH thats 1296 Rpms. at 80 MPH thats 1729 RPM. at 100 MPH thats 2161 RPM.
3.73 "" 1.865:1 at 60 MPH thats 1390 Rpms. at 80 MPH thats 1853 RPM. at 100 MPH thats 2316 RPM.
4.11 "" 2.055:1 at 60 MPH thats 1531 Rpms. at 80 MPH thats 2042 RPM. at 100 MPH thats 2552 RPM.
4.54 "" 2.270:1 at 60 MPH thats 1691 Rpms. at 80 MPH thats 2255 RPM. at 100 MPH thats 2819 RPM.
5.11 "" 2.555:1 at 60 MPH thats 1904 Rpms. at 80 MPH thats 2539 RPM. at 100 MPH thats 3174 RPM.

700R4 final gearing ratio, assuming .73:1, with a 255/60/R15 Tire Size:
2.73 rear gear 1.992:1 at 60 MPH thats 1485 Rpms. at 80 MPH thats 1980 RPM. at 100 MPH thats 2475 RPM.
3.08 "" 2.248:1 at 60 MPH thats 1675 Rpms. at 80 MPH thats 2234 RPM. at 100 MPH thats 2793 RPM.
3.23 "" 2.357:1 at 60 MPH thats 1757 Rpms. at 80 MPH thats 2343 RPM. at 100 MPH thats 2929 RPM.
3.48 "" 2.540:1 at 60 MPH thats 1860 Rpms. at 80 MPH thats 2481 RPM. at 100 MPH thats 3101 RPM.
3.73 "" 2.722:1 at 60 MPH thats 2029 Rpms. at 80 MPH thats 2706 RPM. at 100 MPH thats 3382 RPM.
4.11 "" 3.000:1 at 60 MPH thats 2236 Rpms. at 80 MPH thats 2981 RPM. at 100 MPH thats 3727 RPM.
4.54 "" 3.314:1 at 60 MPH thats 2470 Rpms. at 80 MPH thats 3293 RPM. at 100 MPH thats 4117 RPM.
5.11 "" 3.730:1 at 60 MPH thats 2780 Rpms. at 80 MPH thats 3707 RPM. at 100 MPH thats 4634 RPM.

Th350 final gearing ratio, assuming 1.0:1, with a 255/60/R15 Tire Size:
2.73 rear gear 2.73:1 at 60 MPH thats 2034 Rpms. at 80 MPH thats 2713 RPM. at 100 MPH thats 3391 RPM.
3.08 "" 3.08:1 at 60 MPH thats 2295 Rpms. at 80 MPH thats 3060 RPM. at 100 MPH thats 3826 RPM.
3.23 "" 3.23:1 at 60 MPH thats 2407 Rpms. at 80 MPH thats 3210 RPM. at 100 MPH thats 4012 RPM.
3.48 "" 3.48:1 at 60 MPH thats 2549 Rpms. at 80 MPH thats 3458 RPM. at 100 MPH thats 4248 RPM.
3.73 "" 3.73:1 at 60 MPH thats 2780 Rpms. at 80 MPH thats 3706 RPM. at 100 MPH thats 4633 RPM.
4.11 "" 4.11:1 at 60 MPH thats 3063 Rpms. at 80 MPH thats 4084 RPM. at 100 MPH thats 5105 RPM.
4.54 "" 4.54:1 at 60 MPH thats 3383 Rpms. at 80 MPH thats 4511 RPM. at 100 MPH thats 5639 RPM.
5.11 "" 5.11:1 at 60 MPH thats 3808 Rpms. at 80 MPH thats 5078 RPM. at 100 MPH thats 6348 RPM.

As you can see, the 94-up model T-56 is AWSOME for highway driving.with 4.11 gearing we are at almost the same RPM on the highway as a 700R4 with 2.73 gearing. and as for the Th350... well i wouldnt even consider it a highway tranny now-a-day.

Sitting Bull

Thanks, that's excellent info to store away for future reference

1991tealRSt-topGuy

i went with the TH350 because i hear too much talk about the 700's problems, and i'm not too crazy about the gearing from 1st to 2nd in a 700

my Z28 really isnt being built for hiway use so, i guess i made the right choice

i really wanted a T56, but i dont have those kind of funds at the moment