differential question

[280zgod]

hey everyone ive got a 75 280z with a 5spd not sure if thats an original but anyhow. i wanted to ask you guys how to check for which differential i have r200 r180 whatever. cuz i have no clue and knowing would be helpful. thanks. late.

[Bambikiller240]

see attachment

[280zgod]

well looks like i have the one on the left so r200 which is what end ratio 4.11 or3.9 anyone know?

[Mr Camouflage]

TO DETERMINE THE RATIO (internally)

If you're not sure which ratio R200 you have lying around the garage, check it this way:

Remove the rear plate (drain the oil of course). Then rotate the large ring gear until you see some numbers stamped into the edge facing you.

If it's a 3.54 it will read "39:11"

If it's a 3.70 it will read "37:10"

If it's a 3.90 it will read "39:10"

If it's a 4.11 it will read "37:9"

http://geocities.com/zgarage2001/engine.html

scroll down the page till you get to the part about diffs.

I thought they had 3.7 or 3.9 in the 260/280Z, though that site recons it would be a 3.54:ermm: