280zx 5sp in a 73 240?

[e_racer1999]

Not quite, Jason.

It should read:

from zx - tranny

from z - everything else

everything left over from zx goes to zbane for free

the end

of course, how could i forget

[Sailor Bob]

Jim I'm on the cusp of doing the 82 5spd into the 77 Z - clutch is finally failing and the tranny has been sitting on the garage floor for a year, forced to do it. What about the r200 3.545/82 5 spd combo.

[jmortensen]

Jim I'm on the cusp of doing the 82 5spd into the 77 Z - clutch is finally failing and the tranny has been sitting on the garage floor for a year, forced to do it. What about the r200 3.545/82 5 spd combo.

I think that's to me... but the name is Jon.

Anyway that's a sluggish combo. While it would probably get you some good mileage numbers, it's too tall a rear gear for good acceleration. 3.90 is the stock ZX rear gear ratio, 4.11 is good. I ran 3.70 for a long time and that was OK, but not great. I could really feel that it was too tall when autoxing. I wouldn't go any taller than 3.70.

It really shouldn't be hard to find a diff with the right ratio.