Speedometer drive gear

[aarc240]

Anyone know of a 22 tooth (or maybe even 23 tooth) speedo drive gear?

If so, what colour is it and what model did it come from, if known?

I'm going to need one of these or an in-cable adaptor box to run the 4.6875 diff in our 240Z soon  .

 

oops, should've said this is for a 71B box.

[Mr240z]

YELLOW is the 16 tooth for the 3.36

BLACK is the 17 tooth for the 3.54

BLUE is the 18 tooth for the 3.70

WHITE is the 19 tooth for the 3.90

RED is the 20 tooth for the 4.11

PURPLE is the 21 tooth for the 4.38 

 

NOTE: There are 2 different aluminum cog "sleeves", a '75-80, and '81-83 with different cog "offsets". If you look closely in the picture above notice how the red cog is offset slightly to the right, and the blue to the left. This means you must keep the sleeve with the transmission it came in, and only swap the cog. Otherwise the cog may not mesh the proper way inside the trans. The weird one is the larger red 4.11 cog which requires a later ZX sleeve to fit into the older '77-'80 trans. But will the red cog fit into a later 280b? I don't believe so since the red cog is much larger than the white. So I'm using a white cog on my 4.11 rear which makes my speedometer read 10mph fast.

 

On 240's, you will have to cutout about 2 inches of metal from the front/right edge where the shifter goes through the trans tunnel when using a 5-speed. Otherwise the throw into 5th gear will hit. This cutting is the price of a 5-speed trans and is not a big deal at all, the console covers it.