S12OC UK Forum - ca gearbox ratios

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S12OC UK Forum (http://nissansilvia.co.uk//index.php)

- S12 Discussion (http://nissansilvia.co.uk//forumdisplay.php?f=3)

- - ca gearbox ratios (http://nissansilvia.co.uk//showthread.php?t=1643)

PukkaSilvia

13-01-2007 00:32

ca gearbox ratios

what are the gear ratios for the et ca s12 and s13 gearboxes? are they in the manual?

Also does the s13 use a different size diff to the s12?

Magnum

13-01-2007 03:28

84-86 S12
1st 3.592:1
2nd 2.057:1
3rd 1.361:1
4th 1.000.:1
5th 0.821:1
Rev 3.657:1

86.5+ S12
FS5W71C Warner
1st 3.321:1
2nd 1.902:1
3rd 1.308:1
4th 1:000:1
5th 0.759:1
Rev 3.382:1

PukkaSilvia

13-01-2007 08:33

are they both ca18et S12 gearbox's, 1 which is mk1 and the other mk2?

s13eater

13-01-2007 11:15

the fj box also has a different ratio, i think shorter first 2 gears and a longer final drive

wacomuk

13-01-2007 11:21

whats the diff ratio? prob 3.92

s13eater

13-01-2007 11:23

Quote:

Originally Posted by wacomuk

whats the diff ratio? prob 3.92

what, on the fj dave.

wacomuk

13-01-2007 11:34

with it being an NA engine and a sporty car i would say 3.9 / 4.1

the lower the ratio (diff) the longer the gear

Magnum

13-01-2007 14:55

Quote:

Originally Posted by Pukkasilvia

are they both ca18et S12 gearbox's, 1 which is mk1 and the other mk2?

the first one is the MK1 and the second one is the MK2 tranny.

30psi

13-01-2007 23:24

You cant use the S13 crown wheel/pinion in the s12 case.

s13eater

13-01-2007 23:28

are you a vampire mart ?

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