Hello every one i have been able to locate a mint not dents no rust anywear 1978 280z 4 speed for 400 dollars minus the jaguar wheels that are on the car im thinking very hard about droping the 1982 280zx turbo engine tranny ecu wireing and possable all the interior wireing to the 280z since the 280z is not beat up as bad as the 1982 is... the 82 is horrable bondo rust etc.


Now witch rear diff. would i really want to use ? the 78 with the r180 ?
Or the turbo with the r200 ? Or should i just experament to let every one know what i think ? But honestly i want evey ones opion.

 

#1... Just swap in the engine ECU wiring... leave the 280z body wiring alone.

#2... Leave the diff alone unless you plan on high hp.

#3... Use this tranny / diff calculator: http://www.geocities.com/z_design_studio/

 

All hail that geocities, i think it's on every z-car website. in the world lol

 

I thought all 1975-78 cars had the R200 3.54

did you verify it is an R180?

 

Sorry for thread jacking, but does anyone know the ratios for the automatic transmissions? I've been searching and can't seem to find the ratios for the autos. I swear I found it once before, but maybe I'm dreaming.

 

I believe the auto tranny is the "3N71B" ( http://forums.hybridz.org/showthread.php?t=106115 )

http://www.datsuns.com/Tech/datsun_transmissions.htm

 

The answers you seek are right here in THIS forum the 280ZX Forum ZX Specifications:

TRANSMISSION
Datsun used 4 different transmissions in the 280zx. 3 manuals and 1 autmatic.
The 5 speed used in the 80-83 years were all identicle to each other except for the fact that the 1980 model used a different 5th gear ratio.
Automatic (79-83): 1st Gear: 2.458, 2nd: 1.458, 3rd: 1.000, Reverse: 2.182
Manual 4 Speed (79 only): 1st Gear: 3.321, 2nd: 2.077, 3rd: 1.308, 4th: 1.000, Reverse: 3.382
Manual Nissan 5 Speed (79 only): 1st Gear: 3.321, 2nd: 2.077, 3rd: 1.308, 4th: 1.000, 5th: 0.864, Revers: 3.382
The 4 and 5 speeds used in the 79 model were virtually the same with the exception of one having an OD 5th gear.
Manual Nissan 5 Speed (80 only): 1st Gear: 3.062, 2nd: 1.858, 3rd: 1.308, 4th: 1.000, 5th: 0.773, Reverse: 3.026
Manual Nissan 5 Speed (81-83 non turbo): 1st Gear: 3.062, 2nd: 1.858, 3rd: 1.308, 4th: 1.000, 5th: 0.745, Reverse: 3.026
The 5 speed used in the 80-83 years were all identicle to each other except for the fact that the 1980 model used a different 5th gear ratio and synchro assemby.
Manual T-5 5 speed (82-83 Turbo): 1st Gear: 3.500, 2nd: 2.144, 3rd: 1.375, 4th: 1.000, 5th: 0.780, Reverse:

 

I knew I saw it somewhere on here!