The following is from the 1975 Factory Service Manual, under Propeller Shaft & Differential Carrier, page PD-3, under Description …

“The differential gear carrier assembly has a hypoid type drive pinion and ring gear set with a gear ratio of 3.545 for all models.”

The following is from the 1975 Factory Service Manual, under Propeller Shaft & Differential Carrier, page PD-3, under Description …

“The differential gear carrier assembly has a hypoid type drive pinion and ring gear set with a gear ratio of 3.545 for all models.”

The following is from the 1977 Factory Service Manual, under Propeller Shaft & Differential Carrier, page PD-3, under Description …

These are the only Factory Service Manuals I have checked. I would think the same information would be in all of them.

So, do you believe what’s in the Factory Service Manual and the gear ratio information from the IZCC website (Transmission and Rear End Gear Ratios) ???

Gear Ratios

240Z 70-73 MT (3.364) (R180)

240Z 70-73 MT 5spd. (3.900) (R180) - non US

240Z 71-73 Auto (3.545) (R180)

260Z 74 MT (3.364) (R180)

260Z 74 Auto (3.545) (R180)

280Z 75-76 (3.545) (R200)

280Z 77-78 MT (3.545) (R200)

280Z 77-78 Auto (3.545) (R180)

Everything seems consistent. What is there to disbelieve?

1974 260Z 2+2 MT R200 3.36 - for sure.

1975-76 280z 2+2 MT R200 3.36 - I think so.

Edited January 24, 201313 yr by John Coffey